Had the same problem, but adding "-4" to SSHD_OPTIONS didn't solved, maybe because I couldn't properly reinitialize sshd.
Had to reenable IPv6 with
sudo sysctl net.ipv6.conf.all.disable_ipv6=0
Had the same problem, but adding "-4" to SSHD_OPTIONS didn't solved, maybe because I couldn't properly reinitialize sshd.
Had to reenable IPv6 with
sudo sysctl net.ipv6. conf.all. disable_ ipv6=0