Package: libc6 Severity: normal Tags: ipv6 Dear Maintainer,
I'm currently traveling though Thailand where many DNS servers (as received via DHCP) seem to be somewhat misconfigured: they resolve all address correctly but fail to send the "ra" flag (recursion available) flag. When I'm connected to such a server and and call "dig A [domainname]" or dig AAAA [domainname]", the answer always contains the line "WARNING: recursion requested but not available" and reports "flags: qr rd". Now when I invoke e.g. wget on a domain that's has both ipv4 and ipv6 addresses, the domain is resolved correctly: $ wget google.de Resolving google.de (google.de)... 61.91.18.123, 61.91.18.98, 61.91.18.113, ... Connecting to google.de (google.de)|61.91.18.123|:80... connected. But if the domain only has an ipv4 address, it cannot be resolved: $ wget keimform.de Resolving keimform.de (keimform.de)... failed: Name or service not known. wget: unable to resolve host address ‘keimform.de’ dig and host, however, correctly resolve the ipv4 address for the latter domain ("keimform.de has address 46.38.235.211"). ping is able to connect to both domains as well. But all other programs I tried (wget, telnet, curl, ftp, iceweasel, icedove, xchat etc.) claim that domains which only have an ipv4 address are unresolveable. I therefore assume that the DNS resolver treats the missing "ra" flag sent by the DNS server in an inconsistent and illogical way: domains that have an ipv6 address are resolved correctly but domains that only have an ipv4 address are considered as unresolveable, even though my network connection is via IPv4 and the DNS server has returned the right answer. The expected outcome would be that, when connected via Pv4, all programs can resolve all domains that have an ipv4 address, regardless of whether or not the DNS server sends the "ra" flag (possibly with a warning logged somewhere if it doesn't). -- System Information: Debian Release: jessie/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.10-3-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org