Hello, maybe I miss something obvious, can you help troubleshoot? On a host (openSUSE Leap 15.4), not running SuSE firewall, enabled sshd and no changes to /etc/ssh/sshd_config and /etc/hosts.[allow|deny] I cannot connect to from other machines in the network: # ssh omega.swabian.net -v OpenSSH_8.4p1, OpenSSL 1.1.1l 24 Aug 2021 SUSE release 150400.7.37.1 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 20: Applying options for * debug1: Connecting to omega.swabian.net [172.18.3.1] port 22. debug1: connect to address 172.18.3.1 port 22: Connection timed out ssh: connect to host omega.swabian.net port 22: Connection timed out sshd running, not showing anything in /var/log/messages except: # systemctl status sshd.service -n100 ● sshd.service - OpenSSH Daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: disabled) Active: active (running) since Mon 2023-07-17 10:40:28 CEST; 8min ago Process: 462 ExecStartPre=/usr/sbin/sshd-gen-keys-start (code=exited, status=0/SUCCESS) Process: 465 ExecStartPre=/usr/sbin/sshd -t $SSHD_OPTS (code=exited, status=0/SUCCESS) Main PID: 467 (sshd) Tasks: 1 CGroup: /system.slice/sshd.service └─ 467 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups" Jul 17 10:40:27 omega.swabian.net systemd[1]: Starting OpenSSH Daemon... Jul 17 10:40:27 omega.swabian.net sshd-gen-keys-start[462]: Checking for missing server keys in /etc/ssh Jul 17 10:40:28 omega.swabian.net sshd[467]: Server listening on 0.0.0.0 port 22. Jul 17 10:40:28 omega.swabian.net systemd[1]: Started OpenSSH Daemon. # lsof -p 467 [...] sshd 467 root mem REG 0,45 202656 11436741 /lib64/ld-2.31.so sshd 467 root 0r CHR 1,3 0t0 4 /dev/null sshd 467 root 1u unix 0xffff9e0a19f52a80 0t0 1025089 type=STREAM sshd 467 root 2u unix 0xffff9e0a19f52a80 0t0 1025089 type=STREAM sshd 467 root 3u IPv4 1025104 0t0 TCP *:ssh (LISTEN) connecting on the host itself to itself works fine:
ssh omega.swabian.net Password:
no problems with any other host running in the local networks, can connect from/to any host. except this one. what am I missing? Regards and thanks in advance Paul