Quick script to get public IPs on a NAT'd server

A quick one liner to get the public equivalent of internal IPs on a box behind NAT:

for int in $(ifconfig | grep "Link encap:" | awk '{print $1}' | grep -v 'lo'); do echo "$int: $(ifconfig $int | grep "inet addr:" | awk '{print $2}' | cut -d: -f2) => $(curl -s --interface $int ipv4.canhazip.info)"; done

I've restricted this to IPv4 only - NATing IPv6 is just silly but if you really want then it is on your head.

Example usage is as follows:

[damian@finnix ~]$ for int in $(ifconfig | grep "Link encap:" | awk '{print $1}' | grep -v 'lo'); do echo "$int: $(ifconfig $int | grep "inet addr:" | awk '{print $2}' | cut -d: -f2) => $(curl -s --interface $int ipv4.canhazip.info)"; done
br0: 10.44.200.5 => 89.242.208.82
br0:1: 10.44.200.15 => 89.242.208.82
cluevpn: 10.156.1.49 => 89.242.208.82
eth0: =>
vnet0: =>

Or if you want IPv6 addresses returned:

[damian@finnix ~]$ for int in $(ifconfig | grep "Link encap:" | awk '{print $1}' | grep -v 'lo'); do echo "$int: $(ifconfig $int | grep "inet addr:" | awk '{print $2}' | cut -d: -f2) => $(curl -s --interface $int canhazip.info)"; done
br0: 10.44.200.5 => 2001:470:9083::2
br0:1: 10.44.200.15 =>
cluevpn: 10.156.1.49 =>
eth0: =>
vnet0: =>

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