Cobra Forum

Linux => Networking & Wireless => Topic started by: kalpana on Oct 19, 2023, 06:02 AM

Title: Ubuntu 20.04 not getting IPv6 SLAAC address
Post by: kalpana on Oct 19, 2023, 06:02 AM
Other hosts on the network are.
v4 stack works just fine.
This laptop does get properly addressed when booted to Windows 10
I do get an fe80 address:

Code:
joliver@blinky:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether ec:f4:bb:15:41:6b brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.22/24 brd 192.168.0.255 scope global dynamic noprefixroute eno1
       valid_lft 85576sec preferred_lft 85576sec
    inet6 fe80::8be3:2840:4718:3a80/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether ac:7b:a1:2d:5a:af brd ff:ff:ff:ff:ff:ff

ufw is disabled, but there are ip6tables rules:

Code:

joliver@blinky:~$ sudo ip6tables -L -n --line-numbers
Chain INPUT (policy DROP)
num  target     prot opt source               destination         
1    ACCEPT     all      ::/0                 ::/0               
2    ACCEPT     all      ::/0                 ::/0                 state RELATED,ESTABLISHED
3    LOGGING    all      ::/0                 ::/0               

Chain FORWARD (policy DROP)
num  target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination         

Chain LOGGING (1 references)
num  target     prot opt source               destination         
1    LOG        all      ::/0                 ::/0                 LOG flags 0 level 4 prefix "iptables-fw "
2    DROP       all      ::/0                 ::/0

Not sure whet else might be relevant.