| SOCKS | 
| 
 | 
Description | Glossary | RFCs | Publications | Obsolete RFCs | 
| Protocol suite: | TCP/IP. | 
| Protocol type: | Application layer protocol. | 
| Multicast addresses: | |
| Ports: | 1080 (TCP). | 
| URI: | |
| MIME subtype: | |
| SNMP MIBs: | |
| Working groups: | aft, Authenticated Firewall Traversal. | 
| Links: | 
| MAC header | IP header | TCP header | SOCKS message | Data ::: | 
| Method | Description | References | 
|---|---|---|
| 0 | No Authentication Required. | RFC 1928 | 
| 1 | GSSAPI. | RFC 1928 | 
| 2 | Username/Password. | RFC 1929 | 
| 3 | Challenge-Handshake Authentication Protocol. | |
| 4 | ||
| 5 | Challenge-Response Authentication Method. | |
| 6 | Secure Sockets Layer. | |
| 7 | NDS Authentication. | |
| 8 | Multi-Authentication Framework. | |
| 9 - 127  | 
    ||
| 128 - 254  | 
    Private Methods. | RFC 1928 | 
| 255 | No Acceptable Methods. | RFC 1928 | 
RFCs:
[RFC 1928] SOCKS Protocol Version 5.
[RFC 1929] Username/Password Authentication for SOCKS V5.
[RFC 1961] GSS-API Authentication Method for SOCKS Version 5.
[RFC 3089] A SOCKS-based IPv6/IPv4 Gateway Mechanism.
| 
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Description | Glossary | RFCs | Publications | Obsolete RFCs |