[hobbit] Re: Conn test problems
Hobbit User in Richmond
hobbit at epperson.homelinux.net
Mon Jan 14 18:34:22 CET 2008
Actually, ICMP echo-request and echo-reply packets are almost certainly
not an issue here, nor is packet-filtering/firewalling. In current
implementations, traceroute by default uses UDP packets to abitrary and
unlikely-to-respond ports, varying the TTL and using the ICMP type 11
(Time Exceeded) from hops along the way to map the routing path.
The manpage in Fedora 8 says "We start our probes with a ttl of one and
increase by one until we...got to the "host", or hit a max (which defaults
to 30 hops)".
So, the behavior you're seeing is as documented. If a firewall were an
issue in sending/receiving the packets used by traceroute, you'd see the
30-hop behavior whether the host was up or down.
On Mon, January 14, 2008 11:17, Michael A. Price wrote:
> Josh,
>
>
>
> Thanks for helping... The source/destination is on a closed network,
> sorry...and I don't own the router...
>
>
>
> But, I don't understand, how the traceroute works when the host is up,
> but when the host is down it times out???
>
>
>
> If it works when the host is up, then you would think the ACL on the
> router just before the host would allow my ICMP packets through.
>
>
>
> What is your thoughts???
>
>
>
>
>
>
>
>
>
> From: Josh Luthman [mailto:josh at imaginenetworksllc.com]
> Sent: Thursday, January 10, 2008 11:01 AM
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] Re: Conn test problems
>
>
>
> That third hop is denying ICMP echoes to you. Is it a router of your
> own or is it outside your network? If you'd be willing to share that
> destination with us at least I would be willing to traceroute it from my
> location to help see if it is an issue at your end or not.
>
> On 1/10/08, Michael A. Price <mprice at sgt-inc.com> wrote:
>
> Yes....
>
>
>
> Its weird, from the shell#. I can trace route to the host if its up in
> 3 HOPS. But if the host is offline, it does 2 HOPS and then 28 more
> blank lines of stars. Not sure why it doesn't just time out after 3
> HOPS, it takes a couple minutes to time out.
>
>
>
> That's what my problem is, so I removed the trace option to my hosts.
> Any help would be great...
>
>
>
> Thanks, michael
>
>
>
>
>
>
>
>
>
>
>
> From: Josh Luthman [mailto:josh at imaginenetworksllc.com]
> Sent: Wednesday, January 09, 2008 3:32 PM
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] Re: Conn test problems
>
>
>
> Michael,
>
> Were you the one that couldn't traceroute to the host via the shell?
>
> Josh
>
> On 1/9/08, Michael A. Price < mprice at sgt-inc.com
> <mailto:mprice at sgt-inc.com> > wrote:
>
> My 'ping test completed' goes through the roof if my #trace tag is in
> the monitoring field and the host is down...
>
>
>
> It keeps trying to trace route and it times out..
>
>
>
> Never found a fix..
>
>
>
> ________________________________
>
> From: Josh Luthman [mailto: josh at imaginenetworksllc.com]
> Sent: Wednesday, January 09, 2008 10:55 AM
> To: hobbit at hswn.dk
> Subject: [hobbit] Re: Conn test problems
>
>
>
> Has anyone else encountered issues like this? Has anyone else
> encountered any similar issues with all the conn tests going haywire?
>
> I figured I'd also post this information while "bumping" the email:
>
> bbgen for Hobbit version 4.2.0
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Statistics:
>
>
>
>
>
>
> Hosts : 164
>
>
>
>
>
>
>
> Status messages : 531
>
>
>
>
>
>
>
> Purple messages : 0
>
>
>
>
>
>
> Pages : 1
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> TIME SPENT
>
>
>
>
>
>
> Event Starttime
> Duration
>
>
>
>
>
>
>
>
> Startup 1199894029.525853
> -
>
>
>
>
>
>
>
> Load links done 1199894029.526327
> 0.000474
>
>
>
>
>
>
>
> Load bbhosts done 1199894029.531645
> 0.005318
>
>
>
>
>
>
>
>
>
>
> ACK removal done 1199894029.531742
> 0.000097
>
>
>
>
>
>
>
> Load STATE done 1199894029.563429
> 0.031687
>
>
>
>
>
>
> Color calculation done
> 1199894029.563629 0.000200
>
>
>
>
>
>
>
> Hobbit pagegen start 1199894029.563659
> 0.000030
>
>
>
>
>
>
> Hobbit pagegen done
> 1199894029.573544 0.009885
>
>
>
>
>
>
> BB2 generation done
>
> 1199894029.576605 0.003061
>
>
>
>
>
>
> BBNK generation done 1199894029.577261
> 0.000656
>
>
>
>
>
>
> Summary transmission done 1199894029.577265
> 0.000004
>
>
>
>
>
>
>
>
>
>
> WML generation done
> 1199894029.578793
> 0.001528
>
>
>
>
>
>
> Run completed 1199894029.578798
> 0.000005
>
>
>
>
>
>
>
>
>
>
> TIME TOTAL
> 0.052945
>
>
>
> bbtest-net version
> 4.2.0
>
>
>
>
>
>
> SSL library : OpenSSL 0.9.8b 04 May 2006
>
>
>
>
>
>
> LDAP library: OpenLDAP 20327
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Statistics:
>
>
>
>
>
>
>
> Hosts total : 161
>
>
>
>
>
>
>
> Hosts with no tests : 1
>
>
>
>
>
>
> Total test count : 181
>
>
>
>
>
>
>
> Status messages : 182
>
>
>
>
>
>
>
>
> Alert status msgs : 0
>
>
>
>
>
>
> Transmissions : 3
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> DNS statistics:
>
>
>
>
>
>
>
>
>
>
> # hostnames resolved : 16
>
>
>
>
>
>
>
> # succesful : 16
>
>
>
>
>
>
> # failed : 0
>
>
>
>
>
>
>
> # calls to dnsresolve : 27
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> TCP test statistics:
>
>
>
>
>
>
>
> # TCP tests total : 13
>
>
>
>
>
>
> # HTTP tests : 5
>
>
>
>
>
>
>
>
>
>
> # Simple TCP tests : 8
>
>
>
>
>
>
>
> # Connection attempts : 13
>
>
>
>
>
>
> # bytes written : 780
>
>
>
>
>
>
>
> # bytes read : 22792
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> TIME SPENT
>
>
>
>
>
>
> Event Starttime
> Duration
>
>
>
>
>
>
>
>
>
>
> bbtest-net startup 1199893834.785076
> -
>
>
>
>
>
>
>
> Service definitions loaded
> 1199893834.787463 0.002387
>
>
>
>
>
>
>
>
>
>
> Tests loaded 1199893834.793085
> 0.005622
>
>
>
>
>
>
>
> DNS lookups completed 1199893834.883042
> 0.089957
>
>
>
>
>
>
> Test engine setup completed
> 1199893834.886789 0.003747
>
>
>
>
>
>
>
> TCP tests completed 1199893835.028904
> 0.142115
>
>
>
>
>
>
> PING test completed (160 hosts)
> 1199893870.087696 35.058792
>
>
>
>
>
>
> PING test results sent
>
> 1199893870.090125 0.002429
>
>
>
>
>
>
> Test result collection completed 1199893870.090173
> 0.000048
>
>
>
>
>
>
> LDAP test engine setup completed 1199893870.090175
> 0.000002
>
>
>
>
>
>
>
>
>
>
> LDAP tests executed
> 1199893870.090177
> 0.000002
>
>
>
>
>
>
> LDAP tests result collection completed 1199893870.090179
> 0.000002
>
>
>
>
>
>
>
>
>
>
> NSLOOKUP tests executed 1199893870.244778
> 0.154599
>
>
>
>
>
>
>
> Test results transmitted
> 1199893870.246478 0.001700
>
>
>
>
>
>
>
>
>
>
> bbtest-net completed 1199893870.248556
> 0.002078
>
>
>
>
>
>
>
> TIME TOTAL
> 35.463480
>
>
>
> On 1/7/08, Josh Luthman <josh at imaginenetworksllc.com> wrote:
>
> I've been getting a lot of these recently. A lot of the time I'll get a
> good 3/4 of the hosts I'm monitoring like this, other days it is just
> one or two. I can't seem to find any pattern to it. I'm very confident
> it isn't network related as it happens to the first entry, Hobbit
> server. I just can't imagine why it would have issues getting to
> 127.0.0.1!
>
> I was also under the impression that the ping test is done every 60s or
> 120s so these tests just can't be true positive results.
>
> Poking around I also found that the test to my hobbit server (this is
> 127.0.0.1 mind you) went up in early December.
>
> Looking for any input at this point!
>
> --
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
> Those who don't understand UNIX are condemned to reinvent it, poorly.
> --- Henry Spencer
>
>
>
>
>
> --
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
> Those who don't understand UNIX are condemned to reinvent it, poorly.
> --- Henry Spencer
>
>
>
>
> --
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
> Those who don't understand UNIX are condemned to reinvent it, poorly.
> --- Henry Spencer
>
>
>
>
> --
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
> Those who don't understand UNIX are condemned to reinvent it, poorly.
> --- Henry Spencer
>
>
More information about the Xymon
mailing list