Disabling your Real Servers allows you to perform maintenance or to temporarily disassociate them from a Service. A Real Server that is in disabled, maintenance, or sticky mode will not accept any new connections or requests until it is enabled.
There are two ways to change the status of a Real Server:
- Use the Enable, Disable, Maintenance, or Sticky actions on the BASIC > Server Health page.
- Edit the Real Server on the BASIC > Services page.
If you set the state of a Real Server to Enable, it accepts new requests, connections or sessions.
The following tables describe how servers behave when set in Maintenance, Disable, and Sticky modes depending on the type of service.
Maintenance
| Services | Behavior |
|---|---|
| Layer 4 TCP | Existing connections are handled by the server. No new connections are allowed if either of the following are configured:
|
| TCP Proxy and Secure TCP Proxy | Existing connections are handled by the server. No new connections are allowed. |
| HTTP, HTTPS, Instant SSL | Existing requests and connections are handled by the server. No new requests or connections are allowed. |
| RDP Proxy | Existing connections are handled by the server. No new connections are allowed. |
| Layer 4 and Layer 7 UDP | Existing datagrams continue to reach the server. However, the server is not used for new datagrams. |
| FTP and FTP SSL | Existing and ongoing connections are served by the server. No new connections are allowed. |
Disable
| Services | Behavior |
|---|---|
| Layer 4 TCP | Service for existing requests and connections is stopped immediately. Connections are closed after the time configured for TCP Connections Timeout on the ADVANCED > System Configuration page under System Settings. No new requests or connections are allowed. |
| TCP Proxy and Secure TCP Proxy | Existing requests and connections are dropped immediately. No new requests or connections are allowed. |
| HTTP, HTTPS, Instant SSL | Existing requests and connections are handled by the server. No new requests or connections are allowed. |
| RDP Proxy | No new connections are allowed. |
| Layer 4 UDP | This server is not used for any datagram. |
| Layer 7 UDP | Existing datagrams are handled by the server. The server is not used for new datagrams. |
| FTP and FTP SSL | Existing and ongoing connections are dropped immediately. No new connections are allowed. |
Sticky
| Services | Behavior |
|---|---|
| HTTP, HTTPS, Instant SSL, TCP Proxy, Secure TCP Proxy | New persistence connections are allowed until their persistence timers expire. No new connections are allowed. |
| FTP and FTP SSL | Persistence connections continue to connect to the same server unless the persistence timer has expired. No new connections are allowed. |