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0001173: DNS lookups are not showing SRV records for underscore entries - MantisBT Endian Bugtracker
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IDProjectCategoryView StatusDate SubmittedLast Update
0001173Endian FirewallApplication Level Proxiespublic2008-07-28 18:462009-10-27 12:02
Assigned Topeter-endian 
PlatformOSOS Version
Product Version2.2-rc1 
Target Version2.3Fixed in Version2.3 
Summary0001173: DNS lookups are not showing SRV records for underscore entries
DescriptionIf you do a nslookup from a client for say '" it returns nothing found, but if you use a specific DNS server such as it resolves it correctly. This causes havoc for MS Communicator and possibly other AD items that lookup underscore DNS entries.

DNSMasq was 2.38 and latest is 2.43 I believe.
Additional Informationnslookup -type=all

*** No all records (ANY) records available for


nslookup -type=all

Non-authoritative answer: SRV service location:
          priority = 0
          weight = 0
          port = 443
          svr hostname =
TagsNo tags attached.
Attached Files

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-  Notes
kfason (reporter)
2008-08-09 06:08

Found the problem. in you have option filterwin2k enabled. It needs to be commented out for SRV records to resolve correctly. This affects not just Microsoft Communicator in my original ticket portion but also many SIP products use SRV records.

# Uncomment this to filter useless windows-originated DNS requests
# which can trigger dial-on-demand links needlessly.
# Note that (amongst other things) this blocks all SRV requests,
# so don't use it if you use eg Kerberos.
# This option only affects forwarding, SRV records originating for
# dnsmasq (via srv-host= lines) are not suppressed by it.
kfason (reporter)
2008-08-09 06:23

forgot path.

/etc/dnsmasq.conf.tmpl I believe.
peter-endian (administrator)
2008-10-21 14:57

i changed this to be default in 2.3

- Issue History
Date Modified Username Field Change
2008-07-28 18:46 kfason New Issue
2008-08-09 06:08 kfason Note Added: 0001513
2008-08-09 06:23 kfason Note Added: 0001514
2008-08-11 08:57 peter-endian Status new => acknowledged
2008-08-11 08:57 peter-endian Target Version => 2.2
2008-09-10 15:41 chris-endian Target Version 2.2 => 2.3
2008-10-10 14:03 peter-endian Status acknowledged => new
2008-10-10 14:03 peter-endian Assigned To => peter-endian
2008-10-21 14:57 peter-endian Note Added: 0001733
2008-10-21 14:57 peter-endian Status new => resolved
2008-10-21 14:57 peter-endian Fixed in Version => 2.3
2008-10-21 14:57 peter-endian Resolution open => fixed
2009-10-27 12:02 peter-endian Status resolved => closed

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