Cisco Cisco Web Security Appliance S170 Guía Del Usuario
9-3
Cisco IronPort AsyncOS 7.0 for Web User Guide
OL-23079-01
Chapter 9 Working with External Proxies
Adding External Proxy Information
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Hash based. The Web Proxy uses a hash function to distribute requests to the
proxies in the group. The hash function uses the proxy ID and URL as inputs
so that requests for the same URL are always directed to the same external
proxy.
proxies in the group. The hash function uses the proxy ID and URL as inputs
so that requests for the same URL are always directed to the same external
proxy.
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Least recently used. The Web Proxy directs a transaction to the proxy that
least recently received a transaction if all proxies are currently active. This
setting is similar to round robin except the Web Proxy also takes into account
transactions a proxy has received by being a member in a different proxy
group. That is, if a proxy is listed in multiple proxy groups, the “least recently
used” option is less likely to overburden that proxy.
least recently received a transaction if all proxies are currently active. This
setting is similar to round robin except the Web Proxy also takes into account
transactions a proxy has received by being a member in a different proxy
group. That is, if a proxy is listed in multiple proxy groups, the “least recently
used” option is less likely to overburden that proxy.
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Round robin. The Web Proxy cycles transactions equally among all proxies
in the group in the listed order.
in the group in the listed order.
For information about creating Routing Policies, see
.
Note
If your network contains an upstream proxy that does not support FTP
connections, then you must create a Routing Policy that applies to all Identities
and to just FTP requests. Configure that Routing Policy to directly connect to FTP
servers or to connect to a proxy group whose proxies all support FTP connections.
connections, then you must create a Routing Policy that applies to all Identities
and to just FTP requests. Configure that Routing Policy to directly connect to FTP
servers or to connect to a proxy group whose proxies all support FTP connections.
Adding External Proxy Information
To define external proxy information, you create a proxy group. A proxy group is
an object that defines a list of proxies and their connection information and the
load balancing technique to use when distributing requests to proxies in the group.
You can create multiple proxy groups and can define multiple proxies within a
group.
an object that defines a list of proxies and their connection information and the
load balancing technique to use when distributing requests to proxies in the group.
You can create multiple proxy groups and can define multiple proxies within a
group.
AsyncOS for Web allows you to enter the same proxy server information multiple
times into the same proxy group. You might want to include the same proxy server
multiple times to allow unequal load distribution among the proxies in the proxy
group.
times into the same proxy group. You might want to include the same proxy server
multiple times to allow unequal load distribution among the proxies in the proxy
group.