Port 503Intrinsa
Port 503 carries the Intrinsa service over TCP or UDP.
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
2 transports registered
payload readable on path
registered with iana
safe
rank 994 of 1,320 · top 75%
Technical Details
what runs on :503no technical write-up for :503 yet
the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.
Security Information
exposure of :503risk score
1/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
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
no security notes recorded for :503 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :503, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :443 | HTTPS | TCPtls | Web Services | caution | 65.9k |
| :548 | Apple Filing Protocol | TCP | File Transfer | caution | 36.8k |
| :445 | Microsoft-DS / SMB | TCP | File Transfer | caution | 22.3k |
| :445 | SMB over Microsoft-DS | TCP | File Transfer | caution | 21.1k |
| :475 | tcpnethaspsrv | TCP | Security | caution | 20.7k |
| :502 | Modbus Protocol | TCPUDP | Network Services | caution | 19.2k |
| :563 | NNTPS | TCPUDPtls | Web Services | safe | 18.1k |
| :546 | DHCPv6 Client | TCPUDP | Network Services | caution | 16.6k |
risk mix of the 8 listed
- safe13%
- caution88%
2 of 8 encrypted