Does anyone have a definitive listing of ports used for FTP over TLS?
Late last year I blocked everything but "essential" protocols for lan to wan and have been unblocking things on an as needed basis.
I added port 990 for "IT", which fixed the FTP/TLS negotiation but I see in pcaps that once it negotiates TLS it then switches to an apparently random port between 50000-56000.
Does anyone have some experience with FTP over TLS? Anything to narrow this range or force a different behavior would be great.
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