Common Server issues – FAQs and answers from those in the know
Use a stored passphrase in keepassxc to logon
23 March 2026 @ 6:52 pm
I work on a Fedora client and created a new keypair. I want to use KeepassXC to store the private key and passphrase and followed the steps in the documentation.
create a keypair with a passphrase
create a new entry in the keepass database
under advanced attach the private key to this entry
in the SSH agent section select the attachment and mark the "Add key..." checkbox
as password set the passphrase used in step 1.
on a server append the public key to the ~/.ssh/authorized_keys file
remove the newly created keypair, they are now in keepass database (private) and on the server (public)
Now when I attempt to logon with user@server the entry in the keepass db are ignored and I'm asked for the password.
Which step did I miss? Debug reveals:
debug1:
How to use ssh-copy-id to copy a new key to a server
23 March 2026 @ 6:23 pm
I created a new key to be used on a server I have logged on before. I created the key and want to copy this to the server with ssh-copy-id but I get the following message:
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/j/.ssh/id_ed25519.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: WARNING: All keys were skipped because they already exist on the remote system.
(if you think this is a mistake, you may want to use -f option)
what would be the recommended way to copy a new key to the server?
RSYNC failing for very large files with connection closed
23 March 2026 @ 5:51 pm
I'm trying to rsync over ssh from one linix machine to another, a very large file (multi TB size) and running into a forced connection closed error:
rsync: connection unexpectedly closed (70706 bytes received so far) [generator]
rsync error: error in rsync protocol data stream (code 12) at io.c(232) [generator=3.2.7]
rsync: [sender] write error: Broken pipe (32)
rsync error: error in rsync protocol data stream (code 12) at io.c(845) [sender=3.2.5]
I'm using the following command:
rsync -e 'ssh -i id_rsa' -vlogDtprCz my_file.tar.gz [email protected]:/home/user/my_file.tar.gz
The same command above works without issue for smaller files ~15GB so I'm not sure what is causing the issue.
What defines the default email sending domain?
23 March 2026 @ 5:08 pm
I have two servers. Both are running Ubuntu 24.04.4 LTS and postfix 3.8.6 (installed by the package manager). The postfix configurations are identical, with the exception of server-specific host and domain names. My issue is that I'm seeing different mail sending behavior on the servers. Here's an example of the log entry when email is sent from a local account on the first server to an email address on another server:
2026-03-23T12:45:11.977293-04:00 myfirstdomain opendmarc[1295]: ignoring connection from localhost
2026-03-23T12:45:11.977685-04:00 myfirstdomain postfix/cleanup[3622]: EBFC46060488: message-id=<[email protected]>
2026-03-23T12:45:11.983517-04:00 myfirstdomain opendkim[1310]: EBFC46060488: DKIM-Signature field added (s=default, d=myfirstdomain.net)
2026-03-23T12:45:11.984578-04:00 myfirstdomain postfix/qmgr[3613]: EBFC46060488: from=<sah62@host>, size=360, nrcpt=1 (queue active)
2026-03-23T12:45:12.588366-04:00 my
Ivanti vtm Logs
23 March 2026 @ 12:39 pm
I was testing the syslog feature in ivanti vtm to send logs to an external system. I tried using udp with message size 2048. The logs i receive however seems incomplete and cut off at the end probably because of size limitation. Is there a way to fix this and get the full log events. Is tcp option available in ivanti vtm and can the message size be increased without causing issues?
How to properly configure a "mirror" DNS server for failover in KVM (Rocky Linux 10)?
23 March 2026 @ 5:04 am
I'm currently working as a collaborator in my university's network services department. Our infrastructure aims to follow Uptime Institute Tier II standards, so we are focusing heavily on redundancy and fault tolerance.
I've been tasked with setting up a secondary DNS server that acts like a "mirror" (that's how my professor called it). Our primary DNS server has a public IP and is currently handling all requests. I was given a separate physical server running Rocky Linux 10 Minimal where I have to create a VM using KVM and configure it to act as a mirror of the primary DNS server so it can take over if the latter fails or needs maintenance.
I have experience setting up a DNS server within a LAN for experimental purposes, but I'm unsure about the best practices for this scenario.
My specific questions are:
What is the standard approach to synchronize the DNS records from the primary to this new secondary server (we use BIND9)?
How
Proxy error with Apache 2.4 proxy to fastcgi PHP 8.2.29 on Windows 11
22 March 2026 @ 6:22 pm
I'm trying to setup fastcgi proxy to PHP 8.2.29 from Apache 2.4 on Windows 11 and get this error:
Proxy Error
The proxy server could not handle the request
Reason: DNS lookup failure for: 127.0.0.1:9082c:
After the port number, "c:" appears
<VirtualHost *:80>
ServerName 82.lc
DocumentRoot "C:/server/www/82"
<Directory "C:/server/www/82">
AllowOverride All
Require all granted
DirectoryIndex index.html index.htm index.php
</Directory>
<FilesMatch "\.php$">
SetHandler "proxy:fcgi://127.0.0.1:9082"
</FilesMatch>
</VirtualHost>
Apache error.log:
[Sun Mar 22 08:22:47.412642 2026] [proxy:error] [pid 30616:tid 1260] (OS 11001)Není znám žádný takový hostitel. : [client 127.0.0.1:58550] AH00898: DNS lookup failure for: 127.0.0.1:9082c: returned by /index.p
unable to setup user's cron job inside FreeBSD jail
22 March 2026 @ 8:53 am
I have created a FreeBSD jail and it works, but I'm unable to add any user's cron jobs.
When I execute crontab -e I'm getting the following error message crontab: seteuid: Operation not permitted. I'm logging into the jail using command jailme myjail sh
Unfortunately, I did not found a hint in man about enabling to execute command with SUID bit set inside jail.
In the meantime I have to login into jail as root and use crontab -u user -e
Ipsec l2tp, ikev2 and xauth does not work on strongswan in Centos
21 March 2026 @ 11:42 pm
So i have centos 7.9 with strongswan and xl2tpd installed.
I can only connect with success when i setup client with a l2tp connection without ipsec psk - just unencrypted l2tp.
Other connections - l2tp ipsec psk, xauth psk, ikev2 psk - are not working.
Here are my configs:
/etc/strongswan/ipsec.conf:
config setup
#virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12
#virtual-private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12
#protostack=netkey
# Add connections here
conn l2tpvpn
type=transport
authby=secret
pfs=no
rekey=no
keyingtries=2
left=%any
leftprotoport=udp/l2tp
leftid=@l2tpserver
right=%any
rightprotoport=udp/%any
auto=add
conn ikev2vpn
auto=add
compress=no
type=tunnel
keyexchange=ikev2
ike=chacha20poly1305-sha512-curve25519-prfsha512,aes256gcm16-sha384-prfsha384
Dovecot SMTP configuration issue
21 March 2026 @ 11:03 pm
I have been trying for several days to configure a vbulletin server to use SMTP mail rather than PHP mail because I need to use Postfix rather than Sendmail as the MTA.
I was initially getting SMTP error 454 but that was becasue I'd chosen the wrong port. Once I changed that to 143 I now get an SMTP error 0 (unexpected response).
The mail log shows the connection attempt:
dovecot: imap-login: Disconnected (no auth attempts in 60 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured
Dovecot is configured to allow no auth for localhost but it doesn't matter whether I set valid credentials in the vbulletin config or not, I get the same error.
Google suggested it might be a firewall issue but the input chain has a rule to accept If input interface is lo and I have added rules for the listening ports (110/143/993/995) and the Postfix outbound port (25) without any change in the error.
I'm at a loss.