Details
Application protocol anomaly detection examines application layer protocols such as FTP to identify attacks based on observed deviations in the normal RFC behavior of a protocol or service. This type of monitoring allows for the detection of known and unknown exploits that exploit weaknesses of commonly used protocols.
Because protocol anomaly analysis examines the application payload for patterns or anomalies, an FTP proxy must be included in the ALG. This ALG will be configured to inspect inbound and outbound FTP communications traffic to detect protocol anomalies such as malformed message and command insertion attacks.
Solution
Configure FTP reverse proxy intermediary services.
See the ProxySG Reverse Proxy WebGuide for details.
1. Log on to the Web Management Console.
2. Click Configuration >> Services >> Proxy Services.
3. Click ‘New Service’ and create new FTP proxy services with the Action set to ‘intercept’.
4. Browse to Configuration >> Forwarding Hosts. Click ‘New’ and create an entry for the desired back-end FTP server. Click ‘Apply’.
5. Browse to Policy >> Visual Policy Manager and click ‘Launch’.
6. Click Policy >> Add Forwarding Layer. In the default rule, set the Action to be the Forwarding Host configured in step 4.
7. Click File >> Install Policy on SG Appliance.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management, System and Communications Protection.This control applies to the following type of system BlueCoat.
References
- 800-53|CM-6b.
- 800-53|SC-7(17)
- CAT|II
- CCI|CCI-000366
- CCI|CCI-001125
- Rule-ID|SV-104217r1_rule
- STIG-ID|SYMP-AG-000240
- Vuln-ID|V-94263