block port 80 incomming

[lance bermudez]

how do i block port 80 (internet) that comes in so users will quit changing proxy settings. I know the easyest wasy would be to do it from the router but this is for a laptop.

ufw deny in 80
Rule updated
Rule added (v6)
Status: active
To Action From
-- ------ ----
80 DENY Anywhere
80 DENY Anywhere (v6)

but firefox can still get to google with out the proxy setting even added

Status: active
To Action From
-- ------ ----
80 DENY Anywhere
Anywhere ALLOW 10.18.12.17 8080
Anywhere ALLOW 10.18.12.17 3128
Anywhere ALLOW 10.18.12.17 80
80 DENY Anywhere (v6)

80 DENY OUT Anywhere
80 DENY OUT Anywhere (v6)


my proxy is at 10.18.12.17 8080 put the port 80 keeps working even with out the proxy settings. How ever if i close the outging port 80 then nothing works even with the proxy settings.

[aktiwers]

http://www.cyberciti.biz/faq/iptables-block-port/