Facebook bypasses my firewall
by lucmove from LinuxQuestions.org on (#4W879)
I am flummoxed. I run this script when I want to block my Internet connection:
#!/bin/bash
iptables -F
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
Everything stops. I can't check my email, I can't ping any address at all and I can't open any site... except Facebook. Facebook keeps opening as if noothing had happened. The Messenger won't work, but all other pages still open, even pages I don't think I ever opened before so they can't be cached.
Or can they? I just tested it here, on linuxquestions, and I can open and read threads I had never opened until now. Many of them. Does Firefox read all those posts and cache them preemptively?
I am posting this with firewall blocked. Let's see if it goes through...
#!/bin/bash
iptables -F
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
Everything stops. I can't check my email, I can't ping any address at all and I can't open any site... except Facebook. Facebook keeps opening as if noothing had happened. The Messenger won't work, but all other pages still open, even pages I don't think I ever opened before so they can't be cached.
Or can they? I just tested it here, on linuxquestions, and I can open and read threads I had never opened until now. Many of them. Does Firefox read all those posts and cache them preemptively?
I am posting this with firewall blocked. Let's see if it goes through...