[Openswan Users] Help! - Unable to send email (exchange/mapi) with attachments from remote (VPN connected) site using WinXP

Ken Bantoft ken at xelerance.com
Mon Apr 26 18:30:27 CEST 2004

On Mon, 26 Apr 2004, Darius wrote:

> Greetings,
> We want to switch our remote office Win2K desktops to WinXP (Ok, ok - if 
> you are already jeering then please know that closed, proprietry OS's 
> are not my first choice either). Our remote offices use FreeSWAN (1.97 
> on RH 7.3) to get to an Exchange 5.5 server at our head office (where 
> Debian, RH  and snapgear(linux/FreeSWAN) are used on servers, routers). 
> All Win2K/XP desktops are using Outlook 2000 (MAPI) to communicate with 
> Exchange.
> Posting this problem here and expecting a soltion might be a longshot; 
> chances are this isn't a FreeSWAN config problem, but my testing 
> environment can't eliminate our FreeSWAN VPN setup from being part of 
> the problem at the moment. I'm hoping someone with a similar environment 
> will see this and have some constructive suggestions about how to fix 
> this problem, or diagnose the problem without replacing FreeSWAN with 
> another VPN product, or tell me that 
> WinXP/Outlook2K/Exchange5.5/FreeSWAN works for them !

Set the MTU on the Exchange server to 1400.  I've dealt with similar 
issues with Exchange - it seems the PMTU discovery breaks every other 
service pack or so.

Ken Bantoft			VP Business Development
ken at xelerance.com		Xelerance Corporation
sip://toronto.xelerance.com	http://www.xelerance.com

The future is here. It's just not evenly distributed yet. 
        -- William Gibson

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