Re: [Shorewall-users] Slow Exchange Server connection via PPTP

[Tom E. <te...@sh...>]

On Mon, 13 May 2002, Dragon Wood wrote:

> Sure Tom. I believe our topology is fairly standard
> (similar to your own actually). The LEAF firewall has
> 3 interfaces. eth0 is connected to our ISP via a DSL
> router. eth1 is connected to a switch to which all of
> our local LAN computers are connected to. eth2 is the
> dmz and is connected to a sever serving www etc.
> 
> The exchange server is one of the machines in the LAN
> connected to eth1 via the switch. The firewall static
> NATs one of the external IPs to the exchange server,
> and we have POP and IMAP open to the exchange server
> in rules. The Windows machine that runs the exchange
> server is also running MS PPTP, and we have rules that
> allow PPTP clients to connect to that box from the
> internet (i.e., working remotely). The slowness I
> observe is when I VPN (PPTP) to the office, and then
> use Outlook to connect to the Exchange server via the
> PPTP VPN. It takes at least 2-3 minutes to make the
> initial connection (I am using a broadband internet
> connection at home) and Outlook often times out before
> the connection is made. 
> Hope that's clearer.
>

Yes, thanks -- first check that the problem isn't DNS resolution by 
connecting to the PPTP server then trying to ping the Exchange server by 
DNS name.  

-Tom
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Tom Eastep    \ Shorewall - iptables made easy
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