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Administration Guide
Server security : Remote access filters
 

Remote access filters

The Progress Application Server (PAS) is configured with filters that allow you to deny access based on IP addresses or host names. These filters are implemented as valves in the PAS instance's /conf/server.xml file. The following snippet from the default server.xml shows that the filters are set to allow access by anyone:
<Valve className="org.apache.catalina.valves.RemoteHostValve"
allow=".*"/>
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
allow=".*"/>
The RemoteHostValve and RemoteAddrValve filters can take two attributes:
allow
A comma-delimited list of regular expressions that a client must match in order to be allowed access.
deny
A comma-delimited list of regular expressions that, when matched, excludes a client from access.