il
a05951f883
update notes: - add http_status and http_verb for each expressions (actual budget, immich, opencloud) - fix crowdsec and issues documents
35 lines
1.2 KiB
Markdown
35 lines
1.2 KiB
Markdown
# Actual Budget crowdsec false positive issue
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## Status
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- Finished
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## Date
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- 2026-03-21
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## Version
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- Actual Budget: 26.3.0
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## Problem
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- When users access and log in actual budget, all connections to homelab services are refused.
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- fw ban users' IP address.
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## Reason
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- Actual budget has local first policy.
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- When the user log in actual budget, the client downloads all sql files from the server.
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- LAPI decides that as an attack which sensitive file(sql) is downloaded concurrently.
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## Timeline
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- 2026-03-21: Release actual budget
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- 2026-03-21: Find the false positive case, and add whitelist
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- 2026-05-07: Optimize whitelist expression
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## Solution
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- Access to fw
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- Check the ban list with `sudo cscli alerts list`
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- Read the ban case with `sudo cscli alerts inspect $NUMBER`
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- Add expressions on whitelist
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- evt.Meta.target_fqdn == '{{ services['actualbudget']['domain']['public'] }}.{{ domain['public'] }}' && evt.Meta.http_status in ['200', '304'] && evt.Meta.http_verb == 'GET' && evt.Meta.http_path contains '/data/migrations/'
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- Delete false positive decision
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- Check false positive decision with `sudo cscli decision list`
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- Delete false positive decision with `sudo cscli decision delete --id $ID`
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