netcat not listening on desired port

Asked Feb 28 '15 at 21:23

Active Feb 28 '15 at 21:23

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When I want to listen on desired port on one server, I use netcat ie:

nc -l  8888

Then I can verify the server is actually listening on that port:

netstat -tlnp | grep 8888
tcp        0      0 0.0.0.0:8888            0.0.0.0:*               LISTEN      2984/nc
tcp6       0      0 :::8888                 :::*                    LISTEN      2984/nc

Those steps worked for centos 7, OpenVZ server. However if I perform the same steps on KVM debian 7 i can't see the server listening on port 8888. What could possibly be blocking netcat to listen on that port? Any ideas how can I debug this and get to the core problem?

asked Feb 28 '15 at 21:23

user1854959

you run netcat in the VM, and check on the host? Of course it will not work, these are two separate machines after all. – dyasny Feb 28 '15 at 22:55
no, i only have access to kvm machine. – user1854959 Feb 28 '15 at 23:11
how is the machine set up? you give no details there – dyasny Feb 28 '15 at 23:48
@dyasny what setup do you excactly mean? – user1854959 Mar 01 '15 at 08:00
The KVM machine, especially the networking part. Is it using NAT, bridge, macvtap, vmfex, ...? – dyasny Mar 01 '15 at 15:09

netcat not listening on desired port

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