Correct me everyone if I`m wrong:
1. First - you have to get your assigned IP number ... you can do it by
"extracting" it from ifconfig message - after connecting to PPP server.
Practically you can achieve this by adding following line to your
rc.firewall script:
extip="`/sbin/ifconfig ppp0 | grep 'inet addr' | awk '{print $2}' | sed
-e 's/.*://'`"
and after that in your iptables rulesets you can use $extip as your
external IP number.
2. Now you have to "restart" rc.firewall script every time you start
your ppp connection. /etc/ppp/ip-up is the script which is always
executed after you`re connected so you simply have to add a line to it
at the begining containing:
/etc/rc.d/rc.firewall
(but of course after #!/bin/bash ;-) )
If you don't already have a /etc/ppp/ip-up sccript, you need to create
the following link to run the /etc/rc.d/rc.firewall script.
ln -s /etc/rc.d/rc.firewall /etc/ppp/ip-up
If any doubt read Linux IP Masquerade HOWTO, Chapter 6. "Other IP
Masquerade Issues and Software Support".
I hope that this will help you
Best Regards
Szymon
19-08-2002, godz. 23:03, Jose Romildo Malaquias wrote:
> Hello.
>
> I connect to the internet with a cable modem using the PPPoE
> protocol. I am in the process of configuring IP Masquerading
> in my internal network, using my Red Hat Linux 7.3 box
> as the gateway (IP MASQ server). I am following the IP
> Masquerading HOWTO, but I am having some difficult in setting
> the stronger ruleset for IPTABLE.
>
> I am noticing that the IP address I receive is not constant,
> but change even after connected to the internet. As the ruleset
> used with IPTABLE depends on this IP address, I suppose I
> have to rerun the IPTABLE ruleset after each time
> I get a new IP address. I have a /etc/rc.d/rc.firewall
> script used to set the IPTABLE ruleset, and it should be
> run every time I receive a new IP address.
>
> Attached is an excerpt from the /var/log/messages
> file (with uninteresting lines deleted) demonstrating
> the changing IP addresses.
>
> What is the correct (best) way of accomplishing this with
> RHL 7.3?
>
> Regards,
>
> Romildo
>
> --
> Prof. José Romildo Malaquias
> Departamento de Computação - Universidade Federal de Ouro Preto
> http://www.decom.ufop.br/prof/romildo/ [EMAIL PROTECTED]
> http://uber.com.br/romildo/ [EMAIL PROTECTED]
>
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You received this letter from:
Szymon Lukasik
Cracow Univ. Of Technology Student
Linux Registered User #283292
e-mail: [EMAIL PROTECTED]
www: www.szymonl.republika.pl
gg: 1925326
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