How to set SSH daemon to listen on IPv4 only?

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                          Current config (reboot was also done):

    root@ubi:~# grep Port /etc/ssh/sshd_config
    Port 30000
    root@ubi:~# 
    root@ubi:~# grep ListenAddress /etc/ssh/sshd_config
    ListenAddress 0.0.0.0
    root@ubi:~# 
    root@ubi:~# netstat -tulpn|grep 30000
    tcp6       0      0 :::30000                :::*                    LISTEN      1/init              
    root@ubi:~# 
    root@ubi:~# ss -tulpn|grep 30000
    tcp   LISTEN 0      4096               *:30000            *:*    users:(("sshd",pid=38048,fd=3),("systemd",pid=1,fd=251))
    root@ubi:~# 
    root@ubi:~# grep PRETTY_NAME= /etc/os-release
    PRETTY_NAME="Ubuntu 24.04.1 LTS"
    root@ubi:~# 

Question: Is this a bug? I set sshd to listen on only IPv4, why is it listening on IPv6?
                        

Asked by peterK88 (117 rep)

Oct 16, 2024, 10:34 AM
Last activity: May 2, 2025, 09:27 PM

How to set SSH daemon to listen on IPv4 only?

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