A.8.23 Web filtering
Manage access to external websites to reduce exposure to malicious content.
15
artefacts
4
held by a system
4
at each review
moderate
to go live
SIEM / log platform
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
- Proxy server access logs (sample) · SIEM / log platform
- Firewall web filtering logs (sample) · SIEM / log platform
- Log retention schedule · SIEM / log platform
- Phishing simulation results related to web usage · Endpoint management (MDM / EDR)
periodic reviewEvidence produced at each review
- Evidence of periodic review schedule · Document repository
- Approved exception records · Document repository
- Exception review meeting minutes · Policy repository / GRC workspace
- Attendance records for web filtering training · HR system / LMS
governing documentDocuments that govern the control
- Web filtering policy document · Policy repository / GRC workspace
- Roles and responsibilities matrix for web filtering · Policy repository / GRC workspace
- Change control records for policy updates · Policy repository / GRC workspace
- Approved URL categories list · Document repository
- Blocked URL categories list · Document repository
- Web filtering exception request forms · Document repository
- User awareness training materials on safe browsing · HR system / LMS
First move
Start with the 4 of 15 artefacts that already live in a system (SIEM / log platform); keep the periodic reviews but log each one as a dated record with a named reviewer.
Common gaps auditors find
- Outdated URL category lists
- Insufficient logging retention
- No documented exception process
- Lack of periodic policy review
Do this for your whole sheet
Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.
Build my evidence sheet