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Georg Schölly
Asked: 2020-02-18 04:45:01 +0800 CST

How to quickly see all sockets listening for IPv4?

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I recently learned that IPv6 sockets can also listen on IPv4 ports if /proc/sys/net/ipv6/bindv6only is enabled.

So far I have been using netstat and ss to check what sockets are listening. Since I am often only interested in IPv4 sockets, I used to use to the following command:

$ sudo ss -tulpn4

but this misses all inet6 sockets listening which also accept IPv4 peers.

Is there a convenient tool that quickly shows all sockets listening on IPv4 ports?

linux networking ipv6

0 Answers