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GWIA answers slow / disable reverse lookup

Hi,

here are more an on DNS-Service configured to the box where the GWIA is
running. If one of them is not reachable the gwia tooks 27 seconds to
send a 220 response.

But my clients are wait only for 5 seconds and after this they cut the
connection 😕

Is there a way to prohibid GWIA does a reverse lookup? (Hint: Even the
reverse lookup is not successful the GWIA will established the
connection. So why the reverse lookup is doing?

Bernd
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Knowledge Partner Knowledge Partner
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In article <3KiED.560$h_7.500@novprvlin0913.provo.novell.com>, Nntp-user
wrote:
> Hmm, there are three entrys in /etc/resolv.conf. But I see four querys
> in the debug log.
>
> Btw: One of them is the same host as this were the GWIA is running. -
> But ...


Is this host the 4th DNS server that is not in the /etc/resolv.conf or is
it just one of the three?

Which build of GWIA are you running? Still on shipping or on patched?
rpm -qa |grep group

is eDir happy?
ndsrepair -T
ndsrepair -E
ndsrepair -C -Ad -A


Andy of
http://KonecnyConsulting.ca in Toronto
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https://forums.novell.com/member.php/75037-konecnya
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Absent Member.
Absent Member.

Am 06.11.18 um 18:09 schrieb Andy Konecny:
> In article <3KiED.560$h_7.500@novprvlin0913.provo.novell.com>, Nntp-user
> wrote:
>> Hmm, there are three entrys in /etc/resolv.conf. But I see four querys
>> in the debug log.
>>
>> Btw: One of them is the same host as this were the GWIA is running. -
>> But ...

>
> Is this host the 4th DNS server that is not in the /etc/resolv.conf or is
> it just one of the three?

Yes, it is.

> Which build of GWIA are you running? Still on shipping or on patched?
> rpm -qa |grep group

groupwise-gwha-18.0.2-131493
groupwise-server-18.0.2-131493

> is eDir happy?
> ndsrepair -T
> ndsrepair -E
> ndsrepair -C -Ad -A

Output ends everytime with:
Total errors: 0

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In article <GCRED.570$h_7.174@novprvlin0913.provo.novell.com>, Nntp-user
wrote:
> > Is this host the 4th DNS server that is not in the /etc/resolv.conf or is
> > it just one of the three?

> Yes, it is.

Lets try that again as I wasn't clear enough the first time.
A) Is this host the 4th DNS server that is NOT in the /etc/resolv.conf
B) is this host one of the three that ARE in the /etc/resolv.conf?
a OR b?


Patched is good.
> > Is eDir happy?

> ..
> Total errors: 0

that is good.


Might be time for an SR


Andy of
http://KonecnyConsulting.ca in Toronto
Knowledge Partner
https://forums.novell.com/member.php/75037-konecnya
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Am 10.11.18 um 16:36 schrieb Andy Konecny:
> In article <GCRED.570$h_7.174@novprvlin0913.provo.novell.com>, Nntp-user
> wrote:
>>> Is this host the 4th DNS server that is not in the /etc/resolv.conf or is
>>> it just one of the three?

>> Yes, it is.

> Lets try that again as I wasn't clear enough the first time.
> A) Is this host the 4th DNS server that is NOT in the /etc/resolv.conf
> B) is this host one of the three that ARE in the /etc/resolv.conf?
> a OR b?


Sorry, I dit not read the question exactly ...

The answer ist A

There are four hosts, and each of them has a DNS. In the resolf.conf are
only the three foreign DNS-Servers.

Bernd
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In article <jT7QD.842$h_7.725@novprvlin0913.provo.novell.com>, Nntp-user
wrote:
> Sorry, I dit not read the question exactly ...

That happens, especially in a rush.

> The answer ist A
> There are four hosts, and each of them has a DNS. In the resolf.conf are
> only the three foreign DNS-Servers.


So we have two problems to go after.
A) why is GWIA using a DNS server that isn't in the resolv.conf
B) why are we seeing delays.

A) is now clearly in SR territory. Likely will prompt with an update, so
if you can proceed on that anyways, then useful to do so.
B) Are all four DNS servers normally operational? A nice test tool along
those lines is https://www.nirsoft.net/utils/dns_records_viewer.html
Perhaps doing packet captures on just port 53 on the box with GWIA to see
where the delay is. That way you can prove which is the delay, one of the
DNS servers(i.e. Something to fix) Or GWIA itself(i.e. Something for the
SR)



Andy of
http://KonecnyConsulting.ca in Toronto
Knowledge Partner
https://forums.novell.com/member.php/75037-konecnya
If you find a post helpful and are logged in the Web interface, please show
your appreciation by clicking on the star below. Thanks!

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Andy of Konecny Consulting in Toronto
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Absent Member.
Absent Member.

Am 24.01.19 um 03:45 schrieb Andy Konecny:
> In article <jT7QD.842$h_7.725@novprvlin0913.provo.novell.com>, Nntp-user
> wrote:

(...)
>> There are four hosts, and each of them has a DNS. In the resolf.conf are
>> only the three foreign DNS-Servers.

>
> So we have two problems to go after.
> A) why is GWIA using a DNS server that isn't in the resolv.conf
> B) why are we seeing delays.
>
> A) is now clearly in SR territory. Likely will prompt with an update, so
> if you can proceed on that anyways, then useful to do so.


> B) Are all four DNS servers normally operational?

Yes, you can do a request (via dig or nslookup) to an specified DNS and
you get the correct answer.

(...)
> Perhaps doing packet captures on just port 53 on the box with GWIA to see
> where the delay is. That way you can prove which is the delay, one of the
> DNS servers(i.e. Something to fix) Or GWIA itself(i.e. Something for the
> SR)

Why I missed this idea by myself ... ?

Indeed will check if there is a possibility to down one DNS-Service
(during business hours) and check the outgoing DNS requests. Maybe this
will need some time to get the permission. I will post the result of the
check.

Thx,

Bernd
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