Redhat Firewall issue (simple fix?)

OK, we have a consultant who handles our linux firewall/pop3 email
server. He is completely MIA and I "broke" my vpn the other day. I
had to change the ip address of my 2000 server that is running the
"routing & remote access service" and I didn't even bother to think
that it was going to mess up our VPN. My understanding is our linux
box was simply forwarding the traffic to my windows server for
authentication, etc...

I dusted off my Linux book and decided to see if I can fix it myself.
It led me to believe this setup was in the iptables. Here's where I
found that old IP address lurking.

/etc/sysconfig/iptables

*nat
:PREROUTING ACCEPT [2188028:162781738]
:POSTROUTING ACCEPT [894072:56074077]
:OUTPUT ACCEPT [957318:68464030]
-A PREROUTING -d xx.xx.xxx.xxx -p tcp -m tcp --dport 1723 -j DNAT --to-
destination "OLDADDRESS":1723
-A PREROUTING -d xx.xx.xxx.xxx -p 47 -j DNAT --to-destination
"OLDADDRESS"

I changed it to...........

-A PREROUTING -d xx.xx.xxx.xxx -p tcp -m tcp --dport 1723 -j DNAT --to-
destination "NEWADDRESS":1723
-A PREROUTING -d xx.xx.xxx.xxx -p 47 -j DNAT --to-destination
"NEWADDRESS"

I then restarted the iptables service.

Should that do it? I can't try it right now, but our CEO is heading
home in a bit and and I can have him try it. I'd just like to know
ahead of time if it may actually fix it as he's getting frustrated
with no access from home.

Thanks in advance

.

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