Monthly Archives: February 2012

Required Network Ports for AD

Here is a listing of the port requirements for Active Directory domain, as well as optional ports: Required Ports Port No. Protocol Used by Required for 1024-5000 TCP/UDP RPC (dynamic response ports) required for RPC to respond to communications 135 … Continue reading

Posted in Windows | Tagged

Cisco IOS emulator (open source project)

I have used Dynamips Cisco IOS emulator (open source) on early days of my Cisco certification preparation labs. Recently found GNS3 site ( that provides complementary simulation tools for Dynampps including sample labs and tutorials. Hope this is informative for … Continue reading

Posted in Cisco | Tagged

Force visitors to https

We often see following error message when we visit secure sites. “The page you are trying to access is secured with Secure Sockets Layer (SSL)” IIS6 or later versions has more than 50 error codes that you can play with … Continue reading

Posted in Windows | Tagged

Enable IP Packet Forwarding

TCP/IP forwarding is not enabled in Windows by Default, this setting can be used to enable TCP/IP forwarding for all network connections (eg. different sub-net with duel NIC) and used by the computer. Create a new DWORD value¬† or modify … Continue reading

Posted in Others | Tagged