I have a server running Apache on port 80. netstat shows it running:
# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
tcp 0 0 0.0.0.0:43257 0.0.0.0:*
LISTEN 2760/ClusterDaemon
tcp 0 0 0.0.0.0:6556 0.0.0.0:*
LISTEN 2635/xinetd
tcp 0 0 0.0.0.0:6557 0.0.0.0:*
LISTEN 2635/xinetd
tcp 0 0 :::80 :::*
LISTEN 10785/httpd
tcp 0 0 :::22 :::*
LISTEN 2600/sshd
ss -lnt does not. Notice that the sshd port is also missing.
# ss -lnt
Recv-Q Send-Q Local Address:Port Peer Address:Port
0 0 *:43257 *:*
0 0 *:6556 *:*
0 0 *:6557 *:*
It really is running; I can access port 80. Why doesn't ss show it? I
played with other options, but couldn't find anything that worked.
# ss -6ln
Recv-Q Send-Q Local Address:Port Peer Address:Port
# ss -6lnt
ss: no socket tables to show with such filter.
# ss -a6n
State Recv-Q Send-Q Local Address:Port Peer Address:Port
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