Port 1817RKB-OSCS
RKB-OSCS is an obscure TCP/UDP service assignment with no documented public protocol.
- 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 993 of 5,571 · top 18%
Technical Details
what runs on :1817RKB-OSCS is registered on port :1817 over tcp and udp to Robert Kevin Breton. We don't have a technical write-up for it beyond the IANA registry entry.
In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.
find what's listening on :1817
# linux
sudo ss -tulpn 'sport = :1817'
# macos / bsd
sudo lsof -nP -i :1817
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1817nmap -sV -p T:1817 <host>
sudo nmap -sU -sV -p U:1817 <host>run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.
add technical detailsSecurity Information
exposure of :1817risk 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 :1817 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :1817, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :1863 | Microsoft Notification Protocol | TCP | Voice and Chat | caution | 15.9k |
| :1755 | Microsoft Media Services | TCPUDP | Streaming | caution | 13.8k |
| :1812 | RADIUS Auth Protocol | TCPUDP | Security | caution | 12.0k |
| :1801 | MSMQ | TCPUDP | Network Services | caution | 8.9k |
| :1813 | RADIUS Accounting | TCPUDP | Security | caution | 7.2k |
| :1762 | CFT File Transfer | TCPUDP | File Transfer | caution | 5.6k |
| :1761 | Zenworks Remote Control | TCP | Remote Access | caution | 5.6k |
| :1761 | CFT 0 | UDP | Network Services | caution | 5.0k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted