Bug ID 680112: SWG-Explicit rejects large POST bodies during policy evaluation

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP SWG(all modules)

Known Affected Versions:
12.1.2, 12.1.3,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,

Fixed In:

Opened: Aug 24, 2017

Severity: 3-Major

Related Article: K18131781


When an access profile of type SWG-Explicit is being used, there is a 64 KB limit on POST bodies while the policy is being evaluated. ==> /var/log/apm <== err tmm[13751]: 01490514:3: (null):Common:00000000: Access encountered error: ERR_NOT_SUPPORTED. File: ../modules/hudfilter/access/access.c, Function: hud_access_process_ingress, Line: 3048


Unable to start an SWG-Explicit policy with a large POST body.


This applies only during the policy evaluation. After the policy has been set to 'Allow', there is no limit.



Fix Information

Modify the db variable 'tmm.access.maxrequestbodysize' with a value larger than the maximum post body size you would like to support. The maximum supported value is 25000000 (25 MB).

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips