Hi,
I am in the process of setting up ZLB for our spam filtering platform. This has
certain requirements as in the real server must see the original sender's IP
not the load balancer's IP so I have it set up in DNAT.
The real server must also be able to get out to the Internet to run DNS,
Blacklist and other queries.
I've been running around in circles on google trying to find out how to get the
load balancer to allow outbound traffic but all I get is references to having
to set up iptables using this command:
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
Thing is, that means that traffic out goes from the local IP of the load
balancer and not the virtual IP that traffic comes in from. The iptables rule
doesn't work for the virtual interfaces with a rule such as this:
iptables -t nat -A POSTROUTING -o eth0:1 -j MASQUERADE
I've also found that rules added to iptables don't show up with iptables -L
which is a bit odd to me. I have to reboot to clear the rules every time I want
to test which seems a bit excessive.
All the best,
Colin Waring.
[cid:[email protected]]
Colin Waring
Technical Director
Dolphin ICT Limited
T
+44 (0)151 438 2246
www.dolphinict.co.uk<http://www.dolphinict.co.uk>
[email protected]<mailto:[email protected]>
US15a, Armstrong House, First Avenue, Robin Hood Airport, Doncaster, DN9 3GA
[cid:[email protected]]<http://www.linkedin.com/company/dolphin-ict>
Dolphin ICT Limited. NOTICE & DISCLAIMER
Dolphin ICT Limited, a private limited company, with company registration
number 6206916,
registered in the United Kingdom, the registered office of which is at US15a,
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