| Member | Value | Description |
|---|---|---|
| ptNone | 0 | Establish connection without using a proxy server |
| ptSocks4 | 1 | Establish an IPv4 connection to a SOCKS4 proxy server |
| ptSocks4IPv6 | 3 | Establish an IPv6 connection to a SOCKS4 proxy server |
| ptSocks5 | 2 | Establish an IPv4 connection to a SOCKS5 proxy server |
| ptSocks5IPv6 | 4 | Establish an IPv6 connection to a SOCKS5 proxy server |