The windows workaround in phpbb_checkdnsrr() performs a nslookup via exec. It then assumes that valid responses begin with the hostname we're looking up. This however doesn't seem to be true when looking up A records.
C:\Users\afischer>nslookup -type=A phpbb.com.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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Nicht-autorisierende Antwort:
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Name: phpbb.com
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Address: 140.211.15.9
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C:\Users\afischer>nslookup -type=ANY phpbb.com.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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Nicht-autorisierende Antwort:
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phpbb.com internet address = 140.211.15.9
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phpbb.com nameserver = ns3.auth.osuosl.org
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phpbb.com nameserver = ns1.auth.osuosl.org
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phpbb.com nameserver = ns2.auth.osuosl.org
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phpbb.com nameserver = ns2.auth.osuosl.org
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phpbb.com nameserver = ns1.auth.osuosl.org
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phpbb.com nameserver = ns3.auth.osuosl.org
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ns1.auth.osuosl.org internet address = 140.211.166.140
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ns2.auth.osuosl.org internet address = 140.211.166.141
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ns3.auth.osuosl.org internet address = 216.165.191.53
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C:\Users\afischer>nslookup -type=MX phpbb.com.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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Nicht-autorisierende Antwort:
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phpbb.com MX preference = 5, mail exchanger = smtp2.osuosl.org
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phpbb.com MX preference = 5, mail exchanger = smtp3.osuosl.org
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phpbb.com MX preference = 5, mail exchanger = smtp4.osuosl.org
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phpbb.com MX preference = 5, mail exchanger = smtp1.osuosl.org
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phpbb.com nameserver = ns1.auth.osuosl.org
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phpbb.com nameserver = ns2.auth.osuosl.org
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phpbb.com nameserver = ns3.auth.osuosl.org
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ns1.auth.osuosl.org internet address = 140.211.166.140
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ns2.auth.osuosl.org internet address = 140.211.166.141
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ns3.auth.osuosl.org internet address = 216.165.191.53
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C:\Users\afischer>nslookup -type=AAAA www.fsmi.uni-karlsruhe.de.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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Nicht-autorisierende Antwort:
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Name: fsmi-www.fsmi.uni-karlsruhe.de
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Address: 2a00:1398:4000::acff:fe16:3ba2
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Aliases: www.fsmi.uni-karlsruhe.de
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C:\Users\afischer>nslookup -type=NS phpbb.com.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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Nicht-autorisierende Antwort:
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phpbb.com nameserver = ns2.auth.osuosl.org
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phpbb.com nameserver = ns3.auth.osuosl.org
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phpbb.com nameserver = ns1.auth.osuosl.org
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ns1.auth.osuosl.org internet address = 140.211.166.140
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ns2.auth.osuosl.org internet address = 140.211.166.141
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ns3.auth.osuosl.org internet address = 216.165.191.53
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C:\Users\afischer>nslookup -type=CNAME phpbb.com.
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Server: fi-network.fischer.local
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Address: 10.100.0.254
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phpbb.com
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primary name server = ns1.auth.osuosl.org
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responsible mail addr = hostmaster.osuosl.org
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serial = 1273685403
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refresh = 3600 (1 hour)
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retry = 900 (15 mins)
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expire = 604800 (7 days)
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default TTL = 86400 (1 day)
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Bug
Major
PHPBB-9598 Call checkdnsrr() on Windows with PHP 5.3