12.1 Conditions for HTTP and FTP filtering
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## 12.1 Conditions for HTTP and FTP filtering

For HTTP and FTP content filtering, the following conditions must be met:

1. Traffic must be controlled by an appropriate protocol inspector.

   An appropriate protocol inspector is activated automatically unless its use is denied by traffic rules. For details, refer to chapter 7.3 Definition of Custom Traffic Rules.

2. Connections must not be encrypted. SSL encrypted traffic (HTTPS and FTPS protocols) cannot be monitored. In this case you can block access to certain servers using traffic rules (see chapter 7.3 Definition of Custom Traffic Rules).

3. FTP protocols cannot be filtered if the secured authentication (SASO) is used.

4. Both HTTP and FTP rules are applied also when the WinRoute's proxy server is used (then, condition 1 is irrelevant). However, FTP protocol cannot be filtered if the parent proxy server is used (for details, see chapter 8.4 Proxy server). In such a case, FTP rules are not applied.

5. If the proxy server is used (see chapter 8.4 Proxy server), It is also possible to filter HTTPS servers (e.g. `https://secure.kerio.com/`). However, it is not possible to filter individual objects at these servers.

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Chapter 12 HTTP and FTP filtering | Contents | 12.2 URL Rules