cannot ping external IP when connected to VPN

  • Thread starter Thread starter Richard Prossor
  • Start date Start date
R

Richard Prossor

I have a web server at an external host. To connect to it as administrator I
need to be using my office IP address.

This is fine until I am working away from the office.

Then, I can connect to our office via VPN and use the internet but cannot
connect to the external server. I cannot ping the server - when I do the
name and ip is resolved but the request times out.

Any ideas?

Regards

Richard
 
we need more details to help. to access the web server, do you use a public
IP or range? Does the VPN client IP belongs to the LAN subnet?

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Hi

Seems to me that you are getting on to the Internet via your connection,
and not the gateway at the office. So the Web server is seeing your home IP
address
and thus not allowing you to conect. Try doing a tracert to see how you are
getting
onto the internet. You may have to change the settings in the VPN
configuration.
In networking and TCP/IP advanced properties check that use default gateway
on remote host is checked.

William
 
Thanks the replies

I am connecting with the use default gateway ticked and with proxy
settings in IE.

My basic set up is Microsoft Small Business Server 2000 - as per the
manual with 2 Nics etc....

Using whatismyip.com:

1) If I connect to the Internet and browse directly I get an IP from
my ISP

2) If I then VPN into my office and go to whatismyip.com, it returns
the office IP.

This is what I want and what I expect.


However if I then ping an external IP when connected via VPN - the
server resolves the address but the request times out.

I cannot connect to my external server which requires connection from
my spcified IP.

Regards

Richard
 
Is the remote client W2k/XP? If so, proxy settings are connection
specific. So to use the proxy server on the LAN from the remote, the proxy
settings need to be configured for the VPN connection.

In Internet options | Connections, select your VPN connection and click
on Settings. Enter the proxy options here.
 
Is this an ISA issue?

Do I need to set up a protocol rule to allow ping when connected via VPN?

Regards

Richard
 
That's hard to say without knowing how it is configured.

What happens when the client connects is that its default route is set
to be the VPN link (when the "use default gateway.." box is checked). See KB
254231 for a description. So the client should behave very much like a LAN
client. The exception is if the RRAS server is doing NAT for the LAN
clients.

In this case, NAT doesn't work automatically for remote clients. You
have to add the internal interface (to which the remotes connect) as a
private interface in NAT. In W2000 this requires using a netsh command. See
KB 310888 .
 
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