-Sounds like employees at the ISP have access to those servers, and by
extension, could get into your network.
-Many ISPs have "service" networks for backups and management - what if a
server on the same backup segment has a virus and infects your machine and then
jumps into your corporate address space?
-Unless the load balancers are doing some sort of filtering, it seems that the
machines are being touched -- The load balancers basically deciding WHICH
machine will be accessed, and pass everything, such as through the injection
attempts, to the web server behind it....
----- Original Message ----
From: "dan.tesch@comcast.net" <dan.tesch@comcast.net>
To: pen-test@securityfocus.com
Sent: Tuesday, January 22, 2008 10:05:28 AM
Subject: Question re: load balancers as a security device
I'm new to a company that has a large number of sites parked on
managed
servers at a hosting facility - the servers, firewalls and
load
balancers are exclusive to our use but managed by the ISP.
In reviewing our site design I have seen that the VPN between our
LAN
and the hosting facility permits all IP traffic in both directions
-
effectively making these public facing servers part of our LAN in
my
opinion.
For obvious reasons I'm looking to change this. Nobody is
lobbying
against the change but a senior developer that was involved in
the
original design points out that because of the load balancers in front of
the
servers, the world at large is not able to touch the machines and
thus
the potential for compromise is limited.
Could I get some comments from this community about how vulnerable
or
not this type of setup might be? I'm looking for specific info
related
to the load balancers not commentary about the corporate LAN in
this
situation - even if the combination of the firewalls and load
balancers
provide 99.9% protection I think it is a bad idea and would most
likely
not pass PCI scrutiny.
Thanks
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