[Pkg-nagios-devel] Bug#933658: Bug#933658: monitoring-plugins-standard: check_dns unable to cope with punycode/UTF-8 domains

[Kilian Krause]

Hi Jan,

* Jan Wagner <waja at cyconet.org> [2021-12-20 06:20:31 +0100]:
>thanks for bringing this to our attention.
>
>Am 01.08.19 um 15:26 schrieb Kilian Krause:
>>The current version of check_dns seems to be broken w.r.t. punycode/UTF-8 domains:
>>
>># /usr/lib/nagios/plugins/check_dns -H xn--brckenkurs-mathematik-9hc.de. -s 129.69.252.34
>>DNS CRITICAL - '/usr/bin/nslookup -sil' msg parsing exited with no address
>># /usr/lib/nagios/plugins/check_dns -H brückenkurs-mathematik.de -s 129.69.252.34
>>DNS CRITICAL - '/usr/bin/nslookup -sil' msg parsing exited with no address
>># nslookup -sil brückenkurs-mathematik.de 129.69.252.34
>>Server:         129.69.252.34
>>Address:        129.69.252.34#53
>>
>>Name:   brückenkurs-mathematik.de
>>Address: 129.69.8.19
>>Name:   brückenkurs-mathematik.de
>>Address: 2001:7c0:2041:8::19
>
>$ /usr/lib/nagios/plugins/check_dns -H xn--brckenkurs-mathematik-9hc.de. -s 8.8.8.8
>DNS OK: 0.054 seconds response time. xn--brckenkurs-mathematik-9hc.de. returns 129.69.8.19|time=0.053687s;;;0.000000
>$ dpkg -S /usr/bin/nslookup
>dnsutils: /usr/bin/nslookup
>$ dpkg -l | grep dnsutils
>ii  dnsutils                                                 1:9.10.3.dfsg.P4-12.3+deb9u10      amd64        Clients provided with BIND
>$ cat /etc/debian_version
>9.13
>$ /usr/lib/nagios/plugins/check_dns -V
>check_dns v2.3 (monitoring-plugins 2.3)
>
>Look like it's fixed with monitoring-plugins 2.3 (at least with punycode,
>which seems resonable).

Right. And looking at the nslookup response the UTF-8 attempt is at least
going out correctly.

Thanks!

Best regards,
Kilian