Was not able to get the "road warrior" setup working at all in 5.x to 6.18, kept receiving "failed to pre-process ph2 packet." After 3-4 hours, wiping the unit configuration and moving to 6.19 started to work better. Still did not get it to work after another 5 hours. Gave up and...

i was receiving this same error after updating form 5.x to 6.18. I was trying to set up l2tp for "road warriors" as that is the "recommended" way to allow people into your network according to a few people. After wasting 3-4 hours on this same error, I wiped the configuration and...