Change netstat local address

rallan · 12-30-2016, 09:42 AM

This must be very simple but I can't find an answer

I need to change the results of 'netstat -ta' local address to a network ip e.g.

$netstat -ta

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
..
tcp 0 0 localhost:6543 *:* LISTEN
..

*to*

$ netstat -ta

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
..
tcp 0 0 192.168.1.214:6543 *:* LISTEN
..

This needs to be done so that port 6543 is not blocked to outside traffic.

Any suggestions? Thanks in advance.

TenTenths · 12-30-2016, 10:01 AM

Code:

man netstat

And you'll find....

Code:

   --numeric , -n
       Show  numerical  addresses  instead  of trying to determine symbolic host, port or user
       names.

   --numeric-hosts
       shows numerical host addresses but does not affect  the  resolution  of  port  or  user
       names.

   --numeric-ports
       shows  numerical port numbers but does not affect the resolution of host or user names.

   --numeric-users
       shows numerical user IDs but does not affect the resolution of host or port names.

MensaWater · 12-30-2016, 10:22 AM

I suspect the OP wants to change where it is LISTENing not just see it in numeric format.

For that he'd need to run with the "-p" flag to identify the PID then look at that process to see how it gets configured to change where it LISTENs. Probably would also have to open the port in the firewall (iptables, firewalld or other) to be able to connect from other systems once he has it LISTENing on the correct interface.

I'd written more detail but LQ logged me out rather than posting it because of some odd timeout happening since yesterday.

rallan · 12-30-2016, 12:01 PM

The -p option enabled me to find out the application (i.e. mythtv) so now all I have to do is find out where it is being set! Thanks.

However if this proves difficult to discover, is there a hack which can override the initial port allocation from 'localhost' to the desired ip address?

MensaWater · 12-30-2016, 12:15 PM

I don't do MythTV myself but many do. If you do a search for "MythTV 6543" you'll find that is a default port apparently.

This post talks about a config file for MythTV so may offer some guidance:
https://ubuntuforums.org/showthread.php?t=2337481