Bug ID 1469221: SSH access issues due to line wrapping in known_hosts file

Last Modified: Dec 05, 2024

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2

Opened: Dec 26, 2023

Severity: 3-Major

Symptoms

Line wrapping in the known_hosts file introduced the incorrect whitespace in /config/ssh/ssh_known_hosts (generated by /etc/sysconfig/sshd-functions) this makes known_hosts entry non-functional because the contents of the file are space delimited.

Impact

Unable to SSH from one blade to another in a VIPRION or clustered vCMP guest or VELOS tenant, e.g. "ssh 127.3.0.whatever" or "ssh slot2". Unable to SSH to localhost, e.g. "ssh localhost".

Conditions

-- SSHD configuration is modified to specify MaxAuthTries to a value of 3 or lower (the default value for MaxAuthTries is 6).

Workaround

Do not specify a lower-than-default value for MaxAuthTries in the SSHD configuration.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips