Bug#563552: libc: resolver doesn't fallback to secondary dns-server when first is ipv6 and unreachable
tag 563552 + unreproducible tag 563552 + moreinfo Luca Bruno a écrit : Package: libc6 Version: 2.10.2-2 Severity: normal Tags: ipv6 Standard glibc resolver (ie. gethostbyname()co., symptomatically observed in all programs using it) doesn't use secondary DNS nameserver even if correctly set, when the first one is an ipv6 one and is temporarily unavailable. Let's say /etc/resolv.conf contains just two nameserver lines, like this: nameserver 2001:1418:10:2::2 nameserver 8.8.8.8 If the first one doesn't reply, the second one is never tried. tcpdump shows that no connection to that is even attempted. The fallback mechanism works, instead, when the primary is ipv4 (unavailable itself, too). It is not something I am able to reproduce here, so it may be due to your configuration setup. How do you test that? Using getent ahosts? Do you have ipv6 available on the machine? Have you changed /etc/gai.conf or have other lines in /etc/resolv.conf? -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Processed (with 5 errors): Re: Bug#563552: libc: resolver doesn't fallback to secondary dns-server when first is ipv6 and unreachable
Processing commands for cont...@bugs.debian.org: tag 563552 + unreproducible Bug #563552 [libc6] libc: resolver doesn't fallback to secondary dns-server when first is ipv6 and unreachable Added tag(s) unreproducible. tag 563552 + moreinfo Bug #563552 [libc6] libc: resolver doesn't fallback to secondary dns-server when first is ipv6 and unreachable Added tag(s) moreinfo. Luca Bruno a écrit : Unknown command or malformed arguments to command. Package: libc6 Unknown command or malformed arguments to command. Version: 2.10.2-2 Unknown command or malformed arguments to command. Severity: normal Unknown command or malformed arguments to command. Tags: ipv6 Unknown command or malformed arguments to command. Too many unknown commands, stopping here. Please contact me if you need assistance. Debian bug tracking system administrator (administrator, Debian Bugs database) -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#563552: libc: resolver doesn't fallback to secondary dns-server when first is ipv6 and unreachable
Package: libc6 Version: 2.10.2-2 Severity: normal Tags: ipv6 Standard glibc resolver (ie. gethostbyname()co., symptomatically observed in all programs using it) doesn't use secondary DNS nameserver even if correctly set, when the first one is an ipv6 one and is temporarily unavailable. Let's say /etc/resolv.conf contains just two nameserver lines, like this: nameserver 2001:1418:10:2::2 nameserver 8.8.8.8 If the first one doesn't reply, the second one is never tried. tcpdump shows that no connection to that is even attempted. The fallback mechanism works, instead, when the primary is ipv4 (unavailable itself, too). Cheers, Luca -- .''`. ** Debian GNU/Linux ** | Luca Bruno (kaeso) : :' : The Universal O.S.| lucab (AT) debian.org `. `'` | GPG Key ID: 3BFB9FB3 `- http://www.debian.org | Debian GNU/Linux Developer pgpnjcx4LBUi3.pgp Description: PGP signature
