The server hosting this blog respond on all ipv4 TCP ports from 1 to 65535.
See: http://portquiz.net
The following URLs should also work if you are not filtered :
This allows you to test what TCP ports are filtered by your local network.
Command line example with netcat:
$ nc -v portquiz.net 1 Connection to portquiz.net 1 port [tcp/http-alt] succeeded! $ nc -v -w2 portquiz.net 65535 nc: connect to portquiz.net port 65535 (tcp) timed out: Operation now in progress
Under Arch Linux, your network cards are sometimes named differently between two reboot. Configuring your network connection is hard if you don’t know if you card will be called eth0 or eth1.
A file /etc/udev/rules.d/75-persistent-net-generator.rules.optional can be used to tell udev to generate persistent network rules.
It’s very simple:
mv /etc/udev/rules.d/75-persistent-net-generator.rules.optional /etc/udev/rules.d/75-persistent-net-generator.rules
Reboot your system. A /etc/udev/rules.d/70-persistent-net.rules file has been generated. Now you can disable the generator:
mv /etc/udev/rules.d/75-persistent-net-generator.rules /etc/udev/rules.d/75-persistent-net-generator.rules.optional
Link: