Cisco Cisco Web Security Appliance S160 User Guide
Chapter 5 Web Proxy Services
Configuring the Web Proxy
5-6
Cisco IronPort AsyncOS 7.1 for Web User Guide
OL-23207-01
Persistent
Connection Timeout
Connection Timeout
Enter how long the Web Proxy keeps open a connection
to a client or server after a transaction has been
completed. Keeping a connection open allows the Web
Proxy to use it again for another request.
to a client or server after a transaction has been
completed. Keeping a connection open allows the Web
Proxy to use it again for another request.
For example, after a client finishes a transaction with
google.com, the Web Proxy keeps the connection to the
server google.com open for the amount of time specified
in the server side persistent timeout if no other client
makes a request for google.com.
google.com, the Web Proxy keeps the connection to the
server google.com open for the amount of time specified
in the server side persistent timeout if no other client
makes a request for google.com.
•
Client side. The maximum number of seconds the
Web Proxy keeps a connection open with a client on
the network with no activity from the client.
Web Proxy keeps a connection open with a client on
the network with no activity from the client.
•
Server side. The maximum number of seconds the
Web Proxy keeps a connection open with a
destination server with no activity from any client on
the network to that server.
Web Proxy keeps a connection open with a
destination server with no activity from any client on
the network to that server.
Default is 300 seconds for both client and server side
persistent timeouts.
persistent timeouts.
You might want to increase the server side persistent
timeout if clients on the network frequently connect to
the same server, or if the network has a relatively slow
connection to outside servers.
timeout if clients on the network frequently connect to
the same server, or if the network has a relatively slow
connection to outside servers.
Cisco recommends keeping the default values. However,
you might want to increase or decrease these values to
keep connections open longer to reduce overhead used to
open and close connections repeatedly. Consider that if
you increase the persistent timeout values, you also
reduce the ability of the Web Proxy to open new
connections if the maximum number of simultaneous
persistent connections has been reached.
you might want to increase or decrease these values to
keep connections open longer to reduce overhead used to
open and close connections repeatedly. Consider that if
you increase the persistent timeout values, you also
reduce the ability of the Web Proxy to open new
connections if the maximum number of simultaneous
persistent connections has been reached.
Table 5-1
Web Proxy Settings (continued)
Property
Description