[asterisk-bugs] [JIRA] (ASTERISK-28004) PjSIP dns breaks when using ::1 in /etc/resolv.conf

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=244429#comment-244429 ] 

Asterisk Team commented on ASTERISK-28004:
------------------------------------------

Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution.

A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report.

Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process].

> PjSIP dns breaks when using ::1 in /etc/resolv.conf
> ---------------------------------------------------
>
>                 Key: ASTERISK-28004
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28004
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: pjproject/pjsip
>    Affects Versions: 13.22.0
>         Environment: CentOS 7.4 64bit
>            Reporter: Isaac McDonald
>              Labels: pjsip
>
> PJSIP DNS resolution breaks when using the IPv6 loopback address as a nameserver in /etc/resolve.conf.
> Steps to reproduce: Note that the hostname used in the AOR had a TTL of 60 seconds during my testing to force pjsip not to cache the results
> 1. Install dnsmasq "yum install dnsmasq"
> 2. create /etc/dnsmasq.d/dns.conf and add the following:
> listen-address=::1,127.0.0.1
> no-resolv
> server=1.1.1.1
> 3. Set nameserver in /etc/resolv.conf to IPv6 localhost address:
> nameserver ::1
> 4. Create a pjsip trunk to register with a hostname in the aor. example:
> contact=sip:someuser at testhost.example.com:5060
> 5. Note how SIP registrations to the sip trunk fail. Note how calls via the trunk also fail. It may take a few minutes before you get failures. 
> 6. Note the following messages in the asterisk log:
> 'No working DNS nameserver (PJLIB_UTIL_EDNSNOWORKINGNS)' sending OPTIONS request to endpoint
> 7. Change the nameserver in /etc/resove.conf to:
> nameserver 127.0.0.1
> 8. Reload asterisk "asterisk -rx"core reload"
> 9. Note how the trunk created in step 4 registers. Calls placed via the trunk also complete.



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