I'm working for a small ISP and I'm trying to figure out how I can add a frame window to all websites that all users on our network see, so that we can promote faster speeds / notify users of downtime. I've seen this done by some ISPs, where they add a frame at the top of a website that you can opt out of, and I'm curious to know how this could be accomplished. So far, my best guess is that:
- Some sort of proxy system (SQUID?) is involved that rewrites HTML or appends to html code as it comes through
- -or- Some sort of firewall system handles the traffic
- -or- Something like an actual web proxy handles everything. (Apache's mod_proxy?)
- -or- A captive portal?
Is there any kind of automated solution for all this? Also, are there open source projects that might accomplish something like this? I saw PacketFence, but I'm not looking to authenticate end users.
I want a NON-PERMANENT solution, something that can occur temporarily. I don't want to permanently add a bar to the top of everyone's website.