Blocking Port 21 for Residential Connection

Question

I spoke with a rep who said COX can't block ports on their end, yet there are multiple articles about how they definitely block ports for everyone's protection. &nbsp;I know COX is blocking my port 21, which yes, I know is not the most secure, but I use it securely enough for my extremely small business (1-person agency) out of my home office. &nbsp;It worked fine, up until COX decided to start blocking it. &nbsp;I know it's COX because I've dug through all of my router's and server's logs for hours and there is nothing about port 21 being blocked. &nbsp;Moreover, I can reset the connection and it works from an outside source for a few seconds before being blocked again. &nbsp;STOP BLOCKING MY PORTS!!

darkatt · Answer

Ports are blocked on the modem itself.&nbsp;https://www.cox.com/residential/support/internet-ports-blocked-or-restricted-by-cox.htmlPort 21 isn't blocked on the modem. if you are using a non cox router, verify it's not blocked on the router.&nbsp;https://canyouseeme.orgEnsure you temporarily turn off your firewall or IT will block the test.&nbsp;Also - https://www.grc.com/default.htm shields up testing for firewall.&nbsp;

widermouthopen · Answer

Have you considered Cox business? They don't block any ports.

cstones · Answer

I know you’re trying to help, but I don’t consider, “Pay $130 more for the same speed and convenience” to be a solution. &nbsp;It worked for a week, until they figure out I was running a server and started blocking it. &nbsp;Then the rep lied about even having that ability when multiple articles and reps in this forum confirm they do….NOT HAPPY.

widermouthopen · Answer

Well, it's not on the list of officially blocked ports, but it could be something local. What model modem do you have?

cstones · Answer

I know it isn't, which is even more infuriating. &nbsp;But COX reps have confirmed in this forum that they block "servers" of any kind. &nbsp;The fact it isn't on that list is why it worked for a week, again, until they saw I had "server" activity going on and blocked it. &nbsp;It's not my NetGear Orbi, again, because it worked for a week and I didn't receive any notifications about it changing its settings, such as suddenly blocking ports.

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Blocking Port 21 for Residential Connection

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