VPN "sometimes" working.

[thefunkygibbon]

Hi,

We're having problems with one of our VPN's where it is seemingly randomly going down even though connectivity is there.

Head Office = R54 and using traditional mode vpns with 4 different sites.

problem site is safe@office 110 with latest firmware.

The errors we see in the HO CP logs are mainly

encryption failure: decrypted methods didn't match rule (VPN Error code 03)

The source ip shows it as the lan ip of the machine on the other end of the vpn if that helps.

It does seem random.

I've reset the safe@office box to factory defaults and recreated it. Changed routers. Changed NIC's in the machine on the other side.

Also i've recreated all the objects and rules relating to this vpn within the r54 firewall.

All other site to site vpns to the head office box are fine.

Anyone have any ideas?

[thefunkygibbon]

please has anyone any ideas on this ??

completely at a loss :(

[Lackie]

Make sure that Perfect Forward Secrecy is disabled on the main firewall.