I have the following rule set configured using UFW on Debian Jessie 8.2.0:Status: activeLogging: on (low)Default: deny (incoming), deny (outgoing)New profiles: skipTo                         Action      From--                         ------      ----20,21,22,53,80,442/tcp     ALLOW OUT   Anywhere20,21,22,53,80,442/udp     ALLOW OUT   Anywhere20,21,22,53,80,442/tcp     ALLOW OUT   Anywhere (v6)20,21,22,53,80,442/udp     ALLOW OUT   Anywhere (v6)When I disable UFW, web browsing in Iceweasel works correctly. Once enabled, it appears to be blocking all web traffic. I have tried accessing web pages utilizing the IP address retrieved via PING - to no avail.My understanding is that the set rules are exceptions to the deny (outgoing). Hence, port 53 should allow the DNS request, while 80 and 443 subsequently allow HTTP and HTTPS traffic.I was utilizing this exact same rule set on another Debian Jessie box, without issue.
UFW Preventing Web Browsing
debian;networking;firewall;ufw