Opened 12 years ago

Closed 12 years ago

#55 closed defect (fixed)

DNS misconfiguration lead to ftp.sara.nl domain name not existing

Reported by: olivier.korn@… Owned by:
Priority: critical Milestone:
Version: Keywords: ftp.sara.nl dns ipv6 ipv4
Cc: olivier.korn@…

Description

Hi,

If you are using a IPv6 enabled DNS server, it will ask your DNS servers for IPv6 address of ftp.sara.nl (which doesn't exist). But ns2.surfnet.nl will answer that this name (ftp.sara.nl) doesn't exist at all [error 3(NXDOMAIN)], preventing the resolver to try an IPv4 request.

Could you ask your provider to correct this error?

By the way, your other 2 DNS servers (nsauth1.sara.nl and nsauth2.sara.nl) are OK.

Change History (4)

comment:1 Changed 12 years ago by olivier.korn@…

Example of a defect DNS request:

# host ftp.sara.nl ns2.surfnet.nl
Using domain server:
Name: ns2.surfnet.nl
Address: 2001:610:3:200a:192:87:36:2#53
Aliases:

Host ftp.sara.nl not found: 3(NXDOMAIN)

comment:2 Changed 12 years ago by Olivier Korn <olivier.korn@…>

  • Cc olivier.korn@… added
  • Keywords ftp.sara.nl dns ipv6 ipv4 added
  • Priority changed from major to critical
  • Summary changed from DNS misconfiguration lead to ftp.sara.nl domain not existing to DNS misconfiguration lead to ftp.sara.nl domain name not existing
  • Version 5.5.0 deleted

comment:3 Changed 12 years ago by Olivier Korn <olivier.korn@…>

Using one of the two other DNS servers of yours is OK:

# host ftp.sara.nl nsauth1.sara.nl
Using domain server:
Name: nsauth1.sara.nl
Address: 145.100.3.26#53
Aliases:

ftp.sara.nl is an alias for ftp.hpcv.sara.nl.
ftp.hpcv.sara.nl is an alias for ftp.rc.sara.nl.
ftp.rc.sara.nl has address 145.100.29.218

comment:4 Changed 12 years ago by bas

  • Resolution set to fixed
  • Status changed from new to closed

We installed a new machine with a new ip. So it takes a while if all name servers have thje new address. We have nothing to do with ns2.surfnet.nl. But is works for now:

bas@saralt0081:~$ host ftp.sara.nl ns2.surfnet.nl
Using domain server:
Name: ns2.surfnet.nl
Address: 192.87.36.2#53
Aliases: 

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