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telnet to test connectivity

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http://www.unix.com – From a Windows command prompt, when I want to test whether an IP and port is open to a connection I can use telnet: Code: telnet 1.2.3.4 5050 ..tests whether I can connect to port 50 on host 1.2.3.4. What is the correct context to do a similar test from an AIX console? Thanks! (HowTos)

Shoutmeloud's picture
Submitted by Shoutmeloud on 03/22/2012 – Made popular on 03/22/2012

Stories similar to telnet to test connectivity

so... we know that we can test that if a port is open on the firewall with:

telnet SERVERIP PORT

..but afaik there are services that can't be tested with telnet, because ex.: telnet doesn't know that protocol that the service is using, and telnet will report that the port is closed, but in reality the service is up&running.

Q: first: was I correct about telnet?

telnet with a certain route 1 year 11 weeks ago

OS : *NIX Shell : any

I want to test telnet for a certain port on a certain machine, but via a VIP which is in front of that machine. Basically I want to follow the same route as the application does.

script for telnet 2 years 43 weeks ago

I want to create script wherein it will check the application if its running. The command that I'll be using to check the application is telnet (if you can recommend others, that's ok).

I've an application and it is listening to port 1808. If I do telnet localhost 1808, the response is :

Code: [root@test ~]# telnet localhost 1808 Trying 127.0.0.1...

Proxy via Telnet 35 weeks 3 days ago

I know telnet is insecure and all, but I'm stuck using it because ssh is blocked. I know how to setup ssh to bind the connection to a local port, is there a way to do this with telnet? For example, if I am using an ssh connection, I would bind it to port 999 like this:

ssh -D 999 user@domain.com -N -C

I've tried using the -b command in linux, but to no avail.

i migrate a ejabberd server to a vm with only private ip.

I am trying to run though the qmailrocks setup on a centos 5.5 and I am running into an issue when trying to telnet to port 25: telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. Connection closed by foreign host.

Everything else seems to be working (telnet to 110), and I turned off the firewall entirely, but I still cannot telnet to

I configured a DNS service using bind. It works and I created a domain named test.com . The problem is not in how I configured bind, I already have a positive feedback: I tested it using dig, which returns 192.168.13.3 if I ask the IP address of mail.test.com .

I am doing telnet to windows host from Linux to list Check_mk_agent data. but its giving me following output.

[root@myhost ~]# telnet winhost 6556 Trying 130.23.45.1... telnet: connect to address 130.23.45.1: Connection refused telnet: Unable to connect to remote host: Connection refused

Am I missing anything to set up? Please help.

Hi,

I am trying to set up a dev environment and I have Ubuntu server (10.16.1.92) and a CentOS VM (10.16.3.235) on this. On the CentOS I have a program running on port 5433.