Common Server issues – FAQs and answers from those in the know
DNS issue with Asian Traffic
23 January 2026 @ 5:08 pm
I have a website which it's root domain is pointing to an IP address whose server is down. And the subdomain www version is pointing to a server that is reachable.
So if I check both domains on dnschecker.org it shows that both domains they are not propagating in other locations in Asia.
What could be causing the issue?
Unable to connect to C socket server via public IP on Windows (Tenda D301 router, PPPoE)
23 January 2026 @ 2:32 pm
I wrote a server in C running on Windows using network sockets.
The client connects to the server using the server public IP address.
When I attempt to connect from the client, the connection times out.
Here’s what I’ve tried:
Assigned a static local IP to the server machine and forwarded the port to it.
Enabled DMZ to direct all traffic to the server.
Disabled the router firewall.
Followed the Tenda D301 manual instructions for port forwarding.
Temporarily disabled Windows Firewall.
Tested with external port-checking tools, which consistently report the port as closed.
Despite these steps, the client cannot connect via the public IP.
Additional details:
Router: Tenda D301
Connection mode: PPPoE (attempted Bridge mode, but router failed to connect to ISP)
Question:
What reliable me
WSL cannot ping Internet (Omada Setup)
23 January 2026 @ 2:08 pm
I have an issue with my Omada configuration.
Trying to connect to the Internet using Windows Subsystem for Linux (WSL) fails. If I change my wifi to mobile hotspot, it works.
So I know it's an Omada configuration issue on my side.
My host PC is in a subnet VLAN and it works, but the WSL does not. I understood the WSL is in a different subnet 172.23.n.n from this:
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1350 qdisc mq state UP group default qlen 1000
link/ether 00:15:5d:bc:85:41 brd ff:ff:ff:ff:ff:ff
inet 172.23.247.176/20 brd 172.23.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::215:5dff:febc:8541/64 scope link
valid_lft forever preferred_lft forever
and maybe because of that, Omada is dropping (my host subnet is 192.168...)
When I use my omada wifi setup, this is Local + WSL:
Wireless LAN adapter Wi-Fi:
Connection-specific DNS Suffix .
Who do I email for Billing Support?
23 January 2026 @ 2:07 pm
Hi there for context I received an email about GCP billing but I am pretty sure I did not overuse the free credit and it was a project from quite some time back, so the billing account has been closed and I’m not sure who to contact now, the GCP assistant does not direct me to any technical support and is only a chatbot to answer simple queries, can anyone send help for this, I’ve been notified they will be passing on to debt agency soon, thank you!
Apache ProxyPass or fallback to local files
23 January 2026 @ 12:27 pm
I am looking to run Iocaine on a server hosting a few websites using Apache httpd. It's documentation lists examples for several reverse proxy setups and they basically all come down to handling a HTTP 421 Misdirected Request response by serving the proper content instead.
I've searched online, but aside from abusing load balancing directives for this purpose, which would then result in Iocaine not processing any requests for the duration of the time-out. I'm not even sure those directives would even kick in for a 421 status, and I can't find anything conclusively telling me whether something like this would be possible with Apache.
Migrate to new Email Server
23 January 2026 @ 12:07 pm
I have currently an older (3-5 years) running Email Server and I it's about time to migrate/update to a newer one.
The multi-domain mail server is using Postfix, Dovecot, Postfixadmin, ClamAV and SpamAssassin, Let's Encrypt Certs on a CentOS VPS.
With SPF, DKIM, DMARC in place for multiple domains, it gives me a headscratch on how to migrate to a new server without changing the Email Server domain.
More specific:
the mx.main-domain.tld is sending and receiving Emails for multiple domains domain1.tld (not main-domain.tld ), domain2.tld (not main-domain.tld )
DNS main-domain.tld
Host Type Value TTL
@ A 100.100.100.1 auto
@ MX mx.main-domain.tld auto
mx CNAME main-domain.tld auto
If I create a new updated server I need an A record, CNAME and MX record. If I change the current A record to the new server, emails will bounce or drop until the new server is up and ready
Large discrepances on plan for a SQLServer query
23 January 2026 @ 11:01 am
I enabled QueryStore on a SQL Server database and I see 1 specific query taking a lot of time. But this seems to be specific to a few calls (with specific parameters maybe?).
This is a call to a stored procedure btw.
If I run this query now with some parameters I get instant response.
Is there a way to know exactly what were the calls that were made during this period that caused this huge impact on duration?
If I run this query now with some parameters I get instant response.
Is there a way to know exactly what were the calls that were made during this period that caused this huge impact on duration?IKEv1 phase 2 fails with NO_PROPOSAL_CHOSEN but everything about phase 2 is correct. What else could be the cause?
23 January 2026 @ 8:39 am
Trying to connect an ECU-1051TL-R10A device to an IPsec VPN, using IPsecSite and Strongswan. Phase 1 completes successfully, but NO_PROPOSAN_CHOSEN error stops me from completing the connection.
ipsec.conf
conn site
authby=secret
auto=add
keyingtries=%forever
#rekey=no
keylife=1h
keyexchange=ikev1
ike=aes256-sha256-modp2048
esp=aes256-sha256
dpdaction=restart
dpddelay=30s
dpdtimeout=150s
ikelifetime=86400s
type=tunnel
left=%defaultroute
leftsubnet=192.168.1.1/24
leftauth=psk
leftid=%any
right=94.x.y.z
rightid=%any
rightsubnet=192.168.1.a/24
rightauth=psk
ipsec.secrets
%any %any : PSK "zzzzzzzzzzzzzzzzzzzz"
charon output when initializing connection:
swanctl -i --ike site
[IKE] initiating Main Mode IKE_SA site[2] to 94.x.y.z
[ENC] generating ID_PROT request 0 [ SA V V V V V ]
[NET] sending packet: from
Harbor fails to list artifacts: "400 OK" error in UI
23 January 2026 @ 5:13 am
I am using
Harbor version: v2.14.1-f1393edc
Harbor helm chart version: 1.18.1
I deployed Harbor and created a Docker Hub proxy cache. I am using Nebius object storage which is s3-compatible storage.
The Docker Hub proxy cache seems working well, and files succeed writing to Nebius object storage.
However, when I click one artifact
I got error for example
Here is my Harbor helm chart values
expose:
type: clusterIP
tls:
enabled: false
externalURL: https://harbor.example.com
existingSecretAdminPassword: hm-harbor-secret
existingSecretAdminPasswordKey: HARBOR_ADMIN_PASSWORD
core:
replicas: 3
jobservice:
replicas: 3
portal:
replicas: 3
registry:
repli
However, when I click one artifact
I got error for example
Here is my Harbor helm chart values
expose:
type: clusterIP
tls:
enabled: false
externalURL: https://harbor.example.com
existingSecretAdminPassword: hm-harbor-secret
existingSecretAdminPasswordKey: HARBOR_ADMIN_PASSWORD
core:
replicas: 3
jobservice:
replicas: 3
portal:
replicas: 3
registry:
repliAzure Budget creation: Why is "Actual" cost greyed out in Alert conditions?
22 January 2026 @ 11:45 pm
I am attempting to set up a new Budget in the Azure Portal under Cost Management -> Budgets for an Azure Subscription.
When I reach the Alert conditions tab to set my alert thresholds, the Type dropdown for "Actual cost" is greyed out/disabled, and I am only able to select "Forecasted." Why?
Details of my environment:
Scope: Azure Subscription
Offer Type: Pay-As-You-Go
Permissions: I have Owner permissions on this scope.
I have confirmed that there is active spending and historical data visible in the Cost Analysis views for this scope.
Screenshot of the issue: