Port 411Direct Connect Hub
Direct Connect is a peer-to-peer file sharing protocol allowing users to share files over a decentralized network. Port 411 is the default port used by Direct Connect hubs, serving as the central meeting point for clients connecting to the network. These hubs coordinate user connections, manage chat and file searches, and facilitate file transfers between clients..
- transport
- tcp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 6,286
single transport
payload readable on path
used by convention
caution
rank 803 of 993 · top 81%
Technical Details
what runs on :411Direct Connect (DC) operates as a hub-centric peer-to-peer protocol where clients connect to a central hub over TCP, commonly on port 411. The hub acts as a directory, enabling clients to search for files, initiate chats, and manage user presence. While hubs don't serve files themselves, they coordinate connections and provide metadata about available files across the network.
Clients communicate with the hub using a text-based protocol, sending search queries and receiving results. Once users locate files, direct client-to-client transfers are established, often over separate ports negotiated dynamically. The hub maintains user lists and enforces sharing rules or restrictions to maintain network health.
Port 411 is open by default in many DC hub implementations such as YnHub or Verlihub, though custom configurations may use alternative ports. It is generally unencrypted, relying on TCP for data integrity but lacking inherent confidentiality or strong authentication mechanisms.
Security Information
exposure of :411risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
file transfer averages 4.1 across 114 ports — this one sits 0.1 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:
- Lack of encryption leads to exposure of file listings, chat communications, and metadata to potential eavesdroppers.
- Poor authentication mechanisms can allow unauthorized access, hub takeovers, or spam.
- Hubs may be vulnerable to DoS attacks aimed at overwhelming resources.
- Potential distribution of malware or illegal content via the network.
Common Mitigations:
- Use strong authentication policies and user access controls within the hub.
- Implement firewall rules restricting access where appropriate.
- Employ network segmentation to limit exposure.
- Monitor network traffic for abnormal behaviors or illegal file sharing.
- Where possible, utilize updated versions supporting SSL/TLS encryption to enhance privacy.
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