batch script required to check for firewall issues

#!/bin/bash


ssh user@server1 netcat -z 149.129.111.83 && echo S1 .83 telnet port OK || echo S1 .83 telnet port ERROR > out.log
ssh user@server1 netcat -z 149.129.111.84 && echo S1 .84 telnet port OK || echo S1 .84 telnet port ERROR >> out.log
ssh user@server1 netcat -z 149.129.111.85 && echo S1 .85 telnet port OK || echo S1 .85 telnet port ERROR >> out.log
ssh user@server1 netcat -z 149.129.111.86 && echo S1 .86 telnet port OK || echo S1 .86 telnet port ERROR >> out.log

ssh user@server2 netcat -z 149.129.111.83 &&  echo S2 .83 telnet port OK || echo S2 .83 telnet port ERROR >> out.log
...

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Assumptions:

1. ssh needts to be running on server 1 and 2 and accept password less logins via kerberos or keys.
2. the tool netcat needs to be installes on both servers

thanks Andreas, will this work on windows servers?

is netcat included in the OS aready?

nope will not run on windows. when I hear server i assume a unixoid OS, you might get it to run with installation of cygwin on all machines, but be aware that you also need to install an ssh service which also can be a security problem if it is not cared properly with. And the cygwin things wont be automatically patched over windows update.

How to realize this on windows Ive no idea.

BTW i hope the mentioned IPs are not accessible via TELNET over the internet. Its a very bad idea.

I overlooked the category the post was filed in, as its only shown very small in the EE pages...

qlermo

thanks for this, i realize I missed the ports, how do I add this to this script?

cheers

just add port number 23 after the IP in the netcat woild look like that:

... do netcat -z 149.129.111.%%i 23 >nul ....

rest of script remains the same. same applies to the bash script i also forgot the port numbers there.

andreas

I am getting an error:



PsExec v2.11 - Execute processes remotely
Copyright (C) 2001-2014 Mark Russinovich
Sysinternals - www.sysinternals.com

\\myhostname

'netcat' is not recognized as an internal or external command,
operable program or batch file.
'netcat' is not recognized as an internal or external command,
operable program or batch file.
cmd exited on myhostname with error code 0.
Press any key to continue . . .

how exactly do I correctly call up Netcat to run the telnet?

The script expects netcat to be on the same location as the batch file.

Netcat is not a standard windows program. You need to install it first on the machines that need to use it.

You can find it here  http://www.securityfocus.com/tools/139

I've requested that this question be closed as follows:

Accepted answer: 0 points for rutgermons's comment #a40460386

for the following reason:

good

you should distribute the points when closing the topic to the participants according to the usefulness regarding solving your problem.

I'm objecting,  as you selected your own comment as answer. Please make sure to use the action buttons above the comment to accept.

good