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<font style="font-size: 10pt;"><p style="font-size: 10pt;"> At the
moment I have a VPN between a Cisco PIX (v6.3.5) and Endian Firewall (IPCop
branch). This is the fourth VPN I have run, the previous being m0n0wall and
pFsense, and an earlier version of Endian. A common problem between all of
them has been random drops in the VPN. While everywhere I look the tunnel
shows to be active, in fact no data crosses over. The first VPN I ever did
with non Cisco equip was with m0n0wall, that did remain pretty stable, only
occasionally dropping. The next pFsense last about 5-10 minutes and then all
traffic would cease, although both the PIX and pFsense reported the tunnel
as active. A week ago I got so frustrated with Endian being so unreliable I
went back and tried pFsense and m0n0wall again, with no luck. I went and
re-installed Endian, and very strangely the VPN has been up now for a week
without any interruptions. Yet I am basically using the same config. In fact
I have hardly changed anything on the PIX side except for my IP address<br>
</div><div> </div><p style="font-size: 10pt;">As I am not very
knowledgeable about IPSEC VPNs, I am curious to know what are the common
causes I may have been experienced. In other words what is generally the
problem to look at? I found personally the BSD logs of pfSense and m0n0wall
to be useless to me at least, while the Linux ones unfortunately logged
everything but the problems. <br></div><div> </div><p style="font-size:
10pt;"><br></div><div> </div><p style="font-size: 10pt;"><br>
</div></font>
Sean Waite<br><br>
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