I have firewall rules to open ports, why telnet refuses connection? Post: 302754525

10 More Discussions You Might Find Interesting

1. Cybersecurity

firewall vs. closing ports

This may be kind of a stupid question, but here goes: Say I'm running a FreeBSD webserver (w/apache). I've managed to close ALL open ports (including SSH/telnet and portmapper), excepting '80' that apache is listening on. A netstat -a shows me nothing open. Discounting DoS/DDoS or holes in...

2. UNIX for Dummies Questions & Answers

How to telnet if you r behind firewall????

Hi all My freind has Windows 98 and behind a firewall ports used are (LAN) http:80 ftp :80 Socks :1080 I have telnet server and connected to TCP/IP i.e modem and phone line I want to let my freind Enter my linux box (telnet tunnel) i.e using port 80 and redirect it to telnet port:23...

3. UNIX for Advanced & Expert Users

Firewall - 2 Internet accesses - routing rules from source

Hello, I would like to modify my firewall configuration for being able to handle 2 internet connections in my Red zone. I would then like to configure some selecting routing rules depending on the internal source. Actual configuration: ===================== 1 router A (ISP)...

4. UNIX for Advanced & Expert Users

Firewall to other machines open

Hi, I am relatively new to UNIX. From the UNIX machine is there anyway of finding out to what and all other machines is the firewall open. We usually do telnet <machine_name> <port> to fidn out if the firewall is open. Is there anyway i can get an entire list. Thanks

5. Cybersecurity

Firewall Ports

Could someone please settle an inter-office argument? Will your network traffic be slower through a firewall on any other port other than port 80. In other words, is port 80 faster than any other port you open on the firewall. I say no. Thanks in advance for the help!

6. Shell Programming and Scripting

Telnet script to test open ports on mult servers

Hello All, Can somebody help me with this script. I have an output file with a list of servers ips and ports. I need to be able to run this script to list all the server ips in the outfile and find out if the port is open or not. #!/bin/sh IFS=#;for i in $(cat portTest); do # check...

7. Shell Programming and Scripting

Script for checking firewall connection

Dear all I am writing a shell script to use telnet for the connection test There are 3 cases to test and detail as: /* Case 1 - The port can be connected */ # telnet host_a 20101 < /dev/null 2>&1 | grep -q Connected # echo $? return 0 /* Case 2 - The port cannot be connected */ #...

8. Red Hat

Iptables/Firewall rules for multicast IP.

Hi Gurus, I need to add Multicast Port = xyz Multicast Address = 123.134.143 ( example) to my firewall rules. Can you please guide me with the lines I need to update my iptables files with.

9. AIX

AIX firewall accept established connection

I'm trying to configure a firewall for AIX to accept incoming connections on ports 22 and 443 and deny everything else. All is ok; the server accepts connections only on 22 and 443, but after that I also need to accept all outgoing connections -- ssh and telnet, for example. So I started with ...

10. Shell Programming and Scripting

Telnet of multiple server and ports

Hi, I do a telnet to a single server using command :telnet tibserver001 9640 The output i get is : Trying 10.19.... Connected to tibserver001 However i need to put all the servers in a single file and get the output to see if the server is connected or not. #! /bin/bash telnet...

LEARN ABOUT DEBIAN

tcpconnect

TCPCONNECT(1)						      General Commands Manual						     TCPCONNECT(1)

NAME

       tcpconnect - general TCP/IP client

SYNOPSIS

       tcpconnect [-irv] [-l localaddr] host port

DESCRIPTION

       tcpconnect  creates  a TCP/IP connection to a server running on the machine host, listening to port port.  It then reads standard input and
       sends to the remote server, and data received from the server is printed to standard output.  When end-of-file is reached on both  standard
       input and the TCP/IP connection, tcpconnect terminates.

OPTIONS

       -i     Terminate at end-of-file on standard input; don't wait for the server to close the connection.

       -r     Terminate when the remote server closes the connection; don't wait for end-of-file on standard input.

       -v     Verbose mode.  Prints a message to standard error when the connection has been established.

       -l addr:port
	      Bind  the local end-point of the connection to IP address addr, TCP port port.  Either the IP address or the port, but not both, may
	      be left out, meaning that the operating system gets to choose that part by itself.

SEE ALSO

       tcplisten(1), telnet(1), tcpbug(1).

BUGS

       The names of the options are not yet finalized, and may change at a future release.

								   1997 April 13						     TCPCONNECT(1)

10 More Discussions You Might Find Interesting

1. Cybersecurity

firewall vs. closing ports

Discussion started by: adam_crosby

2. UNIX for Dummies Questions & Answers

How to telnet if you r behind firewall????

Discussion started by: atiato

3. UNIX for Advanced & Expert Users

Firewall - 2 Internet accesses - routing rules from source

Discussion started by: el70

4. UNIX for Advanced & Expert Users

Firewall to other machines open

Discussion started by: dnatarajan