...and I think I've solved it. My IPTables rules had a default policy to drop Input packets. I didn't think to write a rule to explicitly allow all loopback traffic. Silly me. I appended the following lines to my rules and all applications are loading normally. iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT To those still having trouble in this thread I recommend checking your IPTables rules.