My apache is listening for *.80 and *.443 connections. And it works fine:
** root@syslog-ng ** /etc ** Mon Nov 07 13:33:51
# telnet 127.0.0.1 80
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<!--
Modified from the Debian original for Ubuntu
Last updated: 2014-03-19
See: https://launchpad.net/bugs/1288690
-->
...
Why do the listen sockets only appear as tcp6?
** root@syslog-ng ** /etc ** Mon Nov 07 14:18:51
# netstat -nat | grep LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN
tcp6 0 0 :::80 :::* LISTEN
tcp6 0 0 :::22 :::* LISTEN
tcp6 0 0 ::1:5432 :::* LISTEN
tcp6 0 0 :::25 :::* LISTEN
tcp6 0 0 ::1:6010 :::* LISTEN
tcp6 0 0 :::443 :::* LISTEN
Ubuntu version: 3.13.0-100-generic #147-Ubuntu SMP
apache version: 2.4.7 (Ubuntu)
sudo netstat -lntwill show, for example, this:tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN. On yourGRUB_CMDLINE_LINUX_DEFAULT=line add thisipv6.disable=1