Port 5656IBM Sametime P2P
IBM Sametime Peer-to-Peer (P2P) file transfer typically utilizes port 5656 to facilitate direct exchange of files between clients within a corporate environment. This port supports real-time collaboration by allowing users to quickly share documents or data without routing through a central server, enhancing workflow efficiency..
- transport
- tcp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 2/10
- lookups
- 8,529
single transport
payload readable on path
used by convention
safe
rank 590 of 993 · top 59%
Technical Details
what runs on :5656IBM Sametime is an enterprise instant messaging platform that includes capabilities such as presence awareness, chat, voice and video conferencing, and file transfer. The P2P file transfer component on port 5656 allows clients to establish direct TCP connections, enabling quick and efficient sharing of files without significantly burdening the Sametime server.
When a user initiates a file transfer, a session is negotiated through Sametime’s signaling, after which the clients communicate peer-to-peer over this port. This method enhances transfer speeds and reduces server load but requires that network configurations such as firewalls and NAT traversal support direct client connections.
Port 5656 is typically unofficial and usage is within internal corporate networks. Because it’s a direct transfer channel, network administrators need to be aware of the associated data flows, particularly as they can bypass centralized monitoring systems if improperly configured.
Security Information
exposure of :5656risk score
2/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
file transfer averages 4.1 across 114 ports — this one sits 2.1 below.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common Vulnerabilities:
- Unencrypted data transfers may expose sensitive files to interception.
- Potential for malware propagation via unmonitored peer-to-peer transfers.
- Port exposure could be leveraged for unauthorized access into the corporate network if not properly restricted.
Common Mitigations:
- Enforce strict access controls and internal firewall rules limiting the usage of port 5656.
- Implement file scanning and content filtering to reduce malware risks.
- Use additional encryption layers such as VPNs to secure data exchanges.
- Monitor peer-to-peer traffic to detect anomalous or unauthorized file transfers.
Related Ports
the 8 most looked-up other ports in file transfer — 114 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :17500 | Dropbox LAN Sync | TCPUDP | File Transfer | caution | 43.7k |
| :548 | Apple Filing Protocol | TCP | File Transfer | caution | 36.8k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
| :1337 | PowerFolder P2P | TCP | Security | caution | 27.1k |
| :9001 | SharePoint Authoring | Web Services | caution | 26.3k | |
| :8080 | FilePhile Relay | UDP | File Transfer | caution | 25.6k |
| :1337 | WASTE Encrypted Sharing | TCP | Security | caution | 22.9k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted