Re: Outbound IP with aliases

Hey AT, I had this exact same problem as well.

I'm not 100% certain what it was that actually fixed this, but the 
following is my pptpd.conf file

option /etc/ppp/options.pptpd
logwtmp
localip 10.101.0.1
remoteip 10.101.0.2-102
listen 100.100.100.100

and options.pptpd

name vpn
passive
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
ms-dns 1.1.1.1
ms-dns 2.2.2.2
lock
nobsdcomp
novj
novjccomp
nologfd

I had a thread that should be in the archives going over this problem 
along with responses from people on the list. The pptpd is supposed to 
check to see what port/ip combination was used as the inbound connection 
and then source responses from that address.

This also wasn't happening for me, along with some other weird things, 
logs and stuff are in the archive.

If you DO figure out what's going on I'd quite like to find out as well, 
but for now yo umay find the above config helps.

I had to disable the encryption used with ms-chap-v2 (mppe-128) not due 
to this problem but as one of my devices doesn't support it :-/ yay 
samsung !

Obviously change IP addresses to suit.

-- 
Steve.


On 18/09/2011 6:21 AM, AT wrote:
> Dear experts,
>
> I have a dedicated server with single eth0 interface and four IPs
> bound to it using IP aliases.
> Poptop is configured to listen to all available IPs.
>
> Even though clients can successfully connect to any server IP address
> (including ip-aliased addresses)
> all the requests to the target servers appear to be going from the
> main server IP address.
>
> I naively expected that if the PPTP client connects to the ip-aliased address
> the PPTP server should use the same address for the communication with
> the target server.
> What should I do to make it work like this? Can this be done with
> iptables rules?
>
> My configuration is pretty much standard.
>
> /etc/pptpd.conf contents:
> localip 192.168.99.1
> remoteip 192.168.99.10-100
>
> /etc/ppp/options.pptpd contents
> name pptpd
>   refuse-pap
>   refuse-chap
>   refuse-mschap
> require-mschap-v2
> require-mppe-128
> ms-dns 208.67.222.222
> ms-dns 208.67.220.220
> debug
> dump
> lock
> nobsdcomp
> novj
> novjccomp
> nologfd
>
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