dropbear does not handle IPv6

[Kai Blin]

Binary package hint: dropbear

On Ubuntu 9.04, the dropbear ssh daemon does not handle IPv6 connections. This applies to version 0.52-1 of the package. However, Ubuntu 9.10 ships 0.52-2, so the lack of IPv6 support probably exists there as well.

[Matt Johnston (matt-ucc)]

Dropbear should handle IPv6 fine, and the Debian stable 0.51-1 package works fine (dbclient and dropbear, connecting to IPv6 hosts on the local network by IP). What does "netstat -antp|grep dropbear" as root say?

Matt
Dropbear Developer

[Kai Blin (kai.blin)]

Hi Matt, thanks for the quick reply.
Output from netstat is
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2178/dropbear
tcp 0 0 10.224.0.52:22 10.224.0.4:41875 ESTABLISHED 2210/dropbear

There's nothing listening on a tcp6 port, even though the machine picked up a global IPv6 address from my radvd.

[Mouse (a-kachalov)]

There is a patch adding support for IPv6 to DropBear:
http://<email address hidden>/msg00576.html

[Matt Johnston (matt-ucc)]

Sounds like the bug fixed in 2011.54.

Support for ipv6 TCP forward numeric addresses isn't there yet (#3) but I don't think that's what this bug is about.

[Angel Abad (angelabad)]

Fixed in 2011.54-1 upload.

Regards,