Hi Andreas,
Am 26.06.2023 um 11:13 schrieb Andreas B:
Hi,
I'm very puzzled by the behaviour of ipv6 temp addresses on Debian 12.
Expected behaviour: as soon as a temp address becomes deprecated, a
new one is generated. This is the behaviour on Debian 11.
Reasonable expectation, I think.
...
Tested on two different machines; the problem exist on both.
Seems to work correctly on my single Debian 12 system:
$ ip -6 a | sed -e 's/[0-9a-f]\{1,4\}:/XXXX:/g'
XXXX: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
XXXX: enoXXXX: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:bef4/64 scope global
temporary dynamic
valid_lft 86180sec preferred_lft 14180sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:71be/64 scope global
temporary deprecated dynamic
valid_lft 86180sec preferred_lft 0sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:4c58/64 scope global
temporary deprecated dynamic
valid_lft 86180sec preferred_lft 0sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:267a/64 scope global
temporary deprecated dynamic
valid_lft 86180sec preferred_lft 0sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:d25b/64 scope global
temporary deprecated dynamic
valid_lft 86180sec preferred_lft 0sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:2cee/64 scope global
temporary deprecated dynamic
valid_lft 86180sec preferred_lft 0sec
inet6 XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:4717/64 scope global
dynamic mngtmpaddr noprefixroute
valid_lft 86180sec preferred_lft 14180sec
inet6 XXXX::XXXX:XXXX:XXXX:ce35/64 scope link noprefixroute
valid_lft forever preferred_lft forever
This is using network manager with simple default settings, the IPv6
address is correctly auto-generated.
Settings are
/proc/sys/net/ipv6/conf/all/temp_prefered_lft: 86400
/proc/sys/net/ipv6/conf/all/temp_valid_lft: 604800
/proc/sys/net/ipv6/conf/all/use_tempaddr: 0
/proc/sys/net/ipv6/conf/default/temp_prefered_lft: 86400
/proc/sys/net/ipv6/conf/default/temp_valid_lft: 604800
/proc/sys/net/ipv6/conf/default/use_tempaddr: 0
/proc/sys/net/ipv6/conf/eno1/temp_prefered_lft: 86400
/proc/sys/net/ipv6/conf/eno1/temp_valid_lft: 604800
/proc/sys/net/ipv6/conf/eno1/use_tempaddr: 2
/proc/sys/net/ipv6/conf/lo/temp_prefered_lft: 86400
/proc/sys/net/ipv6/conf/lo/temp_valid_lft: 604800
/proc/sys/net/ipv6/conf/lo/use_tempaddr: -1
Arno
--
Arno Lehmann
IT-Service Lehmann
Sandstr. 6, 49080 Osnabrück
