LinuxQuestions.org - Setting up a VPN that utilizes multiple public IPs

(edit: problem resolved!)
Alright guys, just a warning: I'm very new to this stuff.

I have already setup a VPN (and use it just as a proxy, pretty much) using pptpd on a VPS that I purchased. After some tinkering around, I was able to get it to work. However, my VPS actually has two public IPs. The etc/network/interfaces has eth0 and eth0:0. I'm currently only able to log in and use a single IP, the one that is specified under eth0.

Here are my settings. I might be providing more info than is needed, I'm quite new to this.

/etc/network/interfaces:

Code:

auto eth0

iface eth0 inet static

    address 199.***.***.113

    gateway 199.***.***.1

    netmask 255.255.254.0

auto eth0:0

iface eth0:0 inet static

    address 199.***.***.101

    gateway 199.***.***.1

    netmask 255.255.254.0

auto lo

iface lo inet loopback

/etc/ppp/chap-secrets:

Code:

# Secrets for authentication using CHAP

# client        server  secret                  IP addresses

testname      pptpd  testpassword      *

/etc/rc.local:

Code:

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

exit 0

Those settings work properly when I connect to 199.***.***.113 as a VPN. What I want to be able to do is to also have the option of connecting to 199.***.***.101 as a VPN and be given that IP. Is this possible?

If I try to add an iptables rule and specify eth0:0 instead of eth0, that won't work because apparently iptables does not understand aliases.

Any help is appreciated. Thanks!

edit: Assigning IPs to each user (rather than using *) under chap-secrets, and then using that ip as the source in the iptables postfoward in conjunction with -j SNAT --to-source seemed to work. Nevermind!