Guide to the Secure Configuration of UnionTech OS Server 20
Rules, Groups, and Values defined within the XCCDF Benchmark
-
SSH Max Sessions Count
Specify the maximum number of open sessions permitted.Value -
Disable SSH Server If Possible
The SSH server service, sshd, is commonly needed. However, if it can be disabled, do so. This is unusual, as SSH is a common method for encrypted and authenticated remote access.Rule High Severity -
Verify Group Ownership on SSH Server Private *_key Key Files
SSH server private keys, files that match the/etc/ssh/*_key
glob, must be group-owned byroot
group.Rule Medium Severity -
Verify Group Ownership on SSH Server Public *.pub Key Files
SSH server public keys, files that match the/etc/ssh/*.pub
glob, must be group-owned byroot
group.Rule Medium Severity -
Verify Ownership on SSH Server Private *_key Key Files
SSH server private keys, files that match the/etc/ssh/*_key
glob, must be owned byroot
user.Rule Medium Severity -
Verify Ownership on SSH Server Public *.pub Key Files
SSH server public keys, files that match the/etc/ssh/*.pub
glob, must be owned byroot
user.Rule Medium Severity -
Verify Permissions on SSH Server Private *_key Key Files
SSH server private keys - files that match the <code>/etc/ssh/*_key</code> glob, have to have restricted permissions. If those files are owned by the <code>root</code> user and the <code>root</code...Rule Medium Severity -
Verify Permissions on SSH Server Public *.pub Key Files
To properly set the permissions of/etc/ssh/*.pub
, run the command:$ sudo chmod 0644 /etc/ssh/*.pub
Rule Medium Severity -
Configure OpenSSH Server if Necessary
If the system needs to act as an SSH server, then certain changes should be made to the OpenSSH daemon configuration file <code>/etc/ssh/sshd_config</code>. The following recommendations can be app...Group -
SSH RekeyLimit - size
Specify the size component of the rekey limit.Value
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