Sven, I have had this issue with the watchguards for years. The only way I have found to fix the problem consistently is to change the gateway IP address on the netscreen and then change it back to the correct one. This creates a new SA and therefore allows the tunnel to come up. I have spent hours trying to figure out another ways and it has always been restart the watchguard or do this.
Hope it helps. Jeremy ----- Original Message ----- From: "Sven Juergensen (KielNET)" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, December 11, 2007 7:30 AM Subject: [j-nsp] Watchguard <-> SSG550M VPN > Hi list, > > trying to establish a VPN between > a watchguard firebox x15edge and > a ssg550m (5.4.0r4.0) initially > works fine but upon clearing the > sa or rekeying after the lifetime > expired, the sa doesn't get established > again. log snippet as follows: > > ---8<--- > [Root]system-information-00536: Rejected an IKE packet on ethernet0/2.3 > from x.x.x.x:500 to y.y.y.y:500 with cookies 59b9f3df2b0c0e01 and > c99876e8613542c8 because an unencrypted packet unexpectedly arrived. > --->8--- > [...] > ---8<--- > [Root]system-information-00536: Rejected an IKE packet on ethernet0/2.3 > from 89.27.129.9:500 to 80.152.236.73:500 with cookies 16d0c2ee794dc2d6 > and 73c55fd1a153bb0e because the IKE INFO exchange mode hash payload was > invalid. > --->8--- > > did anyone experience something > like this before? my guess is > an interop issue but watchguard > isn't that new in the field so > i'm kind of puzzled. > > any pointers appreciated. > > best regards, > > sven03 > > > Mit freundlichen Gruessen > > i. A. Sven Juergensen > > -- > Fachbereich > Informationstechnologie > > KielNET GmbH > Gesellschaft fuer Kommunikation > Preusserstr. 1-9, 24105 Kiel > > Telefon : 0431 / 2219-053 > Telefax : 0431 / 2219-005 > E-Mail : [EMAIL PROTECTED] > Internet: http://www.kielnet.de > > AS# 25295 > Key fingerprint: > 65B6 90FC 010A 39CE DCA5 336D 9C45 3B7A B02D E132 > > Geschaeftsfuehrer Eberhard Schmidt > HRB 4499 (Amtsgericht Kiel) > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp

