F5 Networks 303 Exam - Topic 3 Question 28 Discussion

Actual exam question for F5 Networks's 303 exam

Question #: 28
Topic #: 3

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is investigating reports that users are unable to perform some commands through an FTP virtual server. The users are receiving the FTP error "500 Illegal PORT command." The virtual server is configured to SNAT using automap. The LTM Specialist performs a capture on the server side of the LTM device.

Why is the server returning this error?

ALIST command disallowed

BPORT command disallowed

CActive IP address in PORT command

DActive IP address in LOGIN command

Show Suggested Answer

Suggested Answer: C

by Yaeko at Apr 10, 2026, 12:31 AM

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Mendy

20 days ago

Totally agree, that's a common issue with FTP setups.

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Brianne

25 days ago

Looks like the PORT command is disallowed.

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Lang

1 month ago

I'm a bit confused about the difference between the active IP address in the PORT command and the LOGIN command. Which one is more likely to cause this error?

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Franklyn

1 month ago

I feel like the LIST command was mentioned in another practice question, but I don't think that's the issue here.

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Rosina

2 months ago

I remember practicing a similar question where the issue was about the active IP address in the PORT command. Could that be it?

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Denna

2 months ago

I think the error might be related to the PORT command being disallowed, but I'm not entirely sure.

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