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SIP Trunk FQDN DNS lookup does not work, but others do....

finest

MIS
May 11, 2011
77
US
IPO is unable to do this dns lookup (this is our SIP provider's FQDN)

2025-05-23T20:25:24 85354mS DNS: Local Query xxxxxx-sip.apeiron.io to 8.8.8.8
2025-05-23T20:25:24 85366mS DNS: Local Response xxxxxx-sip.apeiron.io result=8180:questions=1,answer RRs=0,authority RRs=1,additional RRs=0


xxxxxx is masking our true fqdn.
i can do nslookup from same network using same dns server and it works just fine

youll see it does not receive any response.....

but it can do this one:

2025-05-23T20:25:40 101527mS DNS: Local Query mail.smtp2go.com to 8.8.8.8
2025-05-23T20:25:40 101534mS DNS: Local Response mail.smtp2go.com result=8180:questions=1,answer RRs=10,authority RRs=0,additional RRs=0
2025-05-23T20:25:40 101535mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=173.255.233.87
2025-05-23T20:25:40 101535mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=45.56.87.145
2025-05-23T20:25:40 101536mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=45.79.71.155
2025-05-23T20:25:40 101536mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=66.228.43.14
2025-05-23T20:25:40 101536mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=172.234.246.155
2025-05-23T20:25:40 101537mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=45.79.170.99
2025-05-23T20:25:40 101537mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=45.33.53.153
2025-05-23T20:25:40 101537mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=45.79.114.202
2025-05-23T20:25:40 101538mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=172.234.246.156
2025-05-23T20:25:40 101538mS DNS: RR: QType=0001 QClass=0001 ttl=244 name=mail.smtp2go.com target= ipaddr=143.42.182.164
2025-05-23T20:25:40 101538mS SMTP: SMTPServer callback invoked from DNS server.
2025-05-23T20:25:40 101546mS SMTP: SMTPServer woken up... Session 00000000 Client 00000000 State 1 Q Size 1 current_message 00000000
2025-05-23T20:25:40 101546mS DNS: mail.smtp2go.com DNS - refreshing: have valid (not used) result


its set to use dns on 8.8.8.8
i also tried with 1.1.1.1 and 1.0.0.1 and 8.8.4.4
 

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