Re: DNS, Resolver, and /etc/hosts

[Phil Smith]

Thanks, Steve and Elardus-those look like the ticket! Will read and try to grok.

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Re: DNS, Resolver, and /etc/hosts

[Elardus Engelbrecht]

Steve Horein wrote:

>Something like this? 
>http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/f1a1b3b0/2.5.9

Good link, but that is for z/OS v1.13.


>I imagine the same (or similar) topic is documented for z/OS Comm Server 2.x, 
>...

Try this for z/OS v2.1, first URL is for UNIX environment and second URL is for 
'native MVS':

http://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.halz002/resolver_srch_orders_unix.htm

http://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.halz002/resolver_srch_orders_mvs.htm


Or just start here 'Resolver processing of the setup file when the resolver is 
started' :

http://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.halz002/resolver_setup_file_processing_at_startup.htm

HTH!

Groete / Greetings
Elardus Engelbrecht

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Re: DNS, Resolver, and /etc/hosts

[Steve Horein]

Something like this?
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/f1a1b3b0/2.5.9

I imagine the same (or similar) topic is documented for z/OS Comm Server
2.x, but I tend to avoid KnowledgeCenter searches in favor of *useful*
search interfaces.

On Fri, Jan 6, 2017 at 12:16 PM, Phil Smith  wrote:

> Anyone got a pointer to a coherent discussion of these three options for
> name resolution? I know how DNS and /etc/hosts work, and know enough about
> the Resolver to use and configure it for hosts that aren't in DNS.
>
> What I want to understand is (at least):
>
> 1) Is the Resolver always involved? That is, is it the equivalent of
> named on *ix?
>
> 2) How is the hierarchy determined? I *think* I've read that you can
> have z/OS use more than one of these; can you use all three? In which order?
>
> I've spent some time looking thru doc but haven't found this, though I'm
> sure it's there.
>
> Thanks.
>
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> For IBM-MAIN subscribe / signoff / archive access instructions,
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Re: DNS, Resolver, and /etc/hosts

[Itschak Mugzach]

Resolver is a kind of dns forwarder. This is just a front-end to your dns
that usually runs outside of the mainframe. The only dns redolution it make
is those defined in hosts file.

ITschak

בתאריך 7 בינו 2017 06:01,‏ "Phil Smith"  כתב:

Mike Schwab wrote:
>https://support.microsoft.com/en-us/kb/172218
>1, itself, 2 hosts file, 3 DNS, 4 NetBios.  Stops at first result.

I'm sorry, what does that have to do with z/OS? I realize it stops at the
first result-that's what resolution would be trying to do, no?

Signed,
Confused

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Re: DNS, Resolver, and /etc/hosts

[Phil Smith]

Mike Schwab wrote:
>https://support.microsoft.com/en-us/kb/172218
>1, itself, 2 hosts file, 3 DNS, 4 NetBios.  Stops at first result.

I'm sorry, what does that have to do with z/OS? I realize it stops at the first 
result-that's what resolution would be trying to do, no?

Signed,
Confused

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Re: DNS, Resolver, and /etc/hosts

[Mike Schwab]

https://support.microsoft.com/en-us/kb/172218

1, itself, 2 hosts file, 3 DNS, 4 NetBios.  Stops at first result.

On Fri, Jan 6, 2017 at 12:16 PM, Phil Smith  wrote:
> Anyone got a pointer to a coherent discussion of these three options for name 
> resolution? I know how DNS and /etc/hosts work, and know enough about the 
> Resolver to use and configure it for hosts that aren't in DNS.
>
> What I want to understand is (at least):
>
> 1) Is the Resolver always involved? That is, is it the equivalent of 
> named on *ix?
>
> 2) How is the hierarchy determined? I *think* I've read that you can have 
> z/OS use more than one of these; can you use all three? In which order?
>
> I've spent some time looking thru doc but haven't found this, though I'm sure 
> it's there.
>
> Thanks.
>
> --
> For IBM-MAIN subscribe / signoff / archive access instructions,
> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN



-- 
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?

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DNS, Resolver, and /etc/hosts

[Phil Smith]

Anyone got a pointer to a coherent discussion of these three options for name 
resolution? I know how DNS and /etc/hosts work, and know enough about the 
Resolver to use and configure it for hosts that aren't in DNS.

What I want to understand is (at least):

1) Is the Resolver always involved? That is, is it the equivalent of named 
on *ix?

2) How is the hierarchy determined? I *think* I've read that you can have 
z/OS use more than one of these; can you use all three? In which order?

I've spent some time looking thru doc but haven't found this, though I'm sure 
it's there.

Thanks.

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