I hacked together (mainly ripped out some stuff and reversed a
comparison) a tcp.down.monitor using the tcp.monitor script. I was
going to just build it in to the tcp.monitor script with a "-n" cmd line
to negate the compare, but gave up after it started to look like it
would probably take more than 2 minutes to figure it out...
Below is the diff between tcp.monitor and tcp.down.monitor.
Of course, being as how I'm not a perl coder BY ANY STRETCH OF THE
DEFINITION (Seriously. Clueless.), I may have inadvertantly mucked
something up...so USE AT YOUR OWN RISK...but it seems to work for me:
-------clip-------
[EMAIL PROTECTED] OLD]# ./tcp.down.monitor -p 666 -t 1 www.google.com
[EMAIL PROTECTED] OLD]# echo $?
0
[EMAIL PROTECTED] OLD]# ./tcp.down.monitor -p 80 -t 1 www.google.com
www.google.com
www.google.com connected on port 80
[EMAIL PROTECTED] OLD]# echo $?
1
-------clip-------
Yeah, I'm logged in as root...What of it? :)
-------diff-------
81c81
< if ($@) {
---
> if (defined $r) {
83,97c83
<
< if ($@ eq "alarm\n") {
< push @detail, "$host timeout";
<
< } else {
< push @detail, "$host interrupted syscall: $!";
< }
<
< close (S);
< next;
< }
<
< if (!defined $r) {
< push @failures, $host;
< push @detail, "$host could not connect: $!";
---
> push @detail, "$host connected on port $PORT";
------/diff-------
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Frank Isemann
Sent: Monday, November 14, 2005 12:12 PM
To: mon@linux.kernel.org
Subject: Re: firewall check
hi,
sure, rewrite the tcp.monitor, or ask the developer if he can add your
feature :)
greetz eXplasm
Daniel K. Gebhart schrieb:
>Hi!
>
> Is it possible to negate rules in mon? I wanna check if our firewalls
are
> running. Therefor I check if a port on a remote host is filtered or
> closed. When I use tcp.monitor, I get notified when the port is
closed.
> But I want to get notified when it's opened. Any idea?
>
>lg/br,
> daniel k. gebhart
>
>
>
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