/usr/share/grc/conf.ifconfig is in grc 1.11.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # ipv4
regexp=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}
colours=bold green
=======
# ipv6
regexp=\b[0-9a-fA-F]{1,4}(\:\:?[0-9a-fA-F]{1,4})+
colours=bold green
=======
# hwaddr
regexp=(\d|[a-f]){2}(\:(\d|[a-f]){2}){5}
colours=yellow
=======
# size
regexp=\d+(\.\d+)?\s(T|G|M|K|)i?B
colours=yellow
=======
# interface
regexp=^([a-z0-9]{2,}\d*):?\s
colours=bold green
=======
#ip disc
regexp=(inet6?|netmask|broadcast)
colours=cyan
=======
#flags
regexp=(?<=[,<])[^,]+?(?=[,>])
colours=blue
=======
# mtu
regexp=(?i)mtu(\s|\:)\d+
colours=green
=======
#errors
regexp=errors(\s|\:)\d+
colours=red
=======
regexp=dropped(\s|\:)\d+
colours=white
=======
regexp=overruns(\s|\:)\d+
colours=green
=======
regexp=frame(\s|\:)\d+
colours=white
=======
regexp=carrier(\s|\:)\d+
colours=cyan
=======
regexp=collisions(\s|\:)\d+
colours=red
|