Thursday, March 31, 2011

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Windows Cannot Ping Without Enabling ICMP

Windows 7 firewall is it just like Windows XP's  where you will not be able to ping the workstation until you enable or allow ICMP. Some tells me you can "ping right out of the box". But this is not correct. The right answer is that You won’t be able to ping without enabling ICMP.

What Is ICMP:

ICMP is the Internet Control Message Protocol.

ICMP is a complementary protocol to IP (Internet Protocol). Like IP, ICMP resides on the Network Layer of the OSI Model.

ICMP is designed for sending control and test messages across IP networks.

Unlike the Transport Layer protocols TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) which operate on top of IP, ICMP exists alongside IP.

The ability to understand ICMP is a requirement for any IP-compatible network device. However, many security devices such as firewalls block or disable all or part of ICMP functionality for security purposes.

Read More: http://www.tech-faq.com/icmp.html

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About bench3 -

Haja Peer Mohamed H, Software Engineer by profession, Author, Founder and CEO of "bench3" you can connect with me on Twitter , Facebook and also onGoogle+

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