Perlbal, Squid & X-Forwarded-For

[Kate Turner]

Hi,

We're considering trying Perlbal on our website, to load balance
between the frontend squid servers (that the users see) and the
apaches at the backend.  At the moment we use X-Forwarded-For from the
squid to know the client's real IP address (our web application
requires this); Perlbal seems to have _some_ X-F-F support, but, as
far as I can see, it ignores any X-F-F supplied by the 'client' (which
in this case is squid).

Would it be different to implement support for appending Perlbal's
client's IP to the X-F-F, and forwarding the entire thing?  E.g. if
1.2.3.4 is the client, and 10.0.0.1 is the squid, perlbal would
forward:

X-Forwarded-For: 1.2.3.4, 10.0.0.1

to the apache.  This is what we do with Pen at the moment, and it
appears to work well.

Thanks,
Kate.