A BIG-IP Administrator has configured a BIG-IP cluster with remote user authentication against dcOl f5trn.com. Only local users can successfully log into the system. Configsync is also failing. Which

`ntpq` is used to query NTP (Network Time Protocol) servers and check the clock synchronization status of the BIG-IP device. Incorrect time synchronization can cause authentication failures (especially with directory services) and ConfigSync issues. E: `dig` is a command-line tool for querying DNS name servers to verify name resolution. If remote authentication against a domain controller is failing, a DNS resolution issue preventing the BIG-IP from locating the domain controller is a primary suspect.

`pam_timestamp_check` relates to the validity of PAM timestamps, which is less likely to be the direct cause of both remote authentication and ConfigSync failures compared to fundamental network services.

`pwck` checks the integrity of the /etc/passwd file, which is relevant for local user accounts but not directly for remote authentication failures or ConfigSync.