I am doing telnet as
telnet www.google.com 80 It is showing Trying 216.58.193.164....Nothing happens after that. but when I tried
telnet www.google.com 443 It works well and shows
Trying 216.58.193.68... Connected to www.google.com. Escape character is '^]'. My all outbound ports are open. Then what can be the reasons for this problem?
What error symptoms do you see? When I issue that command, I see this:
% telnet www.google.com 80 Trying 216.58.218.164... Connected to www.google.com. Escape character is '^]'. That is correct behavior. The HTTP client must issue a command at this point in the protocol. If you type:
GET / HTTP/1.1 Connection: close Host: www.google.com And hit "return" twice, you will see HTML sent by www.google.com
connection timed outafter a while, your firewall ports are not as open as you might think. If this is a corporate environment, there might be a stateful packet inspection going on and telnet is not allowed in most everywhere I have been, in the past few years.