Here is a list of ports that Sprint block for inbound traffic.
TransPort routers use port 80 for web GUI managementTransPort routers use port 4000 for serial port access over TCP • Sprint blocks certain known IP ports to keep unauthorized traffic from entering the CDN> 80 tcp http (web servers)> icmp echo request ping> 445 tcp/udp NetBIOS shares / drive mappings / windows authentication> 135 tcp/udp NetBIOS shares / drive mappings / windows authentication (Microsoft RPC portmapper)> 137 tcp/udp NetBIOS shares / drive mappings / windows authentication> 138 udp NetBIOS shares / drive mappings / windows authentication> 139 tcp NetBIOS shares / drive mappings / windows authentication> 4000 tcp> 4899 tcp> 1026 udp> 1027 udp There are others, but we can’t release the entire list, these are the main ports that may affect some customers.
Last updated:
Mar 21, 2019