Hello Benoit,
NAPTR is not much used, so its unfortunately expected to hit some bugs when used in a new platform. About the specific clients I cannot comment, sorry.
Funny/sad story, some hosting provider even in Germany removed NAPTR support from the DNS backends, because they did not saw any customer usage and/or don't understand it.
Cheers,
Henning
-----Original Message----- From: Benoit Panizzon via sr-users sr-users@lists.kamailio.org Sent: Montag, 28. April 2025 16:31 To: sr-users@lists.kamailio.org Cc: Benoit Panizzon benoit.panizzon@imp.ch Subject: [SR-Users] OT: Client DNS resolver crashing on NAPTR lookup
Hi List
I hope it is OK to post a slightly off topic question. I have not found any similar reports via google.
During testing of our development platform, I found two independent clients whose resolver process crashes randomly, when performing NAPTR lookups.
Mitel/Aastra 68XXi Phones with Firmware >= 6.4 up to most recent.
Inalp/Patton SNXX (Trinity OS) SIP Gateway with Firmware >= 3.14.X up to most recent.
Both vendors reply they have no prior reports of this issue.
The hostname used as registrar / proxy points to a NAPTR entry, which in turn points to 3 SRV entries für SIP+D2T, SIP+D2U, SIPS+D2T
Each SRV entry then points to 4 IP Addresses (2x ipv4 and 2x ipv6)
So quite a complex lookup and quite large replies. Anyone else observed this issue?
When using a hostname that merely points to the A and AAAA records, no crashes.
Mit freundlichen Grüssen
-Benoît Panizzon-
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