Hello Rob et al,
My Raspberry Pi is behing own TL-MR3420 router.
When I ran ripd44 for the very first time it didn't worked.
Following suggestion by one of U.S. hams,
I put Pi into DMZ zone - ripd44d automagically revived!
Raspberry Pi is still in DMZ zone, proctected by very basic iptables
employing INPUT filter ONLY, to get rid of offending IP's.
Almost on a daily basis I check system log files.
Everything looks fine - so far so good.
http://www.sp2lob.ampr.org
shows equipment & services available.
Best regards.
Tom - sp2lob