[ale] VTUN Tunnels

[cfowler at outpostsentinel.com (Chris Fowler)]

I running some vtund tunnels using ppp.  If there is an extended period
of time that no traffic goes through the tunnels die.  PPPD is still
running and it appears that it is working.  But no packets travel
through the tunnels.

I fix this problem like this:

(while [ 1 ]; do ping -c 1 gateway 1>/dev/null 2>/dev/null; sleep 30;
done) &

It seems that that little bit of traffic seems to keep the tunnels
functioning.  Does anyone know why this happens?

Chris