Using pdns internally as a caching server. This is latest 3.1.4
$ dig +short yahoogroups.com NS
ns3.yahoo.com.
ns4.yahoo.com.
ns5.yahoo.com.
ns2.yahoo.com.
ns1.yahoo.com.
$ dig +short lima._domainkey.yahoogroups.com TXT @ns3.yahoo.com
"k=rsa\; p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhAL10WHRWMSb9Tnl+k4Kzpc18rDCTpDT1pbK0xwkdZIZkaP8NB75qa/S57xccZlIwbI22Ooy/IY+8WxQtvE2z4W" "LLNOf9hkMeicUH48TGkEoCAcaSjJz/b3NMrOy9l1U7gQIDAP//"
Notice the apparent two parts to that response. Sending to our pdns caching server:
$ dig +short lima._domainkey.yahoogroups.com TXT @10.202.5.1
"k=rsa\; p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhAL10WHRWMSb9Tnl+k4Kzpc18rDCTpDT1pbK0xwkdZIZkaP8NB75qa/S57xccZlIwbI22Ooy/IY+8WxQtvE2z4W"
The second part of the response appears to be lost.
Our config:
allow-from=10.202.0.0/16
export-etc-hosts=yes
forward-zones=ab.surbl.org=10.202.4.212,be.surbl.org=10.202.4.212,cidr.wpbl.pc9.org=10.202.4.212,jp.surbl.org=10.202.4.212,list.dsbl.org=10.202.4.212,multi.surbl.org=10.202.4.212,ob.surbl.org=10.202.4.212,sbl-xbl.spamhaus.org=10.202.4.212,sbl.spamhaus.org=10.202.4.212,sc.surbl.org=10.202.4.212,ws.surbl.org=10.202.4.212,xbl.spamhaus.org=10.202.4.212
local-address=10.202.5.1
logging-facility=5
Nothing appears in the log about this query.
djb dnscache does seem to return the correct result:
$ dig +short lima._domainkey.yahoogroups.com TXT @127.0.0.1
"k=rsa\; p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhAL10WHRWMSb9Tnl+k4Kzpc18rDCTpDT1pbK0xwkdZIZkaP8NB75qa/S57xccZlIwbI22Ooy/IY+8WxQtvE2z4W" "LLNOf9hkMeicUH48TGkEoCAcaSjJz/b3NMrOy9l1U7gQIDAP//"
