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F5 Networks 303 Exam - Topic 3 Question 28 Discussion

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

-- Exhibit --

-- 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?

Suggested Answer: C

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20 comments · newest first
VA
Valentin 2 months ago
I just hope we get this right on the exam!
AR
Arletta 2 months ago
I agree, the PORT command is often restricted.
BE
Ben 2 months ago
That could be an issue, but I lean towards B.
JA
Jaclyn 2 months ago
But what about C) Active IP address in PORT command?
RO
Ronnie 2 months ago
I feel like that's right too. It makes sense.
LA
Laquita 3 months ago
I think it's B) PORT command disallowed.
LA
Latrice 3 months ago
Surprised to see this error pop up, thought FTP was pretty straightforward!
MA
Marjory 3 months ago
I thought automap would handle this, but maybe not?
KR
Kristal 3 months ago
Wait, could it be C? The active IP might be causing the problem.
RO
Rossana 3 months ago
Totally agree, that error usually means the PORT command isn't accepted.
FR
Francesco 3 months ago
B) PORT command disallowed is likely the issue.
NO
Nobuko 4 months ago
I didn't know FTP could throw such specific errors!
GA
Gaynell 4 months ago
Wait, are we sure it's not the active IP in the PORT command?
XO
Xochitl 4 months ago
I thought the LIST command could be the problem too.
ME
Mendy 6 months ago
Totally agree, that's a common issue with FTP setups.
BR
Brianne 6 months ago
Looks like the PORT command is disallowed.
LA
Lang 6 months 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?
FR
Franklyn 6 months ago
I feel like the LIST command was mentioned in another practice question, but I don't think that's the issue here.
RO
Rosina 7 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?
DE
Denna 7 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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