Description
Description
ssh of ipv6 address does not work though ping works. The failure is noticed as part of https://github.com/Azure/sonic-mgmt/blob/master/spytest/tests/system/test_ssh.py where we try to do a ssh on ipv6 address
When I checked the sshd config, by default listen is disabled for ipv6 address and the moment I uncommented the same and restarted sshd service, ssh to ipv6 works.
#Port 22
#AddressFamily any
ListenAddress 0.0.0.0
#ListenAddress :: ===> commented
Seems like the config is mentioned as part of build_debian.sh in sonic-buildimage
Configure sshd to listen for v4 connections; disable listening for v6 connections
sudo sed -i 's/^ListenAddress ::/#ListenAddress ::/' $FILESYSTEM_ROOT/etc/ssh/sshd_config
sudo sed -i 's/^#ListenAddress 0.0.0.0/ListenAddress 0.0.0.0/' $FILESYSTEM_ROOT/etc/ssh/sshd_config
Not sure if why sshd listening on v6 connections is disabled. Do we got to turn it on?
Steps to reproduce the issue:
Describe the results you received:
2021-05-20 20:34:00,609 T0000: INFO [D2-SD2] FCMD: sshpass -p 'cisco123' ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o ConnectTimeout=30 cisco@1001::1 show vlan config
2021-05-20 20:34:00,663 T0000: INFO [D2-SD2] ssh: connect to host 1001::1 port 22: Connection refused
2021-05-20 20:34:00,665 T0000: INFO [D2-SD2] cisco@sonic:~$
Describe the results you expected:
ssh should work ipv6 address
Output of show version:
Seen on latest of master & 202012
(paste your output here)
Output of show techsupport:
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