User Guide

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IRONPORT ASYNCOS 6.3 FOR WEB USER GUIDE
Persistent 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.
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.
• 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.
• 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.
Default is 300 seconds for both client and server side 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.
IronPort 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.
In-Use Connection
Timeout
Enter how long the Web Proxy waits for more data from an idle client
or server when the current transaction has not been completed.
For example, if a client opens a connection and sends only half of the
request, the Web Proxy waits for the amount of time specified for the
client side reserve timeout for the rest of the request before closing the
open connection.
• Client side. The maximum number of seconds the Web Proxy keeps
a connection open with an idle client.
• Server side. The maximum number of seconds the Web Proxy
keeps a connection open with an idle destination server.
Default is 300 seconds for both client and server side reserve
timeouts.
Simultaneous Persistent
Connections (Server
Maximum Number)
Enter the maximum number of connections (sockets) the Web Proxy
keeps open with servers.
Table 5-1 Web Proxy Settings (Continued)
Property Description