Preview Tool

Cisco Bug: CSCus22943 - Range request handling can cause high bandwidth usage

Last Modified

Dec 14, 2018

Products (1)

  • Cisco Web Security Appliance

Known Affected Releases

7.1.3-014 7.1.4-053 7.5.0-000 7.5.1-000 7.7.0-000 8.0.0-000 8.0.6-078 8.0.6-119 8.5.1-021

Description (partial)

WSA can use high bandwidth with numerous client making range requests for a large object

Numerous clients making range requests for a large object


- AVC configured to restrict/block an application
- Safe search or site content rating enabled

Related Community Discussions

Issues with WSA and Akamai
For over a month now we have had major issues with our WSAs running 8.0.6-119 and Akamai. First it started on a VM WSA and now on our physical WSAs that we just put into production. Basically we will notice all of our bandwidth is in use and using a packet sniffer we see a WSA talking to an Akamai website and consuming it all. When first troubleshooting it I would see about 160MB downloaded in about 20 seconds but when I look in the packets and match the traffic to a user the WSA shows maybe 5MB ...
Latest activity: Nov 07, 2016
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.