Ipsec tunnel with Palo alto

[MartinLangmaid]

Perhaps this will help:

IPSEC tunnel with Palo Alto firewall

I thought I’d share this experience I have just had with a tunnel from an HD4 to a Palo Alto firewall device. On matching up settings I found the tunnel established no issue and no errors but traffic would not pass through the tunnel, various things were tried (usual NAT-T enable etc) but to no avail. After some time and troubleshooting I found that changing the phase1 and 2 settings down resolved the issue despite the fact the tunnel came up with no errors (on both sides) Originally I had th…