[squid-users] why isn't Squid listening for tcpv4 connections?

Can't reach any web pages when browsers set to proxy with Squid. Squid's running but doesn't appear to be listening for tcpv4 connections. This is a default install on Ubuntu 14.04 server, sudo apt-get install squid3. Firewall is not blocking access. Here's command output showing that and apparen

[squid-users] when/who login in to proxy?

I've been able to set up digest file authentication on the Squid proxy by adding the following to squid3.conf. auth_param digest program /usr/lib/squid3/digest_file_auth -c /etc/squid3/passwordsauth_param digest realm proxyacl authenticated proxy_auth REQUIREDhttp_access allow authenticated I h