I have 1 main site (London) where the DC and Exchange server is and 1 satellite site (Colchester).
In each site the local network goes through a Sonicwall TZ 170 Standard Firewall which goes through a Draytek 2600 Plus. A VPN connection is configured at the London Site to connect to Colchester.
A Firmware upgrade was performed on the Draytek router at Colchester. SInce then Colchester cannot connect to the London site for authentication or email. They do have Internet access though.
Both Sonicwall devices are advising various messages in the log: IKE IKE negotiation aborted due to timeout, THEN > IKE Responder: Received Main Mode request (Phase 1) (from London) THEN> IKE Responder: No response - remote party timeout THEN > Received packet retransmission. Drop duplicate packet (London)
Is there anything in thr Draytek which would block access to the VPN ie passtrhough as this is the only thing that has been changed?
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Is this in the Remote Access Control Setup?
The following options are ticked:
Enable PPTP VPN Service
Enable IPSec VPN Service
Enable L2TP VPN Service
I have already tried deselecting these but still did not work. I have also tried setting up the DMZ as the local Sonicwall IP in Advanced Setup > NAT Setup > DMZ Host Setup as suggested but still nothing...
you don't need services
take a look here http://www.support.draytek
Turns out the problem was due to the Firmware upgrade version. Although VPN should be passed through (basically just a modem) this is not the case. I had to update the VPN on SonicsWall to point to the public address of the Draytek Router rather than the public address of the Sonicwall Firewall.
Strange but worked. Thanks for your help
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by: from_expPosted on 2008-02-07 at 04:57:23ID: 20840289
have you allowed vpn pass through on your draytek?