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Comcast Business Gateway has several remote ports enabled that I didn't configure?
I have the SMC Comcast Business Gateway (SMCD3G)
I have a very specific remote port forwarding configuration, and as a security audit, I recently did a complete port scan of my home IP. I found 6 ports that show as listening, but are not forwarded, which makes me suspicious they're actually services on the gateway itself.
- Port #81 (hosts2-ns): listening
- Port #8080 (http-alt): listening
- Port #13568: listening
- Port #20480: listening
- Port #20736: listening
- Port #47873: listening
I've double and triple checked, I absolutely do not have any of these enabled as port forwarding rules, and none are being used by any of my LAN clients.
I know remote administration for these devices is not available to the customer. I cannot load any of these ports over http or https; I cannot telnet or ssh into any of them either.
Does anyone know what they are? Can they be disabled? Is it possible they are indeed running services that open a security hole to my network? I exercise an abundance of caution and control over my network and would feel much more comfortable knowing what these are doing.
train_wreck
Gold Problem solver
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610 Messages
9 years ago
By "home IP", which one do you mean? Are you talking about a static IP assigned to one of your own devices, or the "default gateway" public IP that is assigned to the SMC?
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