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Outbound MS PPTP VPN Client error 800

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Outbound MS PPTP VPN Client error 800 - 3.Aug.2005 4:40:00 PM   
RGBroome

 

Posts: 16
Joined: 17.Jan.2005
Status: offline
Hi,

I am trying to get a client behind my firewall to connect to a MS VPN server on the internet using PPTP. I am getting an error 800 from the client. I have tried on more than one machine. One without the firewall client software. One with with it both on and off with the same error result. I have also placed and access rule for pptp from inside to outside.

Any suggestions on why my client can't communicate out. I have not yet updated the service pack level to SP1 on the isa 2004 firewall.

[ August 03, 2005, 06:56 PM: Message edited by: RGBroome ]
Post #: 1
RE: Outbound MS PPTP VPN Client error 800 - 5.Aug.2005 6:53:00 AM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi RG,

Is the client a SecureNAT?

Is there an Access Rule allowing outbound PPTP?

Is there an MTU issue?

Thanks!
Tom

(in reply to RGBroome)
Post #: 2
RE: Outbound MS PPTP VPN Client error 800 - 23.Aug.2005 3:26:00 PM   
RGBroome

 

Posts: 16
Joined: 17.Jan.2005
Status: offline
Is the client a SecureNAT?

Yes, i have tried it withough having the firewall cilent installed (This does just make it a secure nat correct?)

Is there an Access Rule allowing outbound PPTP?
Yes, there is a outbound pptp rule

Is there an MTU issue?
I don't know if there is an MTU issue, how could I test?

(in reply to RGBroome)
Post #: 3
RE: Outbound MS PPTP VPN Client error 800 - 23.Aug.2005 9:03:00 PM   
longman

 

Posts: 50
Joined: 7.Feb.2005
Status: offline
Securnat client has its default gateway set to the isa internal nic card or has a default gateway that routes to the isa server.

Once that is done you will need an anonymous outbound pptp access rule.

(in reply to RGBroome)
Post #: 4
RE: Outbound MS PPTP VPN Client error 800 - 24.Aug.2005 7:04:00 PM   
RGBroome

 

Posts: 16
Joined: 17.Jan.2005
Status: offline
Ok, so i have disabled the firewall client.
Given myself an static IP with the default gateway specified as the internal interface of the ISA server. Put a publishing rule with allow pptp from inside to outside for all users.

Still no luck? I can connect to this right away on a cable modem.

(in reply to RGBroome)
Post #: 5
RE: Outbound MS PPTP VPN Client error 800 - 24.Aug.2005 7:39:00 PM   
longman

 

Posts: 50
Joined: 7.Feb.2005
Status: offline
Have you examined the firewall logs to see if there is a rule that is denying the pptp external access?

(in reply to RGBroome)
Post #: 6
RE: Outbound MS PPTP VPN Client error 800 - 25.Aug.2005 5:57:00 PM   
RGBroome

 

Posts: 16
Joined: 17.Jan.2005
Status: offline
Ok, so without changing anything else today I gave it a try on my machine and it worked with my static ip info!

I went back to the DHCP server and set the default gateway to ISA server, and now the DHCP assigned addresses work as well.

Thanks so it was the gateway!

(in reply to RGBroome)
Post #: 7

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