how to check if certain ports are blocked by isp

To know whether any of your ports are blocked by ISP(Internet Service Provider) or firewall, there are some simple tools available in the internet. Generally ports are blocked by ISP or firewall to avoid viruses and spam. The following are some of the tools:

<http://www.canyouseeme.org/ >

http://www.portchecktool.com/

If you follow one of the above links, you can know whether any of your ports are blocked by ISP(Internet Service Provider) or firewall.

quick links