cannot access port 3202

[Victor Hugo Cortes]

When attempt to use the commando: telnet hostname 3202, shows the message to me:
conection refused, although the hostname is to if same.

If I do not use ports connection telnet it even presents/displays without problems or if I add the port number 23 too.

Can somebody help me please?

[Con O'Kelly]

Hi Victor

Most likely there is no service listening on port 3202, hence your connection is refused.
Do you know what service you expect to be listening on this port?

On the server you are trying to connect to port 3202, you can run the following commands to check services listening on a specific port:
# netstat -a | grep ".3202 "

or if you have lsof installed use:
# lsof -i | grep ".3202 "

Cheers
Con

[Michael Tully]

lsof is the best tool, athough netstat can provide some information.

# lsof -i tcp:3202
# lsof -i udp:3202

[T G Manikandan]

What application are u running on that port.
With no application it has this response.

If you are running a web server on that port,check whether the web server or the service assigned for that port is running.

[Victor Hugo Cortes]

Thanks to answer my call so soon, send to you my commentaries:


The application that asks for port 3202 is SAP and it is used to provide the connection of the graphic environment user, but the servant rejects the connection and when I proving the telnet assigning a number of port in another server, this works without problems.

When executing the commando netstat - a | grep 3202, non receipt any type of information, think that I do not have listen those ports although they exist in the /etc/services. Lamentably I do not have installed lsof, some other suggestion?

[Victor Hugo Cortes]

This is the output that originates the commando netstat - a | grep 3202 in a servant who if this working in normal form, can help me to interpret it and in its case of raising the faltantes services?


udp4 0 0 loopback.39764 loopback.3202
udp4 0 0 *.3202 *.*
udp4 0 0 loopback.33991 loopback.3202
udp4 0 0 loopback.33993 loopback.3202
udp4 0 0 loopback.33995 loopback.3202
udp4 0 0 loopback.33997 loopback.3202
udp4 0 0 loopback.33998 loopback.3202
udp4 0 0 loopback.33999 loopback.3202
udp4 0 0 loopback.34000 loopback.3202
udp4 0 0 loopback.34001 loopback.3202
udp4 0 0 loopback.34002 loopback.3202
udp4 0 0 loopback.34003 loopback.3202
udp4 0 0 loopback.34004 loopback.3202
udp4 0 0 loopback.34005 loopback.3202
udp4 0 0 loopback.34009 loopback.3202

[KapilRaj]

This is a socket address. The server listens on port 3202 on 127.0.01 and client (here it is local) aplication get's a dynamically allocated socket number to for a socket. udp4 says this connectins are UDP.

"udp4 0 0 loopback.33991 loopback.3202"

Regds,

Kaps

[Victor Hugo Cortes]

Hello That so:
I follow with the problem of the ports, now even in some other services defined in the /etc/services, Somebody can support to me?