Hi,

We've setup an ipsec tunnel mode VPN connecting two sites. One side is
Linux ipsec + racoon, the other is a netscreen device. It basically
works, however, TCP connections between any two hosts on the two sites
are consistently dropped every now and then (about 20min to 40min).
Our testing (ping) shows that the linux ipsec router does lose
connectivity to the Internet every now and then but each time it
recovers
in a few seconds. In principle this shouldn't affect the TCP
connections
over the tunnel, right? How would you diagnose this problem?

TIA!