Port 4894LysKOM
LysKOM Protocol A facilitates communication in an asynchronous, conferencing-style environment, akin to a fusion of mailing list and forum infrastructures. Designed primarily by Linköping University, it allows multiple users to interact, exchange messages, share documents, and participate in threaded discussions over the network..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 4,092
2 transports registered
payload readable on path
registered with iana
caution
rank 981 of 993 · top 99%
Technical Details
what runs on :4894LysKOM is a distributed conferencing system developed originally at Linköping University, Sweden. It operates on a client-server model with a dedicated protocol named LysKOM Protocol A, functioning over both TCP and UDP. The design aims to support large-scale, threaded conversations with hierarchical discussion structures, persistence of messages, and flexible user group management, similar in nature to bulletin board systems but with richer multiuser features.
Technically, the protocol handles operations like creating conferences, posting articles, managing users, and asynchronous notification of conference events. It transmits structured commands and replies, dynamically handling sessions with mechanisms for authentication and state management. The system is optimized for reliable message delivery and efficient maintenance of user subscriptions, often implemented in academic or organizational environments.
LysKOM emphasizes extensibility by allowing client applications to implement additional functionalities via protocol extensions. This flexibility fosters diversified uses, ranging from academic collaboration to community discussion boards, while maintaining backward compatibility within its stable core protocol.
Security Information
exposure of :4894risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
voice and chat averages 3.9 across 120 ports — this one sits 0.1 above.
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
Common vulnerabilities associated with LysKOM include:
- Lack of encryption, exposing payloads and credentials to eavesdropping.
- Weak authentication schemes, making it susceptible to unauthorized access and session hijacking.
- Protocol misuse for reflection or amplification attacks when endpoints are improperly configured or filtered.
Mitigation strategies involve:
- Encapsulating communication within encrypted tunnels (e.g., VPN or SSH port forwarding) since the native protocol lacks encryption.
- Implementing network access controls using firewalls and ACLs to restrict reachability.
- Applying strong user authentication and regular credential management.
- Monitoring traffic for anomalies and misuse patterns.
- Updating server and client software to patch vulnerabilities and enhance security features over time.
Related Ports
the 8 most looked-up other ports in voice and chat — 120 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9090 | Openfire Admin Console | TCP | Web Services | caution | 34.2k |
| :1513 | Garena Gaming | TCPUDP | Gaming | caution | 33.1k |
| :9091 | Openfire Admin Console (SSL) | TCPtls | Web Services | caution | 28.3k |
| :2031 | Mobrien Chat | TCPUDP | Web Services | caution | 27.7k |
| :1720 | H.323 Signaling | TCP | Network Services | caution | 26.5k |
| :6005 | Camfrog Chat | TCP | Voice and Chat | caution | 25.2k |
| :3001 | Miralix Phone Monitor | TCP | Network Services | caution | 21.7k |
| :9009 | Pichat Server | TCPUDP | Network Services | caution | 19.7k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted