Author: Tom Kistner Date: To: Alan J. Flavell CC: Exim users list, eximusers Subject: Re: [Exim] Re: Bug#261511: exim4: possible very long delay with callout
verification
Alan J. Flavell wrote:
> That greeting looks ominously familiar - some firewall configuration
> from hell. Yup, seems to match the Cisco PIX "smtp content filtering
> hack". We had a standoff with a couple of those in the past.
Standard procedure for that equipment is to replace it with a stock
ethernet patch cable. That will roughly have the same effect in terms of
"security" but does greatly enhance standard application protocol
functionality.
To make sure the PIX cannot further multilate packets in another
network, drop it from a sufficiently high altitude (everything below 10
meters is "unsafe").
