Sponsored Content
Special Forums IP Networking block telnet to specific port Post 17645 by xiamin on Tuesday 19th of March 2002 02:02:27 AM
Old 03-19-2002
block telnet to specific port

Hello All

I am running redhat linux 7.2 and would like to know how i can block telnetting to a specified port .

say for example i would like to block telnet acesses to port 80.


regards
Xiamin
 

10 More Discussions You Might Find Interesting

1. Solaris

disabled telnet now need port 23 or port 22

we disabled telnet on solaris 9 via previous a thread. We use CMS (call management system) supervisor which used port 23 (telnet). We cannot use telnet via local directive and it was shut down as stated when we shut down telnet in the inetd file. I cannot now log into the CMS box since port 23 is... (3 Replies)
Discussion started by: panzerkw
3 Replies

2. UNIX for Advanced & Expert Users

telnet on specific port??

Hi all, I have a problem. I have machine names and their IP addresses in /etc/hosts file. My application does telnet on that machine host name. The application does not uses IP address for tenet. It will fetch the host name from /etc/hosts file. Now the telnet server runs on customized port.... (6 Replies)
Discussion started by: zing_foru
6 Replies

3. Shell Programming and Scripting

Telnet IP and Port Script

Hi, I would like to create a simple script that will telnet a number of IP and Ports one after the other to confirm connectivity to those addresses. I don't need to log on, just output to a file what the response is, i.e Escape Character, connectivity refused etc. Complete newbie to... (6 Replies)
Discussion started by: asou
6 Replies

4. AIX

Telnet to port

can some one help me ? what happens when we telnet to a port ? example telnet 192.168.0.xx 1234 where 1234 is a port number Thank you (5 Replies)
Discussion started by: anwesh
5 Replies

5. Windows & DOS: Issues & Discussions

Telnet to a serial port

Hello all. I have an old computer with M$-DOS 7. I want to use it like a dumb terminal, with telnet. I need to connect it to my desktop These are my questions: How can i configure the serial port on dos? How can i telnet form dos to the serial port? How can i set up a telnet server on the... (12 Replies)
Discussion started by: mghis
12 Replies

6. Cybersecurity

Can't telnet to port 25 on the host.

Hi, we have recently setup a new UNIX server with solaris 10 and I am having issue with with SMTP/sendmail. telnet localhost 25 --- works telnet hostname.domain.com 25 -- does not work. # telnet hostname.domain.com 25 Trying 10.122.1.111... telnet: Unable to connect to remote host:... (1 Reply)
Discussion started by: esmgr
1 Replies

7. Red Hat

telnet port 23

My linux version is 2.6.18-194.e14 (Oracle enterprise linux). Could you please tell me how to enable telnet on the server. When I try to connect the server through another pc using telnet it is throwing error. Connecting To <ip address>...Could not open connection to the host, on port 23.... (3 Replies)
Discussion started by: oradba_arun
3 Replies

8. IP Networking

telnet for port 5433 is not working while it works for port 22

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. Now my problem is that I am unable to telnet this port from another Windows server whereas I can telnet port 22 from... (5 Replies)
Discussion started by: rishav
5 Replies

9. UNIX for Dummies Questions & Answers

telnet echoing 'trying ip' but no port number

Hi, Well this is probably a silly one that I should know...but I don't ! I'm telnetting to various ports from a shell script and the telnet is echoing back that it's 'trying xxx.xx.xx.xx...' but not the port number it's trying! Any help much appreciated Thanks (1 Reply)
Discussion started by: Grueben
1 Replies

10. Solaris

Block port for all except for one specific ip in Solaris11.4

Hi, I need to block ssh port 22 from all the servers except one server ip. Until solaris11.3 and below, I used to do like below(under /etc/ipf/ipf.conf),and it's working fine pass in quick from $server_ip to any port=22 block in quick from any to any port=22 But I tried almost same in... (1 Reply)
Discussion started by: Sumanthsv
1 Replies
fence_brocade(8)					      System Manager's Manual						  fence_brocade(8)

NAME
fence_brocade - I/O Fencing agent for Brocade FC switches SYNOPSIS
fence_brocade [OPTION]... DESCRIPTION
fence_brocade is an I/O Fencing agent which can be used with Brocade FC switches. It logs into a Brocade switch via telnet and disables a specified port. Disabling the port which a machine is connected to effectively fences that machine. Lengthy telnet connections to the switch should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions. fence_brocade accepts options on the command line as well as from stdin. fenced sends parameters through stdin when it execs the agent. fence_brocade can be run by itself with command line options which is useful for testing. After a fence operation has taken place the fenced machine can no longer connect to the Brocade FC switch. When the fenced machine is ready to be brought back into the GFS cluster (after reboot) the port on the Brocade FC switch needs to be enabled. This can be done by running fence_brocade and specifying the enable action. Vendor URL: http://www.brocade.com OPTIONS
-a IPaddress IP address of the switch. -h Print out a help message describing available options, then exit. -l login Login name for the switch. -n port The port number to disable on the switch. -o action The action required. disable (default) or enable. -p password Password for login. -S path Full path to an executable to generate the password for login. -q Quiet mode: print only error messages. -V Print out a version message, then exit. STDIN PARAMETERS
agent = < param > This option is used by fence_node(8) and is ignored by fence_brocade. ipaddr = < hostname | ip > IP address or hostname of the switch. login = < param > Login name. option = < param > The action required. disable (default) or enable. passwd = < param > Password for login. passwd_script = < param > Full path to an executable to generate the password for login. port = < param > The port number to disable on the switch. SEE ALSO
fence(8), fence_node(8) fence_brocade(8)
All times are GMT -4. The time now is 03:57 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy