On Sat, 2011-04-02 at 12:15 +0530, Partha Chowdhury wrote:
My ISP is running a transparent proxy server on port 80 as I found out from this thread
http://mailman.archlinux.org/pipermail/arch-general/2011-March/019172.html
Now from last two or three days, I keep getting pop-up ads from a particular domain on every website i go to - even on text only websites ! If i choose another proxy server in firefox , then that does not appear on any site. But i normally connect to internet, that specific pop-up to a very particular website appears on every single page. If I install adblock plus in firefox, then of course no ads are displayed.
So is it possible that my ISP is serving that ad by intercepting incoming http traffic ?
Yes, proxyservers can intercept pages and modify them. I used to have a transparent squid proxy that would filter ads and replace them with a 1x1px transparent pixel. If you're paying for this internet line, I would suggest to switch to a different provider. Inserting ads in HTTP pages for a connection that is being payed for is not-done.