RE: NAT rules for VPN only allowing one user?

Jan:

Actually, I need the SNAT rule to make my remote
users look like they are coming from the local network.

For some reason, the Linksys does not respond to the
connection unless I have that.

Thanks,
	Neil

--
Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com
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-----Original Message-----
From: netfilter-bounceslists.netfilter.org
[mailto:netfilter-bounceslists.netfilter.org] On
Behalf Of Jan Engelhardt
Sent: Tuesday, May 29, 2007 1:13 PM
To: Neil Aggarwal
Cc: netfilterlists.netfilter.org
Subject: Re: NAT rules for VPN only allowing one user?

On May 29 2007 12:31, Neil Aggarwal wrote:

>/sbin/iptables -t nat -A POSTROUTING -o eth1 
>	-d $LINKSYS_VPN_IP -p tcp --dport 1723 
>	-j SNAT --to-source $ETH1_IP

This is redundant.

>Either one of my remote users can connect to the VPN
using
>the Windows XP VPN client.  But, if one of them is
connected
>and the other tries to connect, the second person gets
to
>the verifying username and password screen and then
>gets an Error 619 that they are not able to connect.
>
>I think somehow the existing connection is mis-routing
>the login for the second connection.
>
>Any ideas what could be going on?

Use the holy tcpdump.


	Jan
-- 

Hey,

This sounds like a problem on the VPN gateway device, you
should remove the rule:

"/sbin/iptables -t nat -A POSTROUTING -o eth1
	-d $LINKSYS_VPN_IP -p tcp --dport 1723
	-j SNAT --to-source $ETH1_IP"

And resolve that issue, what is most likely currently
happening. Your VPN router is only setup for or only
supports 1 VPN connection per IP address. So a second
connection 
would over write the first one.

Michael

Neil Aggarwal wrote:
> Jan:
> 
> Actually, I need the SNAT rule to make my remote
> users look like they are coming from the local
network.
> 
> For some reason, the Linksys does not respond to the
> connection unless I have that.
> 
> Thanks,
> 	Neil
> 
> --
> Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com
> FREE! Eliminate junk email and reclaim your inbox.
> Visit http://www.spammilter.com for details.
> 
> -----Original Message-----
> From: netfilter-bounceslists.netfilter.org
> [mailto:netfilter-bounceslists.netfilter.org] On
Behalf Of Jan Engelhardt
> Sent: Tuesday, May 29, 2007 1:13 PM
> To: Neil Aggarwal
> Cc: netfilterlists.netfilter.org
> Subject: Re: NAT rules for VPN only allowing one user?
> 
> On May 29 2007 12:31, Neil Aggarwal wrote:
> 
>> /sbin/iptables -t nat -A POSTROUTING -o eth1 
>> 	-d $LINKSYS_VPN_IP -p tcp --dport 1723 
>> 	-j SNAT --to-source $ETH1_IP
> 
> This is redundant.
> 
>> Either one of my remote users can connect to the
VPN using
>> the Windows XP VPN client.  But, if one of them is
connected
>> and the other tries to connect, the second person
gets to
>> the verifying username and password screen and
then
>> gets an Error 619 that they are not able to
connect.
>>
>> I think somehow the existing connection is
mis-routing
>> the login for the second connection.
>>
>> Any ideas what could be going on?
> 
> Use the holy tcpdump.
> 
> 
> 	Jan

-- 
Michael Gale

Red Hat Certified Engineer
Network Administrator
Pason Systems Corp.