Changing Exim SMTP IP Address

[madcow774]

I know I can change the IP address that exim uses to send mail by changing the following in my exim.conf

remote_smtp:
driver = smtp

to:

remote_smtp:
driver = smtp
interface = 123.123.123.123

But the problem is that the change gets overwritten with cpanel updates. So I had been using the following solution, which worked perfect until I upgraded to cpanel 11
http://forums.cpanel.net/showpost.ph...0&postcount=15

Why does the above solution no longer work? Is there another way to change the outbound IP for exim from within the configuration editor in WHM so it does not get overwritten?

[TheStarKillers]

Anyone have a solution?

[TheStarKillers]

So is this impossible now?

[norelidd]

don't change it in exim.conf directly, but change it int he advanced exim editor in the first box available

[TheStarKillers]

That is how it was done previously (except the first box part), but that no longer works.

[madaboutlinux]

Here's the iptable rule if other solution won't help you :-
iptables -t nat -A postrouting -o eth0 -p tcp -j SNAT --dport 25 --to-source xx.xx.xx.xx

where,
xx is the new ip on your server from where you will route your emails from.

Then execute :-
service iptables save
service iptables restart

Also you can check whether the rule is added properly or not by :-
iptables -t nat -n -L

[hostmedic]

Shekhar -

I think this is the preferred method...

If for any reason someone makes some changes to the exim config - they install Chirpy's mail scanner - or ASSP - or who knows what -

they may not realize what the other settings were for - may forget another tech put them into place etc.



Good Stuff (and hey I learned something today :-) )

[TheStarKillers]

When I try to run the iptables command, it returns:

iptables: No chain/target/match by that name

[madaboutlinux]

You seems to be on a VPS server where iptable modules isn't installed for your server. Contact your hosting provider and ask them to install it for you. Its just an entry in the conf file of your VPS.

If its a dedicated server, then ask someone to look into it. If I am not mistaken you need to recompile kernel with the missing iptable modules.

[TheStarKillers]

It is a dedicated.

If its a dedicated server, then ask someone to look into it. If I am not mistaken you need to recompile kernel with the missing iptable modules.

The kernel is compiled the way cPanel compiles it, though I think I am one version behind - I'll do a reboot tonight and see if the new version has it. If that doesn't do it, I'll recompile the kernel myself and include all the iptables modules.

[hostmedic]

I don't believe I am off my rocker here -

cPanel does not recompile your kernel.

I would suggest peeking here for a how-to

http://www.eth0.us/taxonomy/term/12

[hostmedic]

In most Linux installs iptables has become a standard option, especially Red Hat. There is a very good chance that iptables is already installed on your machine.
Check by:

1. Opening a terminal window (making sure to be logged in as root).

2. Typing: # iptables

3. If iptables is installed, you should get the following message:

iptables v1.2.8: no command specified
Try 'iptables -h' or 'iptables --help' for more information
4. If this message does not appear, then follow the directions in this link to install iptables.


http://www.cae.wisc.edu/site/public/...les-installing

[TheStarKillers]

I don't believe I am off my rocker here -

cPanel does not recompile your kernel.

Well some software does, perhaps yum. One thing is for certain, something that is installed on the box and comes with fairly default software does compile the kernel.

I would suggest peeking here for a how-to

http://www.eth0.us/taxonomy/term/12

No need for a how-to, I am aware of how to compile a kernel.

iptables is installed, I am running CentOS (and kernel will be 2.6.9-55.0.2.EL after the reboot tonight), but according to Shekhar it is missing one of the modules.

[hostmedic]

yum can download a new kernel for you - personally I do not just allow anything to just randomly update my kernels - but I have a few things compiled directly into the kernel for iptables and such so they cannot be undone :-)

My suggestion would be to double check the iptables install -
I am not sure if your missing iptables - and doubt its just a module of iptables

what happens when you type: iptables -V


Also - iptables is here: http://www.netfilter.org/projects/iptablesl if that helps

:-)

With a little bit of diligence I am sure we can help you along

[TheStarKillers]

I read on these forums some time ago that it is better to let yum upgrade your kernel to the correct version than upgrade the kernel each time yourself, I am not sure if that still holds true.

I do have iptables installed, APF is just a front-end and it runs fine. The version command returns: iptables v1.2.11. If this reboot tonight doesn't fix the problem, I will recompile the kernel myself and include all iptables modules.