Well that's interesting. Here's what I see (but I'm not having a problem); note
several "DNS address" entries:
netstat -qSUM DNS
MVS TCP/IP NETSTAT CS 3.1 TCPIP Name: TCPIP 15:48:25
Storage Usage:
Maximum: 200M
Current: 25K MaxUsed: 35K
Cache Usage:
Total number of entries: 0
Non-NX entries: 0
A: 0 AAAA: 0 PTR: 0
NX entries: 0
A: 0 AAAA: 0 PTR: 0
Queries: 497 Hits: 346
SuccessRatio: 70%
DNS address: 9.0.0.1
Total number of entries: 0
Non-NX entries: 0
A: 0 AAAA: 0 PTR: 0
NX entries: 0
A: 0 AAAA: 0 PTR: 0
References: 151 Hits: 0
DNS address: 208.67.222.222
Total number of entries: 0
Non-NX entries: 0
A: 0 AAAA: 0 PTR: 0
NX entries: 0
A: 0 AAAA: 0 PTR: 0
References: 151 Hits: 0
DNS address: 8.8.8.8
Total number of entries: 0
Non-NX entries: 0
A: 0 AAAA: 0 PTR: 0
NX entries: 0
A: 0 AAAA: 0 PTR: 0
References: 497 Hits: 346
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Mark Pace
Sent: Wednesday, June 4, 2025 4:40 PM
To: [email protected]
Subject: Re: Resolver Issue
Not seeing anything useful there.
> netstat -qSUM DNS
MVS TCP/IP NETSTAT CS V2R5 TCPIP Name: TCPIP 20:38:18
Storage Usage:
Maximum: 200M
Current: 8K MaxUsed: 9K
Cache Usage:
Total number of entries: 0
Non-NX entries: 0
A: 0 AAAA: 0 PTR: 0
NX entries: 0
A: 0 AAAA: 0 PTR: 0
Queries: 0 Hits: 0
SuccessRatio: 0%
>
On Wed, Jun 4, 2025 at 3:42 PM Phil Smith III <
[email protected]> wrote:
> Looks like:
> netstat -qSUM DNS
> might also have been useful? Too late now, but maybe helpful for the
> next victim? I'm not 100% sure--went trolling to see what might be
> used since no IPCONFIG/IFCONFIG and found that.
>
> -----Original Message-----
> From: IBM Mainframe Discussion List <[email protected]> On
> Behalf Of Mark Pace
> Sent: Wednesday, June 4, 2025 3:32 PM
> To: [email protected]
> Subject: Re: Resolver Issue
>
> About 2 mins later.
>
> EZZ9310I NAME SERVER 10.6.0.10 001
> TOTAL NUMBER OF QUERIES SENT 21
> TOTAL NUMBER OF FAILURES 21
> PERCENTAGE 100%
>
> On Wed, Jun 4, 2025 at 3:21 PM Mark Pace <[email protected]> wrote:
>
> > I'll give it a try and keep an eye out.
> >
> > F RESOLVER,FLUSH,ALL
> > EZZ9305I 0 CACHE ENTRIES DELETED
> > EZZ9293I FLUSH COMMAND PROCESSED
> >
> > On Wed, Jun 4, 2025 at 3:09 PM Steely.Mark <
> > [email protected]> wrote:
> >
> >> Try this: F RESOLVER,FLUSH,ALL
> >>
> >> Thanks
> >>
> >> -----Original Message-----
> >> From: IBM Mainframe Discussion List <[email protected]> On
> >> Behalf Of Mark Pace
> >> Sent: Wednesday, June 04, 2025 2:06 PM
> >> To: [email protected]
> >> Subject: Re: Resolver Issue
> >>
> >> !
> >>
> >> CAUTION! EXTERNAL SENDER! STOP, ASSESS, AND VERIFY Do you know this
> >> person? Were you expecting this email? If not, report it using the
> >> Report Phishing Button!
> >>
> >> IPCONFIG isn't a command on z/OS, it's a configuration statement.
> >>
> >> The only thing I can be sure of is that it is the RESOLVER sending
> >> the error messages.
> >>
> >> *STC05615* 00000090 $HASP100 RESOLVER ON STCINRDR
> >> *STC05615* 00000090 EZZ9310I NAME SERVER 10.6.0.10 982
> >> 982 00000090 TOTAL NUMBER OF QUERIES SENT 21
> >> 982 00000090 TOTAL NUMBER OF FAILURES 21
> >> 982 00000090 PERCENTAGE 100%
> >>
> >>
> >> *SYS1.PROCLIB(RESOLVER)*
> >> //RESOLVER PROC PARMS='CTRACE(CTIRES00)'
> >> //EZBREINI EXEC PGM=EZBREINI,REGION=0M,TIME=1440,PARM=&PARMS
> >> //SETUP DD DSN=SYS3.TCPIP.TCPPARMS(RESSETUP),DISP=SHR,FREE=CLOSE
> >>
> >> *SYS3.TCPIP.TCPPARMS(RESSETUP)*
> >> DEFAULTTCPIPDATA('SYS3.TCPIP.TCPPARMS(TCPDATA)')
> >> NOCOMMONSEARCH
> >> CACHE
> >> CACHESIZE(200M)
> >> MAXTTL(2147483647)
> >> UNRESPONSIVETHRESHOLD(25)
> >>
> >> *SYS3.TCPIP.TCPPARMS(TCPDATA)*
> >> LOOKUP LOCAL DNS
> >> NAMESERVER 8.8.8.8 8.8.4.4
> >> NSPORTADDR 53
> >> RESOLVEVIA UDP
> >> RESOLVERTIMEOUT 30
> >> RESOLVERUDPRETRIES 1
> >>
> >> On Wed, Jun 4, 2025 at 2:24 PM Phil Smith III <[email protected]> wrote:
> >>
> >> > I don't know but I'd try ipconfig and see what it says? Easter
> >> > Egging for sure...
> >> >
> >> > -----Original Message-----
> >> > From: IBM Mainframe Discussion List <[email protected]> On
> >> > Behalf Of Mark Pace
> >> > Sent: Wednesday, June 4, 2025 1:55 PM
> >> > To: [email protected]
> >> > Subject: Resolver Issue
> >> >
> >> > I used to have a linux under VM system that was a DNS server.
> >> > My z/OS systems used this DNS server. Recently I decided to
> >> > retire that DNS server.
> >> >
> >> > I updated the TCPIP.DATA file, removed the 10.6.0.10 address and
> >> > added
> >> > 8.8.8.8 and 8.8.4.4.
> >> > SYS3.TCPIP.TCPPARMS(TCPDATA)
> >> > NAMESERVER 8.8.8.8 8.8.4.4
> >> >
> >> > Stopped the resolver and restarted it.
> >> > And it works
> >> >
> >> > EZB3170I Server: dns.google
> >> > EZB3172I Address: 8.8.8.8
> >> >
> >> > EZB3110I Non-authoritative answer:
> >> > EZB3170I Name: eccgw.southdata.ibm.com
> >> > EZB3172I Address: 170.225.122.67 EZB3175I Aliases:
> >> > eccgw01.boulder.ibm.com
> >> >
> >> > However - I am still receiving this error message.
> >> >
> >> > EZZ9308E UNRESPONSIVE NAME SERVER DETECTED AT IP ADDRESS
> >> > 10.6.0.10 EZZ9310I NAME SERVER 10.6.0.10 940
> >> > TOTAL NUMBER OF QUERIES SENT 18 TOTAL
> >> NUMBER
> >> > OF FAILURES 18 PERCENTAGE
> >> > 100%
> >> >
> >> > Why would I still receive this error?
> >> >
> >> > --
> >> > The postings on this site are my own and don’t necessarily
> >> > represent Mainline’s positions or opinions
> >> >
> >> > Mark D Pace
> >> > Senior Systems Engineer
> >> > Mainline Information Systems
> >> >
> >> > -----------------------------------------------------------------
> >> > --
> >> > --- For IBM-MAIN subscribe / signoff / archive access
> >> > instructions, send email to [email protected] with the
> >> > message: INFO IBM-MAIN
> >> >
> >> > -----------------------------------------------------------------
> >> > --
> >> > --- For IBM-MAIN subscribe / signoff / archive access
> >> > instructions, send email to [email protected] with the
> >> > message: INFO IBM-MAIN
> >> >
> >>
> >>
> >> --
> >> The postings on this site are my own and don’t necessarily
> >> represent Mainline’s positions or opinions
> >>
> >> Mark D Pace
> >> Senior Systems Engineer
> >> Mainline Information Systems
> >>
> >> -------------------------------------------------------------------
> >> --
> >> - For IBM-MAIN subscribe / signoff / archive access instructions,
> >> send email to [email protected] with the message: INFO
> >> IBM-MAIN
> >>
> >> -------------------------------------------------------------------
> >> --
> >> - For IBM-MAIN subscribe / signoff / archive access instructions,
> >> send email to [email protected] with the message: INFO
> >> IBM-MAIN
> >>
> >
> >
> > --
> > The postings on this site are my own and don’t necessarily represent
> > Mainline’s positions or opinions
> >
> > Mark D Pace
> > Senior Systems Engineer
> > Mainline Information Systems
> >
> >
> >
> >
>
> --
> The postings on this site are my own and don’t necessarily represent
> Mainline’s positions or opinions
>
> Mark D Pace
> Senior Systems Engineer
> Mainline Information Systems
>
> ----------------------------------------------------------------------
> For IBM-MAIN subscribe / signoff / archive access instructions, send
> email to [email protected] with the message: INFO IBM-MAIN
>
> ----------------------------------------------------------------------
> For IBM-MAIN subscribe / signoff / archive access instructions, send
> email to [email protected] with the message: INFO IBM-MAIN
>
--
The postings on this site are my own and don’t necessarily represent Mainline’s
positions or opinions
Mark D Pace
Senior Systems Engineer
Mainline Information Systems
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions, send email to
[email protected] with the message: INFO IBM-MAIN
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send email to [email protected] with the message: INFO IBM-MAIN
