[isalist] Re: ISA 2004 > SSL-VPN > Terminal Services

http://www.ISAserver.org
-------------------------------------------------------

Is the Sonicwall using PPTP or IPSec?
For IPSec, only IPSec NAT-T can pass through a NAT path, such as a default ISA 
installation.
PPTP has no such limitation, _but_ if the Sonicwall or the client misuse the 
PPTP protocol, the ISA PPTP filter will break the connection.

Tom; surely you're not siuggesting that he disable PMTU discovery?  That's 
exactly what the article instructs...
If this is a clean ISA 2006 installation, you _shouldn't_ have to mess with 
that value, since ISA stopped messing with it as of SP3 (includes ISA 20006).  
If you do a live search for "isa enablepmtudiscovery", you'll find lots of 
blogs, articles, etc. that discuss this one.

Jim
________________________________________
From: isalist-bounce@xxxxxxxxxxxxx [isalist-bounce@xxxxxxxxxxxxx] On Behalf Of 
Thomas W Shinder [tshinder@xxxxxxxxxxx]
Sent: Tuesday, October 09, 2007 4:39 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA 2004 > SSL-VPN > Terminal Services

http://www.ISAserver.org
-------------------------------------------------------

Hi Joseph,

By default, fragmented packets are allowed, however you do have the
option to block them.

You can also enable PMTU discovery on the ISA Firewall by configuring
the Registry

http://www.microsoft.com/technet/community/columns/cableguy/cg0704.mspx

HTH,
Tom

Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- Microsoft Firewalls (ISA)



> -----Original Message-----
> From: isalist-bounce@xxxxxxxxxxxxx
> [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of ISA
> Sent: Monday, October 08, 2007 2:11 PM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] ISA 2004 > SSL-VPN > Terminal Services
>
> http://www.ISAserver.org
> -------------------------------------------------------
>
> I have an ISA 2004 in front of an SSL-VPN (SonicWall) box for the
> purposes of publishing Terminal Services and File Shares.
>
> However, when I called SonicWall Tech support to report that the TS
> sessions were terminating with "Internal Protocol Error"
> messages - they
> asked me to check: 1) the MTU limits and 2) If I'm allowing fragmented
> packets.
>
> Can someone please tell me how I can check that on the ISA server?
>
> I greatly appreciate the help.
>
> Joseph Danielsen
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