ttl value when ping...

Hi there,

When I ping, for example www.cjman.com it returns a ttl value of 119. If I
ping www.gallaudet.edu, it returns a value of 50.

I have my Server 2003 set up and the DNS always returns a DNS value of 128.
I've gone and dickered with the TTL in the "A" records for the server, but
nothing can change it.

It is active directory integrated, but I am not sure if that has anything to
do with it.

How can I change the TTL value?

Thanks,.

Gordon

Deji
Fri Jun 18 23:13:07 CDT 2004

The TTL returned by a remote host is not controlled(or influenced) by your
DNS. The final TTL you see in your ping is REAL TTL set for that record
minus the number of hops the packets had to cross to get back to you.

Win2000/2003 (and maybe XP) ALWAYS return 128 when pinged on the LAN.

Now, why are you worrying about this?

--
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Dèjì Akómöláfé, MCSE MCSA MCP+I
Microsoft MVP - Directory Services
www.readymaids.com - COMPLETE SPAM Protection
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"Gordon J. Rattray" <gordscorp@shaw.ca> wrote in message
news:udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl...
> Hi there,
>
> When I ping, for example www.cjman.com it returns a ttl value of 119. If I
> ping www.gallaudet.edu, it returns a value of 50.
>
> I have my Server 2003 set up and the DNS always returns a DNS value of
128.
> I've gone and dickered with the TTL in the "A" records for the server, but
> nothing can change it.
>
> It is active directory integrated, but I am not sure if that has anything
to
> do with it.
>
> How can I change the TTL value?
>
> Thanks,.
>
> Gordon
>
>

Ace
Fri Jun 18 23:26:24 CDT 2004

In news:udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl,
Gordon J. Rattray <gordscorp@shaw.ca> posted their thoughts, then I offered
mine
> Hi there,
>
> When I ping, for example www.cjman.com it returns a ttl value of 119.
> If I ping www.gallaudet.edu, it returns a value of 50.
>
> I have my Server 2003 set up and the DNS always returns a DNS value
> of 128. I've gone and dickered with the TTL in the "A" records for
> the server, but nothing can change it.
>
> It is active directory integrated, but I am not sure if that has
> anything to do with it.
>
> How can I change the TTL value?
>
> Thanks,.
>
> Gordon

The TTLs on the returns are based on the machine it was coming from. Each
hop (router) it hits will decrement it by 1. If it reaches 0, the packet
expires. If there wasn't a TTL on the record, the packet would never expire
and exist forever and clutter up everything.

Here, read up on it:
Tracert and Ping Tutorial - understanding traceroute and ping results and
TTL values
http://www.visualware.com/whitepapers/tutorials/tracert.html

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

HAM AND EGGS: A day's work for a chicken; A lifetime commitment for a
pig. --
=================================

Kristofer
Sat Jun 19 02:31:02 CDT 2004

Hello,

You cannot control a remote TTL

--
Regards,
Kristofer Gafvert - IIS MVP
http://www.ilopia.com - When you need help!


"Gordon J. Rattray" <gordscorp@shaw.ca> wrote in message
news:udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl...
> Hi there,
>
> When I ping, for example www.cjman.com it returns a ttl value of 119. If I
> ping www.gallaudet.edu, it returns a value of 50.
>
> I have my Server 2003 set up and the DNS always returns a DNS value of
128.
> I've gone and dickered with the TTL in the "A" records for the server, but
> nothing can change it.
>
> It is active directory integrated, but I am not sure if that has anything
to
> do with it.
>
> How can I change the TTL value?
>
> Thanks,.
>
> Gordon
>
>

William
Sat Jun 19 12:57:13 CDT 2004

That TTL is not the same as DNS TTL. That is the ICMP packet ttl.

--
William Stacey, MVP

"Gordon J. Rattray" <gordscorp@shaw.ca> wrote in message
news:udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl...
> Hi there,
>
> When I ping, for example www.cjman.com it returns a ttl value of 119. If I
> ping www.gallaudet.edu, it returns a value of 50.
>
> I have my Server 2003 set up and the DNS always returns a DNS value of
128.
> I've gone and dickered with the TTL in the "A" records for the server, but
> nothing can change it.
>
> It is active directory integrated, but I am not sure if that has anything
to
> do with it.
>
> How can I change the TTL value?
>
> Thanks,.
>
> Gordon
>
>

Ace
Sat Jun 19 15:18:21 CDT 2004

In news:eAGGhdiVEHA.3016@tk2msftngp13.phx.gbl,
William Stacey [MVP] <staceywREMOVE@mvps.org> posted their thoughts, then I
offered mine
> That TTL is not the same as DNS TTL. That is the ICMP packet ttl.
>

Good point William. That TTL doesn't have anything to do with the A record.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

HAM AND EGGS: A day's work for a chicken; A lifetime commitment for a
pig. --
=================================

Roger
Sun Jun 20 00:49:29 CDT 2004

"William Stacey [MVP]" <staceywREMOVE@mvps.org> wrote in message
news:eAGGhdiVEHA.3016@tk2msftngp13.phx.gbl...
> That TTL is not the same as DNS TTL. That is the ICMP packet ttl.
>
> --
> William Stacey, MVP
>

Concisely the right reply.
The OP should examine their DNS service
behavior using such as dig or nslookup.
--
Roger
> "Gordon J. Rattray" <gordscorp@shaw.ca> wrote in message
> news:udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl...
> > Hi there,
> >
> > When I ping, for example www.cjman.com it returns a ttl value of 119. If
I
> > ping www.gallaudet.edu, it returns a value of 50.
> >
> > I have my Server 2003 set up and the DNS always returns a DNS value of
> 128.
> > I've gone and dickered with the TTL in the "A" records for the server,
but
> > nothing can change it.
> >
> > It is active directory integrated, but I am not sure if that has
anything
> to
> > do with it.
> >
> > How can I change the TTL value?
> >
> > Thanks,.
> >
> > Gordon
> >
> >
>

Thomas
Sun Jun 20 08:56:35 CDT 2004

In message <udOcdjaVEHA.1048@TK2MSFTNGP09.phx.gbl>, Gordon J. Rattray
<gordscorp@shaw.ca> writes
>Hi there,
>
>When I ping, for example www.cjman.com it returns a ttl value of 119. If I
>ping www.gallaudet.edu, it returns a value of 50.

I get 110, and 111 respectively.

>I have my Server 2003 set up and the DNS always returns a DNS value of 128.
>I've gone and dickered with the TTL in the "A" records for the server, but
>nothing can change it.

I think you are confusing TTL on the ICMP packet, and TTL on DNS record.
The former is how many hops a packet can take before being discardable,
the latter is how long a DNS record should be cached.

>It is active directory integrated, but I am not sure if that has anything to
>do with it.
>
>How can I change the TTL value?

The TTL values you note probably started off at 128, and were
decremented as they passed through the Internet. You could tracert for
it.

The first site I googled for
http://www.talkbroadband.com/tweaks/defaultttl2kxp.php has the answer as
to how to change Default IP TTL.


--
Thomas Lee
(tfl@psp.co.uk)