The exhibit shows the configuration of aSelf IPwith:
Port Lockdown: Allow Custom
ACustom Listthat includes the following TCP ports:
443
22
Meaning of these ports:
TCP 443→ HTTPS (TMUI — web-based management)
TCP 22→ SSH (command-line remote access)
No other TCP, UDP, or protocol entries are listed; therefore, only these two services are allowed to reach the BIG-IP via this Self IP.
Evaluating the answer choices:
Option
Service
Port
Allowed?
FTP
TCP 21
Not listed
Not allowed
SSH
TCP 22
Listed
Allowed
Telnet
TCP 23
Not listed
Not allowed
Thus,SSHis the only traffic permitted through this Self IP configuration.
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