Match linux command-line arguments to view their help text.
Tag: SysAdmin
system administrator related links
stackshare.io
Dev / Production stacks for all to see. Handy tool to see what software is trending today.
aws.amazon.com
Amazons’s cloud computing & web hosting service.
Amazon CloudWatch Application Signals adds new SLO capabilities
13 March 2026 @ 8:52 pm
Amazon CloudWatch Application Signals now offers three new console based capabilities for Service Level Objectives (SLOs): SLO Recommendations, Service-Level SLOs, and SLO Performance Report. CloudWatch Application Signals helps customers monitor and improve application performance on AWS. It automatically collects data from applications running on services like Amazon EC2, Amazon ECS, and Lambda. Previously, customers had to manually set SLO thresholds without data-driven guidance, often leading to misconfigured targets and alert fatigue. They also lacked visibility into overall service health across operations and had no way to track reliability trends over time or generate calendar periods performance reports. These new capabilities address each of those gaps, making it easier to set data-driven reliability targets, monitor overall service health, and identify reliability trends before they become incidents.
Accelerate serverless application development with new SAM Kiro power
13 March 2026 @ 6:00 pm
AWS announces the AWS Serverless Application Model (SAM) Kiro power, bringing serverless application development expertise to agentic AI development in Kiro. With this power, you can build, deploy, and manage serverless applications with AI agent-assisted development directly in your local environment.
SAM is an open-source framework that simplifies building serverless applications on AWS. SAM Kiro power dynamically loads relevant guidance and development expertise the AI agent needs to build serverless applications. This includes initializing SAM projects, building and deploying applications to AWS, and locally testing Lambda functions. The power supports event-driven patterns with Amazon EventBridge, Amazon Managed Streaming for Apache Kafka (MSK), Amazon Kinesis, Amazon DynamoDB Streams, and Amazon Simple Queue Service (SQS), while covering security best practices for IAM policies. Built-in guidance enf
Amazon EC2 R8a instances are now available in Asia Pacific (Tokyo) Region
13 March 2026 @ 5:30 pm
Starting today, Amazon EC2 R8a instances are now available in Asia Pacific (Tokyo) Region. These instances, feature 5th Gen AMD EPYC processors (formerly code named Turin) with a maximum frequency of 4.5 GHz, deliver up to 30% higher performance, and up to 19% better price-performance compared to R7a instances. R8a instances deliver 45% more memory bandwidth compared to R7a instances, making these instances ideal for latency sensitive workloads. Compared to Amazon EC2 R7a instances, R8a instances provide up to 60% faster performance for GroovyJVM, allowing higher request throughput and better response times for business-critical applications. Built on the AWS Nitro System using sixth generation Nitro Cards, R8a instances are ideal for high performance, memory-intensive workloads, such as SQL and NoSQL databases, distributed web scale in-memory caches, in-memory databases, real-time big data analytics,
Amazon EC2 M8azn instances are now available in US East (Ohio) Region
13 March 2026 @ 5:15 pm
Starting today, Amazon EC2 M8azn instances are now available in US East (Ohio) Region. These general purpose high-frequency high-network instances are powered by fifth generation AMD EPYC (formerly code named Turin) processors and offer the highest maximum CPU frequency, 5GHz in the cloud. M8azn instances offer up to 2x compute performance compared to previous generation M5zn instances, and up to 24% higher performance than M8a instances. M8azn instances deliver up to 4.3x higher memory bandwidth and 10x larger L3 cache compared to M5zn instances allowing latency-sensitive and compute-intensive workloads to achieve results faster. These instances also offer up to 2x networking throughput and up to 3x EBS throughput versus M5zn instances. Built on the AWS Nitro System using sixth generation Nitro Cards, these instances are ideal for applications such as real-time financial analytics, high-performance computing,
Amazon MSK announces support for Standard brokers Graviton-3 instance in Africa (Cape Town) region
13 March 2026 @ 5:00 pm
You can now create provisioned Amazon Managed Streaming for Apache Kafka (Amazon MSK) clusters with Standard brokers running on AWS Graviton3-based M7g instances in Africa (Cape Town) region.
Graviton M7g instances for Standard brokers deliver up to 24% compute cost savings and up to 29% higher write and read throughput over comparable MSK clusters running on M5 instances. To get started, create a new cluster with M7g brokers or upgrade your M5 cluster to M7g through the Amazon MSK console or the Amazon CLI and read our Amazon MSK Developer Guide for more information.
AWS Network Firewall Launch in the AWS European Sovereign Cloud
13 March 2026 @ 4:15 pm
Starting today, AWS Network Firewall is available in the AWS European Sovereign Cloud. With this launch, European customers, particularly those in highly regulated industries, government agencies, and organizations with strict data sovereignty requirements, can deploy AWS Network Firewall to protect their most sensitive workloads while maintaining full compliance with European Union (EU) data protection regulations. Through this expansion, customers using the AWS European Sovereign Cloud can leverage the same AWS Network Firewall capabilities available in other AWS Regions, while ensuring that all data and operations remain entirely within EU borders and under EU-based control. AWS Network Firewall is a managed firewall service that provides essential network protections for your Amazon Virtual Private Clouds (VPCs). The service automatically scales with network traffic volume to provide high-availability protections without the need to set up or maintain the underlying inf
Amazon EC2 Hpc8a instances are now available in Asia Pacific (Tokyo) and AWS GovCloud (US-West)
13 March 2026 @ 4:00 pm
Starting today, Amazon EC2 Hpc8a instances are available in Asia Pacific (Tokyo) and AWS GovCloud (US-West) regions. These instances are powered by 5th Gen AMD EPYC processors (formerly code named Turin). With a maximum frequency of 4.5GHz, Hpc8a instances deliver up to 40% higher performance and up to 25% better price performance compared to Hpc7a instances, helping customers accelerate compute-intensive workloads while optimizing costs. Compared to Hpc7a instances, Hpc8a instances also provide up to 42% higher memory bandwidth, further improving performance for memory-intensive simulations and scientific computing workloads. Built on the latest sixth-generation AWS Nitro Cards, Hpc8a instances are designed for compute-intensive, latency-sensitive HPC workloads. They are ideal for tightly coupled applications such as computational fluid dynamics (CFD), weather forecasting, explicit finite element analysis (FEA), and multiphys
AWS Lambda Managed Instances now supports Rust
13 March 2026 @ 2:00 pm
AWS Lambda Managed Instances now supports Rust, enabling developers to run high-performance Rust-based functions on Lambda-managed Amazon EC2 instances while maintaining Lambda’s operational simplicity. This combination makes it easier than ever to run performance-critical applications without the complexity of managing servers. Lambda Managed Instances gives Lambda developers access to specialized compute configurations, including the latest-generation processors and high-bandwidth networking. Lambda Managed Instances are fully managed EC2 instances, with built-in routing, load-balancing and auto-scaling, with no operational overhead. They combine Lambda’s serverless experience with EC2 pricing advantages including Compute Savings Plans and Reserved Instances. Rust support for Lambda Managed Instances combines these benefits with the performance and efficiency of Rust, including parallel request processing within each execution environment. Together, using Lambda Manag
OpenSearch UI supports Cross Account Data Access to OpenSearch domains
12 March 2026 @ 8:40 pm
Amazon OpenSearch Service now supports cross-account data access, enabling users to access OpenSearch domains hosted in different AWS accounts from within a single OpenSearch UI application. With this feature, you can query or build dashboard with data from OpenSearch domains across different accounts in the same region - without switching to a new endpoint or replicating data. Cross-account data access is available for OpenSearch domains hosted in both public and Virtual Private Cloud (VPC) configurations. With cross-account data access, teams no longer need to consolidate data into a single account or maintain costly data pipelines to enable unified analysis across organizational boundaries. This makes it easier to build centralized observability, search, and security analytics workflows that span multiple AWS accounts while keeping data in place and maintaining each account's access controls. Cross-account data access supports both IAM (including SAML via IAM federation)
New LZA MCP Server for AI-assisted configuration management
12 March 2026 @ 7:23 pm
The Landing Zone Accelerator on AWS (LZA) Model Context Protocol (MCP) Server is now open source, enabling organizations to manage LZA deployments through natural language conversations with AI assistants. Using the new LZA MCP Server, you can streamline configuration tasks that previously required time-intenstive manual work. The LZA MCP Server provides 20 specialized tools that help you search documentation across multiple LZA versions, manage configurations, monitor pipelines, and surface actionable insights when deployment failures occur. The server operates as a containerized MCP endpoint compatible with IDEs including Kiro, Amazon Q Developer, and Claude Code, using temporary credentials following AWS security best practices. The LZA MCP Server is open source and available now. Visit the AWS Labs GitHub r
networkworld.com
Information, intelligence and insight for Network and IT Executives.
Data mining? Old servers could become new source of rare earths
13 March 2026 @ 9:13 pm
The retirement of old server equipment from data center facilities could become an opportunity for enterprises to generate revenue, instead of being an often costly recycling expense.
Last year Western Digital announced it was experimenting with new ways to extract valuable rare earth elements and metals from obsolete servers from Microsoft’s US data centers, as part of a collaboration with Critical Materials Recycling and PedalPoint Recycling.
And on Thursday, Reuters
Meta is developing more AI chips for itself
13 March 2026 @ 4:49 pm
With demand for AI chips rising and supplies tightening, Meta is taking its AI computing needs into its own hands and developing more of its own chips: It will produce four new generations of chips over the next two years.
Cloud computing giants including Meta, AWS, and Google have been keen to develop their own chips to improve the performance of their own data centers. Meta started its own chip program in 2023, when it implemented the Meta Training and Inference Accelerator (MTIA), a family of custom-built silicon chips to power its AI workloads efficiently.
The MTIA 300, which Meta will use
How AWS is reinventing the telco revenue model
13 March 2026 @ 2:37 pm
MWC is a notoriously noisy event with a seemingly endless stream of news. If you spend your time chasing the latest product announcements, you’ll likely miss the structural shift happening underneath the surface. The telecom industry has spent the better part of a decade talking about cost-cutting and “telco transformation,” but at MWC 2026, the conversation pivoted toward a more aggressive, overdue topic: evolving the network from a cost center into a service-delivery platform that generates actual, incremental revenue. This is a problem that’s decades old, as telcos continually spend money without being able to monetize the investment with new
What’s the biggest barrier to AI success?
13 March 2026 @ 1:58 pm
AI’s challenge starts with definition. We hear all the time about how AI raises productivity, and many have experienced that themselves. But what, exactly, does “productivity” mean? To the average person, it means they can do things with less effort, which they like, so it generates a lot of favorable AI stories. To a business, though, it means more revenue-generating output per unit of input, such as labor, capital, and materials. It means a business case, which any tech project requires working with the CFO to prove.
AI projects have to prove that they can transform per
Arista targets AI data centers with new liquid cooled pluggable optic module
13 March 2026 @ 1:45 pm
Arista Networks this week announced that it has developed a 12.8 Tbps liquid cooled optics module that it says will help address the power and performance needed for AI data center network development.
The module, called the eXtra-dense Pluggable Optics (XPO) offers 12.8Tbps of bandwidth using 64 electrical lanes and includes an integrated liquid-cooled cold plate capable of supporting
IBM proposes unified architecture for hybrid quantum-classical computing
13 March 2026 @ 1:50 am
Quantum computing has moved past the “science curiosity” stage, but, ultimately, hasn’t reached the general-purpose, fault-tolerant phase.
This, researchers say, requires the use of quantum computers and classic high performance computing (HPC) in tandem. When combined, they can process emerging algorithms and workflows, and truly scale real-world applications.
To this end, IBM has released what it calls the industry’s first published quantum‑centric supercomputing (QCSC) reference architecture. The new blueprint outlines how quantum and clas
FluidCloud’s Large Infrastructure Model targets the multicloud networking gap
12 March 2026 @ 6:58 pm
Migrating entire workloads from one cloud to another is not a trivial matter.
Terraform, the de facto standard for Infrastructure-as-Code (IaC) technology, was designed to make infrastructure portable across cloud providers. The reality is more nuanced and often painful. Each cloud provider uses its own resource dialects, migrations stretch into months of manual rewrites, and AI tools that claim to generate production-ready IaC still fail on networking, IAM, and service dependencies.
FluidCloud, a
Cisco grows high-end optical support for AI clusters
12 March 2026 @ 6:24 pm
Cisco has taken the wraps of new optical gear aimed at supporting the advanced network infrastructure required to handle distributed AI workloads.
“AI is fueling exponential traffic growth, exposing traditional data center boundaries, and pushing workloads across networks. Training the largest frontier AI models now requires connecting multiple data centers and overcoming power and space limitations that once constrained centralized architectures,” wrote Bill Gartner, senior vice president and general manager of Cisco’s Optic
Nvidia: Latest news and insights
12 March 2026 @ 4:03 pm
More processor coverage on Network World:Intel news and insights | AMD news and insights
With its legacy of innovation in GPU technology, Nvidia
F5 brings new visibility and AI controls to Big-IP, NGINX
11 March 2026 @ 7:35 pm
F5 has built its business on application delivery and security across distributed environments.
At its AppWorld conference in Las Vegas this week, F5 announced a broad set of updates to its
forensicswiki.org
Computer forensic tools and techniques used by investigators
cyberciti.biz
online community of new and seasoned Linux / Unix sysadmins.
Download of the day: GIMP 3.0 is FINALLY Here!
18 March 2025 @ 3:45 am
Wow! After years of hard work and countless commits, we have finally reached a huge milestone: GIMP 3.0 is officially released! I am excited as I write this and can't wait to share some incredible new features and improvements in this release. GIMP 2.10 was released in 2018, and the first development version of GIMP 3.0 came out in 2020. GIMP 3.0 released on 16/March/2025. Let us explore how to download and install GIMP 3.0, as well as the new features in this version.
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How to list upgradeable packages on FreeBSD using pkg
16 March 2025 @ 8:25 pm
Here is a quick list of all upgradeable packages on FreeBSD using pkg command. This is equivalent to apt list --upgradable command on my Debian or Ubuntu Linux system.
Love this? sudo share_on: Twitter - Ubuntu to Explore Rust-Based “uutils” as Potential GNU Core Utilities Replacement
16 March 2025 @ 12:17 pm
In a move that has sparked significant discussion within the Ubuntu Linux fan-base and community, Canonical, the company behind Ubuntu, has announced its intention to explore the potential replacement of GNU Core Utilities with the Rust-based "uutils" project. They plan to introduce new changes in Ubuntu Linux 25.10, eventually changing it to Ubuntu version 26.04 LTS release in 2026 as Ubuntu is testing Rust 'uutils' to overhaul its core utilities potentially. Let us find out the pros and cons and what this means for you as an Ubuntu Linux user, IT pro, or developer.
Love this? sudo share_on: Twitter -
How to install KSH on FreeBSD
3 March 2025 @ 11:50 pm
Installing KSH (KornShell) on FreeBSD can be done with either FreeBSD ports or the pkg command. The ports collection will download the KSH source code, compile it, and install it on the system. The pkg method is easier, and it will download a pre-compiled binary package. Hence, it is recommended for all users. KornShell (KSH) has a long history, and many older Unix systems and scripts rely on it. As a result, KSH remains relevant for maintaining and supporting legacy infrastructure. Large enterprises, especially those with established Unix-based systems, continue to use KSH for scripting and system administration tasks. Some industries where KSLinux Sed Tutorial: Learn Text Editing with Syntax & Examples
3 March 2025 @ 9:47 am
Sed is an acronym for "stream editor." A stream refers to a source or destination for bytes. In other words, sed can read its input from standard input (stdin), apply the specified edits to the stream, and automatically output the results to standard output (stdout). Sed syntax allows an input file to be specified on the command line. However, the syntax does not directly support output file specification; this can be achieved through output redirection or editing files in place while making a backup of the original copy optionally. Sed is one of the most powerful tools on Linux and Unix-like systems. Learning it is worthwhile, so in tHow to tell if FreeBSD needs a Reboot using kernel version check
23 February 2025 @ 10:07 pm
Keeping your FreeBSD server or workstation updated is crucial for security and stability. However, after applying updates, especially kernel updates, you might wonder, "Do I need to reboot my system?" Let's simplify this process and provide a straightforward method for determining whether a reboot is necessary using the CLI, shell script, and ansible playbook.
Love this? sudo share_on: TwitterCritical Rsync Vulnerability Requires Immediate Patching on Linux and Unix systems
15 January 2025 @ 6:04 pm
Rsync is a opensource command-line tool in Linux, macOS, *BSD and Unix-like systems that synchronizes files and directories. It is a popular tool for sending or receiving files, making backups, or setting up mirrors. It minimizes data copied by transferring only the changed parts of files, making it faster and more bandwidth-efficient than traditional copying methods provided by tools like sftp or ftp-ssl. Rsync versions 3.3.0 and below has been found with SIX serious vulnerabilities. Attackers could exploit these to leak your data, corrupt your files, or even take over your system. There is a heap-based buffer overflow with a CVSS score of 9.8 that needs to be addressed on both the client and server sides of rsync package. Apart from that info leak via uninitialized stack contents defeats ASLR protection and rsync server can make client write files outside of destination directory using symbolic links.
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How to control the SSH multiplexing with the control commands
15 January 2025 @ 8:29 am
Multiplexing will boost your SSH connectivity or speed by reusing existing TCP connections to a remote host. This is useful when you frequently connect to the same server using SSH protocol for remote login, server management, using IT automation tools over SSH or even running hourly backups. However, sometimes your SSH command (client) will not respond or get hung up on the session when using multiplexing. Typically, this happens when your public IP changes (IPv4 to IPv6 changes when using DNS names), VPN issues, or firewall cuts connections. Hence, knowing SSH client control commands can save you time and boost your productivity when such gotcZFS Raidz Expansion Finally, Here in version 2.3.0
14 January 2025 @ 9:19 am
After years of development and testing, the ZFS raidz expansion is finally here and has been released as part of version 2.3.0. ZFS is a popular file system for Linux and FreeBSD. RAIDz is like RAID 5, which you find with hardware or Linux software raid devices. It protects your data by spreading it across multiple hard disks along with parity information. A raidz device can have single, double, or triple parity to sustain one, two, or three hard disk failures, respectively, without losing any data. Hence, expanding or adding a new HDD is a very handy feature for sysadmins in today's data-sensitive apps.
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How to run Docker inside Incus containers
18 December 2024 @ 5:44 am
Incus and Docker both use Linux kernel features to containerize your applications. Incus is best suited when you need system-level containers that act like traditional VMs and provide a persistent developer experience. On the other hand, Docker containers are ephemeral, i.e., temporary in nature. All files created inside Docker containers are lost when your Docker container is stopped or removed unless you stored them using volumes in different directories outside Docker. Docker is created as a disposable app deployment system. Incus containers are not typically created as disposables, and data is kept inside heartinternet.co.uk
Hosting packages for an initial web presence
Hosting VPS Linux vs Windows VPS
9 March 2026 @ 3:03 pm
The post Hosting VPS Linux vs Windows VPS appeared first on Heart Internet.
Domain Name Transfer Checklist: Everything You Need to Know
3 March 2026 @ 2:56 pm
The post Domain Name Transfer Checklist: Everything You Need to Know appeared first on Heart Internet.
Heart Internet Win Gapstars Innovation Award 2026
23 February 2026 @ 11:57 am
We’re incredibly proud to celebrate our Site Reliability Engineering team, who have won the Gapstars Innovation Award for their outstanding work improving platform stability, security, and visibility across our shared...
The post Heart Internet Win Gapstars Innovation Award 2026 appeared first on Heart Internet.
A/B Testing Explained: A Practical Guide To Better Results | Part 1
20 February 2026 @ 8:32 am
If you want to improve your website you probably need to do A/B testing, otherwise known as split testing. Instead of guessing, A/B testing allows you to experiment more scientifically....
The post A/B Testing Explained: A Practical Guide To Better Results | Part 1 appeared first on Heart Internet.
How to enable two-factor authentication (2FA) on your Heart Internet account
28 January 2026 @ 12:37 pm
Account security matters, and switching on two-factor authentication (2FA) is a quick win. 2FA adds a second check during the sign-in process, so even if someone compromises your password, they still can’t get in. To enable 2FA: Step 1: Open your...
The post How to enable two-factor authentication (2FA) on your Heart Internet account appeared first on Heart Internet.
How to Choose the Perfect Domain Name for Your Business
9 July 2025 @ 9:30 am
Get Your Name Right – The Internet Never Forgets Choosing a domain name might sound simple – until you realise it’s the online equivalent of naming your child. No pressure....
The post How to Choose the Perfect Domain Name for Your Business appeared first on Heart Internet.
What is a VPS? And is it Time You Got One?
25 June 2025 @ 9:30 am
Discover what a VPS server is, how VPS hosting works, and why it’s ideal for small businesses. Learn the benefits and explore VPS plans with Heart Internet.
The post What is a VPS? And is it Time You Got One? appeared first on Heart Internet.
We’re Now Certified by the Green Web Foundation
11 June 2025 @ 9:30 am
💚 Hosting that works hard, treads lightly. Big news: Heart Internet is now officially listed with the Green Web Foundation. That means our hosting services are recognised as being...
The post We’re Now Certified by the Green Web Foundation appeared first on Heart Internet.
What is Web Hosting and Why Does Your Business Need It?
6 May 2025 @ 4:54 pm
Without web hosting, your website would not be visible or accessible to users! It is crucial to host your website with a website hosting service to ensure that your business...
The post What is Web Hosting and Why Does Your Business Need It? appeared first on Heart Internet.
How to Enable Root Access via SSH on Your VPS for Migration using Plesk
11 March 2025 @ 7:41 am
If you get one of the following messages from the Plesk migrator you should check that you are using root as the username along with the Plesk admin password. “The...
The post How to Enable Root Access via SSH on Your VPS for Migration using Plesk appeared first on Heart Internet.
serverfault.com
Common Server issues – FAQs and answers from those in the know
HCL Domino LDAP with DA: No phone numbers
13 March 2026 @ 5:42 pm
Good morning everyone.
I'm trying to use HCL Domino's LDAP service to provide an Asterisk PBX with a directory of phone numbers.
What I've done so far
After enabling the LDAP service, I created a database (let's call it asterisk_phones.nsf) to store the numbers using the StdR4PublicAddressBook template. I then created the Directory Assistant database (let's call it asterisk_da.nsf) and configured it to use asterisk_phones.nsf (see the following images).
Once done, I manually insert
Once done, I manually insertConnect an internal network to the Internet without NAT and with an IPsec tunnel [closed]
13 March 2026 @ 1:30 pm
Is it possible to connect an internal network to the Internet without NAT and through an IPsec tunnel?
How can it be implemented?
Is it a forwarding problem?
Preventing automatic PostgreSQL restarts on a Ubuntu server after minor upgrades?
13 March 2026 @ 1:10 pm
I generally like to run software updates on our (low-traffic) Ubuntu 24.04 servers during the workday, then schedule any required reboots in the middle of the night.
PostgreSQL 16 is installed from the PGDG apt repo. I've got this needrestart configuration in /etc/needrestart/conf.d/postgresql.conf:
$nrconf{override_rc}{qr(^postgresql)} = 0;
This should, AFAIK, prevent PostgreSQL from getting bounced by library upgrades. I'm fine with the overnight reboot restarting it instead.
But, if I do a minor/patch version upgrade of PostgreSQL itself (and/or possibly postgresql-common), this has no effect, and the service restarts each time. Troublingly, I haven't found what it is that's actually performing the restart in this case. It's not apt-get, which lists the things it's restarting, one of which isn't PostgreSQL. So I'm assuming it's in the postinstall scripts, but I also haven't found any place there where
pam_radius_auth 3.0.0 reuses OTP as password in PAM (works correctly with 1.4.0)
13 March 2026 @ 10:56 am
I am configuring SSH authentication with PAM and RADIUS OTP (RSA SecurID). The setup worked correctly with pam_radius_auth 1.4.0, but after upgrading to pam_radius_auth 3.0.0, the OTP entered for RADIUS authentication is automatically reused as the password for the local PAM module.
This causes authentication to fail because the OTP is treated as the UNIX password.
Environment
SSH Server: OpenSSH_8.0
Client: OpenSSH_for_Windows_9.5
OS: RHEL/CentOS based Linux
PAM module: pam_radius_auth
RADIUS backend: RSA SecurID Authentication Manager
Expected behavior (pam_radius_auth 1.4.0)
SSH login works as expected:
ssh [email protected]
Password:
OTP:
Password → verified by pam_unix
OTP → verified by RADIUS
Actual
Proxy to capture all JSON returned from requests [closed]
12 March 2026 @ 9:22 pm
I would like to capture the JSON files that are returned from a series of requests I make from a Mac browser. I'm thinking some sort of a proxy makes sense, but can't make postman do what I want. Is there a better option? I can filter during capture or have scripts filter results for deselect data.
How to Disable off site mail relaying
11 March 2026 @ 6:06 pm
I am relatively new to server management. My web server(server 2019) is being scanned with a remediation tool and is showing a remediation of "Disable offsite mail relaying".
What I have tried so far.
Opened IIS 6.0 manager > right clicked on SMTP virtual server > properties > went to the "Access" tab > went in to Authentication and set to Integrated windows authentication. Set connection to only allow the list below and gave it my local host machine at 127.0.0.1. Did the same with relay and unchecked the option to allow all computers which successfully authenticate to relay.
Stopped the IIS admin service and SMTP service.
Started the IIS admin service and SMTP service.
After doing all of this and rescanning my machine the remediation is still active. Not sure what to look at next?
Any advise would be greatly appreciated.
WireGuard VPN server in Cudy WR3000 router doesn't work, but OpenVPN does
11 March 2026 @ 7:56 am
I set up OpenVPN server on a Cudy WR3000 router, but I can't get WireGuard to work.
The WireGuard handshake on the client shows "Sent" bytes but "0 Received" bytes.
What I tested:
OpenVPN Works: I enabled the OpenVPN server on the Cudy using port 1194. After forwarding 1194 on the ISP router, it works perfectly. This proves my Static IP and Port Forwarding logic are correct.
Cross-Port Testing: I tried moving the WireGuard Listen Port to 1194, instead of default (after disabling OpenVPN), but still no handshake.
MTU Adjustments: I lowered MTU to 1280 on both Server and Client to account for potential fragmentation/ISP overhead.
Peer Settings: On the Cudy, I set the Peer "Remote Subnet" to 0.0.0.0/0 and "Allowed IPs" to 0.0.0.0/0.
My .conf file of the cliend as automatically generated from cudy is:
Unable to enable TLS 1.1 on Windows Server 2022 Datacenter Azure Edition
11 March 2026 @ 5:49 am
I am in the process of migrating my ASP.NET framework application (running in IIS) onto a Microsoft Azure virtual machine. I have run into a problem.
TSL version 1.1 is officially deprecated. Nevertheless, we have to support it, because there are Android devices from 2014 that talk to our server.
I have found an online testing tool https://www.apivoid.com/tools/tls-version-checker/ that tells me which TLS versions my server supports.
My existing server, which is running **Microsft Windows Server 2022 Standard**, is supporting TLS 1.0 and 1.1.
The same application, which is running Microsoft Windows Server 2022 Datacenter Azure Edition, does not support these. And I cannot make it work.
Later Edit: The problem wasn't specific to Azure edition, but
Seeking Guidance: Replacing NGINX Mail Proxy with Postfix for Outbound Email Controls
10 March 2026 @ 6:16 am
I’m looking for some advice around Postfix and whether it can help solve an issue we’re currently facing with outbound email control in Google Cloud Platform (GCP).
Could you please update if the following are possible to implement through Postfix:
Limit the number of emails per sender or source IP per hour
To collect the details of sender address or source IP to track who exceeds these limits from Postfix logs
If yes then please provie me some example configuration which will help me to implement.
Thanks in advance.
Windows Server 2025 RDP client login: username auto-prefixed by computer name
5 March 2026 @ 10:24 pm
I have two Windows Server 2025. SERVER-DEV is a clone of SERVER-LIVE with the same user accounts. For several months I used RDP to connect from SERVER-DEV to SERVER-LIVE without issues. Since recently when RDP opens the Windows Security dialog my username gets auto-prefixed with the machine name: SERVER-DEV\username which of course won't work for the other machine. Also explicitly entering .\username still gets extended with the local machine name. So currently I can not make a connection from WinServer25.
From Win11 or Win10 the login works flawlessly as before. The username stays as I entered it and it just works.
The two servers are WinServer DataCenter and both "standalone", so not part of a domain. RDP runs on a custom port. In Credential Manager there are no saved Windows credentials. The computer names is added after I click OK for for username and password.
I installed several updates on the WinServer25 machines 2 weeks ago and I suspect this h
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