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

[Kilian Krause]

Hi Jan,

* Jan Wagner <w...@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