Vulnerable port open, Port 20005, Error code: 9003, Error code: 4716
Upon scanning LAN network shows ports open: 22, 23, 53 and 80 all are fine OFC. But then 20005 port xcept 4 port btx open (German Telekom’s CEPT videotext service). Searching google and Reddit showed this is some what "security flaw " related to usb storage. I do have a usb modem for internet backup connected.
I tried these Potential Solutions:
-
Update Firmware: no updates.
-
Port Forwarding Configuration: i don't have any.
-
Disabled (UPnP).
-
Disabled parental controls, because removing the list is too much work.
-
Service Filtering: tried to set a rule like:
"Service Type: Any(ALL)
Protocol:
TCP
Starting Port: 20005
Ending Port: 20005
Service Type: btx
Filter Service For:All IP Addresses"
-What actually got saved and isn't active (bulb icon active), and cant be deleted or edited (Error code: 9003 Invalid value.):
Trying to delete:
Now scanning shows port closed!
What is going on?