Port 4047Context Transfer Protocol
Context Transfer Protocol traffic used by access routers to move connection state during mobile-node handovers.
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 2/10
- lookups
- 0
2 transports registered
payload readable on path
registered with iana
safe
rank 994 of 1,196 · top 83%
also known as ctp-state, CTP
Technical Details
what runs on :4047Context Transfer Protocol transfers network and application state from a previous access router to a new access router so an ongoing session can continue across a handover. The IANA assignment covers both TCP and UDP on port 4047; deployments use protocol messages to request, deliver, and acknowledge context, with the communicating routers providing the relevant transport and security configuration. It is a specialized mobility protocol and has no commonly associated companion service port.
Security Information
exposure of :4047risk score
2/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
network services averages 3.7 across 660 ports — this one sits 1.7 below.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Traffic is not encrypted by default by virtue of the port assignment. Exposure should normally be limited to trusted access routers, because spoofed or unauthorized context-transfer messages could disrupt handovers or inject inappropriate state; there is little reason for this service to be reachable from the public Internet.
Related Ports
the 8 most looked-up other ports in network services — 660 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :5938 | TeamViewer | TCPUDP | Remote Access | caution | 65.0k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted