/etc/ax25/ax25mond.conf is in ax25-apps 0.0.8-rc4-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Create an internet socket on port 1234 and transmit the whole
# AX.25 traffic
rxtx *:1234
|