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telnet port 80

Try to telnet a web server located in a LAN: telnet 80 but it failed.

I tried this even on the server itself, i.e., on the server, telnet 80 and it still failed.

What is wrong and how to resolve it?

Thanks to help.



Re: telnet port 80

Are you getting any response back?

Using telnet to connect to port 80 on a Web server should establish a TCP session, and you will see something like this:

HTTP/1.0 404 R

Content-Type: text/html

Can you connect to the Web server with a browser?

Community Member

Re: telnet port 80

Thanks for the reply. First, there is no web site running yet. Second I issued the: telnet 80 on the same machine (not from a different PC). The message reads: "Could not open connection to the host, on port 80, connect failed."

But when I tried:telnet 5560 (which is port to access the database's isqlplus), the response is a new blank screen with nothing on it (at least it does not display any error message).

No clue why can not connect to the port 80 even on the same machine?

Thanks to help


Hall of Fame Super Gold

Re: telnet port 80


If you say that there is no web site running yet, are you sure that the server is actually listening on port 80 yet?

It sounds to me like the server may not have started the service yet to serve up web pages. Is there some way that you can confirm whether it has opened port 80 for listening?



Community Member

Re: telnet port 80

Maybe this can work...

X:\>netstat ?

Displays protocol statistics and current TCP/IP network connections.

NETSTAT [-a] [-b] [-e] [-n] [-o] [-p proto] [-r] [-s] [-v] [interval]

-a Displays all connections and listening ports.

-b Displays the executable involved in creating each connection or

listening port. In some cases well-known executables host

multiple independent components, and in these cases the

sequence of components involved in creating the connection

or listening port is displayed. In this case the executable

name is in [] at the bottom, on top is the component it called,

and so forth until TCP/IP was reached. Note that this option

can be time-consuming and will fail unless you have sufficient


-e Displays Ethernet statistics. This may be combined with the -s


-n Displays addresses and port numbers in numerical form.

-o Displays the owning process ID associated with each connection.

-p proto Shows connections for the protocol specified by proto; proto

may be any of: TCP, UDP, TCPv6, or UDPv6. If used with the -s

option to display per-protocol statistics, proto may be any of:

IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, or UDPv6.

-r Displays the routing table.

-s Displays per-protocol statistics. By default, statistics are

shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6;

the -p option may be used to specify a subset of the default.

-v When used in conjunction with -b, will display sequence of

components involved in creating the connection or listening

port for all executables.

interval Redisplays selected statistics, pausing interval seconds

between each display. Press CTRL+C to stop redisplaying

statistics. If omitted, netstat will print the current

configuration information once.

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