On 09/16/11 02:29, Giacomo Di Ciocco wrote:
Hello Everyone,
I had two guests using IPSEC VPN unable to connect to their exchange
servers while connected to their company VPN, when using the old router,
a linux machine doing outbound NAT, they were not experiencing this; one
of these guests experiences such problem also from its home ADSL link.
Apart from the protocol specific problem mentioned above their VPN is
working fine.
I'm asking you because I cannot figure how there can be different
behaviours for the "same" type of traffic (it is encrypted!).
I'm using AON with lan->wan rule for port 500 and after that i have a
global lan->wan rule.
Thank you,
Giacomo.
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How is the client machine setup?
Is the VPN connection considered their default Internet route when
connected?
Are their DNS servers replaced by VPN supplied parameters?
Where is Exchange in the network in relation to the VPN at their company
HQ? Is it behind a NAT with private IP addresses? Or is it in front of a
NAT with public ip addresses(with the VPN endpoint on the LAN side of
the NAT)?
Lots of things that can effect connectivity and we have no way to know
any/all of these and any other network factors that we have no knowledge
about. And these are just the questions, I can think of in less than 5
minutes.
Lyle Giese
LCR Computer Services, Inc.
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