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Att gateway firmware restricting use of port 22, why? Need for connecting to business servers.

After numerous hours spent over days spanning months now, I have learned, from ATT tech support that ATT has chosen, for reasons not known to ATT Tech support, to restrict residential gateways connected to copper wire (instead of fiber), from being able to utilize Port 22.  (This was a “surprise” to

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port range conflicts with reserved port (22)

ssh is the standard for secure connections between networked computers, , and 22 is the standard port used by ssh.For secure connections (over the internet) to my home computer, I had my u-verse modem forward port 22 to my desktop machine.(On the modem Arris NVG599, this type of setup option is in t

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