According to SANS, tcp port 31 is often used by the "Agent 31",
"Hackers Paradise", and "Masters Paradise" trojans.
- Brian
On Sat, May 06, 2017 at 12:50:09PM -0400, lleachii--- via 44Net wrote:
<snip>...there's much more...and 31 is an
uncommon port these days for
legitimate use...