Cisco Cisco Web Security Appliance S170 Guía Del Usuario
10-4
Cisco IronPort AsyncOS 7.7 for Web User Guide
Chapter 10 Working with External Proxies
Evaluating Routing Policy Group Membership
Evaluating Routing Policy Group Membership
After the Web Proxy assigns an Identity to a client request, it evaluates the request against the other
policy types to determine which policy group it belongs for each type. Any request that does not get
terminated due to failed authentication gets evaluated against the Routing Policies to determine from
where to fetch the data.
policy types to determine which policy group it belongs for each type. Any request that does not get
terminated due to failed authentication gets evaluated against the Routing Policies to determine from
where to fetch the data.
Once the Web Proxy assigns a Routing Policy group to a request, it fetches the content from the location
configured for the policy group, either from a configured proxy group or directly from the server.
configured for the policy group, either from a configured proxy group or directly from the server.
To determine the policy group that a client request matches, the Web Proxy follows a specific process
for matching the group membership criteria. During this process, it considers the following factors for
group membership:
for matching the group membership criteria. During this process, it considers the following factors for
group membership:
•
Identity. Each client request either matches an Identity, fails authentication and is granted guest
access, or fails authentication and gets terminated. For more information about evaluating Identity
group membership, see
access, or fails authentication and gets terminated. For more information about evaluating Identity
group membership, see
•
Authorized users. If the assigned Identity requires authentication, the user must be in the list of
authorized users in the Routing Policy group to match the policy group.
authorized users in the Routing Policy group to match the policy group.
•
Advanced options. You can configure several advanced options for Routing Policy group
membership. Some options (such as proxy port and URL category) can also be defined within the
Identity. When an advanced option is configured in the Identity, it is not configurable in the Routing
Policy group level.
membership. Some options (such as proxy port and URL category) can also be defined within the
Identity. When an advanced option is configured in the Identity, it is not configurable in the Routing
Policy group level.
The information in this section gives an overview of how the appliance matches client requests to
Routing Policy groups. For more details about exactly how the appliance matches client requests, see
Routing Policy groups. For more details about exactly how the appliance matches client requests, see
The Web Proxy sequentially reads through each policy group in the policies table. It compares the client
request status to the membership criteria of the first policy group. If they match, the Web Proxy applies
the policy settings of that policy group.
request status to the membership criteria of the first policy group. If they match, the Web Proxy applies
the policy settings of that policy group.
If they do not match, the Web Proxy compares the client request to the next policy group. It continues
this process until it matches the client request to a user defined policy group. If it does not match a user
defined policy group, it matches the global policy group. When the Web Proxy matches the client request
to a policy group or the global policy group, it applies the policy settings of that policy group.
this process until it matches the client request to a user defined policy group. If it does not match a user
defined policy group, it matches the global policy group. When the Web Proxy matches the client request
to a policy group or the global policy group, it applies the policy settings of that policy group.
Matching Client Requests to Routing Policy Groups
shows how the Web Proxy evaluates a client request against the Routing Policy
groups.