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Level 7

PASV Connection Error

Could you please tell me what causes the error "Unable to find matching request for PASV connection from XX.XX.XX.XX" where the Xs are an IP address? We are experiencing this error repeatedly on high-traffic servers and can find no publicly available documentation on the error.

Any input or direction would be greatly appreciated.

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Level 15

Hi jmorganthall, I'm looking for an answer for you.

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Many thanks. We've gotten a few possible leads as to what might be causing this, but any additional insight would be tremendous.

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jmorganthall, am I right saying you have quite old version of Serv-U? Probably version 6? I know this is not what you want to hear, but I really recommend you to upgrade as this one is end of life for a long time.

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