[strongSwan] Can't connect to peer network(showing INVALID_SYNTAX error)

[Tobias Brunner]

Hi,

> generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH SA TSi TSr
> N(EAP_ONLY) ]
> sending packet: from 159.*.*.*[500] to 4.*.*.*[500] (220 bytes)
> received packet: from 4.*.*.*[500] to 159.*.*.*[500] (68 bytes)
> parsed IKE_AUTH response 1 [ N(INVAL_SYN) ]
> *received INVALID_SYNTAX notify error*
> establishing connection 'net-net' failed

Apparently, the other end doesn't like the IKE_AUTH request for some
reason.  Check the log there for details.

Regards,
Tobias