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Chapter 4
Micro-Updates
Network interaction
19
Network interaction
Micro-updates are downloaded using standard HTTP requests. If an HTTP 
proxy is not enabled, then at the specified interval, a download will be attempted 
over port 80 by default, or the port configured by “micro-update port” on 
page 16. I
f the filtering server is unable to connect to the Cloudmark micro-
updates service, the most recent offline version of the data file in the etc/
micro_updates directory will be used until the next micro-updates interval 
before attempting to download again.
!
Micro-updates cannot be downloaded if a valid license file is not present. 
Using HTTP proxies
To use an HTTP proxy, set the “http proxy” configuration parameter in 
cartridge.cfg to your proxy server, in one of the following forms:
<host>:<port>
<address>:<port>
If HTTP proxying is enabled, then the port specified will be used. 
If the proxy uses HTTP basic authentication, then set the “http proxy basic auth” 
parameter, in the following form:
<user>:<password>
If the proxy uses NTLM authentication, then set the “http proxy ntlm auth” 
parameter, in the following form:
<domain>:<username>:<password>
Connection timeout logic
The “micro-update timeout” parameter sets the timeout that will be used for all 
network calls. Therefore, this setting is not related to the actual download time—
just the network call.