I am writing a shell script to use telnet for the connection test
There are 3 cases to test and detail as:
Code:
/* 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 */
# telnet host_a 20102 < /dev/null 2>&1 | grep -q Connected
# echo $? return 1
/* Case 3 - The port is blocked by Firewall */
# telnet host_b 21701 < /dev/null 2>&1
Trying 160.1.1.1...
# Need to use Ctrl+C to exit
For case 1 and case 2, I am able to handle in a script. However, I don't know how to handle case 3 in script, it is hold when "Trying 160.1.1..." and need to use Ctrl+C to exit.
I'm trying to configure a firewall for AIX to accept incoming connections on ports 22 and 443 and deny everything else. All is ok; the server accepts connections only on 22 and 443, but after that I also need to accept all outgoing connections -- ssh and telnet, for example. So I started with
... (0 Replies)
I am using blow script :--
#!/bin/bash
FIND=$(ps -elf | grep "snmp_trap.sh" | grep -v grep) #check snmp_trap.sh is running or not
if
then
# echo "process found"
exit 0;
else
echo "process not found"
exec /home/Ketan_r /snmp_trap.sh 2>&1 & disown -h ... (1 Reply)
Alright... this question comes from the fact that I'm trying to setup postfix to relay messages to Office 365 SMTP but its giving me connection refused... I read that if you have doubts if your port is open or not you should telnet to them so thats what I did.
This is a Red Hat 6.3 box.
My... (4 Replies)
Hi everyone,
I am hoping anyone of you could help me in this weird problem we have in 1 of our Solaris 10 servers. Lately, we have been having some ftp problems in this server. Though it can ping any server within the network, it seems that it can only ftp to a select few. For most servers, the... (4 Replies)
startup script displays a message:
# /etc/init.d/firewall start
Starting firewall: iptables
iptables v1.4.2: Can't use -i with OUTPUT
Try `iptables -h' or 'iptables --help' for more information.
iptables v1.4.2: Can't use -i with OUTPUT
not to understand what is wrong in the... (2 Replies)
Hello,
I made a following script that check every 5 minutes to check firewall is running or not, if firewall down that raise an alert only once, but following script generate an alert every 5 minutes according to cronjob:
FILE="/var/log/fwstatus"
CHK="/tmp/fwstatus"
service... (1 Reply)
Hi I have a bit of c code which I'm trying to use as a relay between apache and a scgi cluster.
Example of problem code is below:
while((n = recv(scgiSock, local_data, MAX_LENGTH, 0)) > 0)
{
time(&t2);
time_now = t2 - t1;
if(time_now > TIMEOUT)
... (2 Replies)
Hello,
Is it possible to check if a host is accepting connections on a particular port using a shell script? Can't we automate telnet to check for the same?
Thanks in advance
Azmath H Shaik (3 Replies)
UTIN Firewall script for Linux 2.4.x and iptables
==============================================
#!/bin/sh
#
# rc.firewall - UTIN Firewall script for Linux 2.4.x and iptables
#
# Copyright (C) 2001 Oskar Andreasson <bluefluxATkoffeinDOTnet>
#
# This program is free software; you can... (5 Replies)
