[rescue] what the hell is this?

[Kurt Huhn]

> a) what is this shit?

hmm - pr0n?  It looks like somone is trying to use your procy for
themselves - someone outside your network.

> 
> b) would i be wrong to write a script to harvest these ip addresses and put
>    them in some firewall rules blocking their god-damn access?

Not wrong, no.  It's your firewall, you do whtever you want with it. 
See below....

> 
> c) would it be worth the effort?
> 
That depends on whether they're actually getting anything via the proxy
- if they are, then they're useing up your bandwidth and getting
something from you for free (a proxied connection).  If not, then it's
just probes for an open proxy.  In this case, it might not be worth the
time and effort for you do block IPs - but that decision is entirely up
to you.

As long as your proxy is secured, you probably have nothing to worry
about...

-- 
Kurt
kurt at k-huhn.com