Learning

September 14, 2021

Contributed by:

S C S

Following are some of the best practices recommended when encountered with Learning functionality issues:

Aslearn process:

Verify that the process aslearn is running.
Check top command output

Check output of ps command by executing the following command:

ps -ax | grep aslearn | grep -v "grep"

Example:

 root@ns\# ps -ax | grep aslearn | grep -v "grep"
 1439  ??  Ss     0:03.86 /netscaler/aslearn -start -f /netscaler/aslearn.conf
 <!--NeedCopy-->

Identify recent configuration commands ran prior to the observed problem by verifying the ns.log file:

/var/log/ns.log
Inspect aslearn logs to check for aslearn messages:

/var/log/aslearn.log
Isolate the profile and security check that is effected
Identify the GUI and CLI command which is failing by executing the following command:

show appfw learningdata <profileName> <securityCheck>

Examples:
- show learningdata test_profile starturl
- show learningdata test_profile crosssiteScripting
- show learningdata test_profile sqLInjection
- show learningdata test_profile csRFtag
- show learningdata test_profile fieldformat
- show learningdata test_profile fieldconsistency
Perform integrity check of sqlite from bsd shell prompt:

nsshell # sqlite3 /var/nslog/asl/<profile_name_in_lowercase>.db 'pragma integrity_check;

Examples:
```
 root@ns# sqlite3 /var/nslog/asl/tsk0247284.db 'pragma integrity_check;'
 ok
 
```
Deploy or remove rules to start learning again:
- If 2000 learn items (per protection) are reached, you cannot start learning any more for that protection
- If 20 MB size is reached for the database, stop learning for all protections
- Restart aslearn process
*/netscaler/aslearn -start -f/netscaler/aslearn.conf*
Check the space in the /var folder by executing the following:

du -h /var
Check the learning threshold limits by executing the following command:

show appfwlearningsettings <profile_name> <securityCheck>
Collect learned data by executing the following command:

export appfwlearningdata <profile_name> <securityCheck>
Ascertain that learned data is uploaded in the collector.

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Learning

September 14, 2021

Contributed by:

S C S

September 14, 2021

Contributed by:

S C S

Learning

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