86 Zeilen
3,5 KiB
Markdown
86 Zeilen
3,5 KiB
Markdown
## Additional Databases for ClamAV
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Default ClamAV databases do not have great detection levels, but it can be enhanced with free or paid signature databases.
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### List of known free databases | As of April 2022
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- [SecurityInfo](https://www.securiteinfo.com/) - free ClamAV DBs for testing purposes, required registration after which you can use them from 1 IP
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- [InterServer](http://rbluri.interserver.net/) - free to use ClamAV DBs, but they do not fit well for email scanning
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### Enable SecuriteInfo databases
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1. Sign up for a free account at https://www.securiteinfo.com/clients/customers/signup
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2. You will receive an email to activate your account and then a follow-up email with your login name
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3. Login and navigate to your customer account: https://www.securiteinfo.com/clients/customers/account
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4. Click on the Setup tab
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5. You will need to get `your_id` from one of the download links, they are individual for every user
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7. Add to `data/conf/clamav/freshclam.conf` with replaced `your_id` part:
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```
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfo.hdb
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfo.ign2
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/javascript.ndb
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/spam_marketing.ndb
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfohtml.hdb
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfoascii.hdb
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DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfopdf.hdb
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```
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8. For free SecuriteInfo databases, download speed is limited to 300 kB/s. In `data/conf/clamav/freshclam.conf`, increase the default `ReceiveTimeout 20` value to `ReceiveTimeout 90` (time in seconds), otherwise some of the database downloads could fail because of their size.
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9. Adjust `data/conf/clamav/clamd.conf` to align with next settings:
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```
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DetectPUA yes
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ExcludePUA PUA.Win.Packer
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ExcludePUA PUA.Win.Trojan.Packed
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ExcludePUA PUA.Win.Trojan.Molebox
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ExcludePUA PUA.Win.Packer.Upx
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ExcludePUA PUA.Doc.Packed
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MaxScanSize 150M
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MaxFileSize 100M
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MaxRecursion 40
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MaxEmbeddedPE 100M
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MaxHTMLNormalize 50M
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MaxScriptNormalize 50M
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MaxZipTypeRcg 50M
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```
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10. Restart ClamAV container:
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=== "docker compose (Plugin)"
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``` bash
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docker compose restart clamd-mailcow
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```
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=== "docker-compose (Standalone)"
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``` bash
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docker-compose restart clamd-mailcow
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```
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Please note:
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- You can't use `ExcludePUA` and `IncludePUA` in `clamd.conf` simultaneously, so please comment any `IncludePUA` if you uncommented them before.
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- List of databases provided in this example fit most use-cases, but SecuriteInfo also provides other databases. Please check SecuriteInfo FAQ for additional information.
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- With the current DB set (including default DBs) ClamAV will consume about 1.3Gb of RAM on your server.
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- If you modified `message_size_limit` in Postfix you need to adapt `MaxSize` settings in ClamAV as well.
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### Enable InterServer databases
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1. Add to `data/conf/clamav/freshclam.conf`:
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```
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DatabaseCustomURL http://sigs.interserver.net/interserver256.hdb
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DatabaseCustomURL http://sigs.interserver.net/interservertopline.db
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DatabaseCustomURL http://sigs.interserver.net/shell.ldb
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DatabaseCustomURL http://sigs.interserver.net/whitelist.fp
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```
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2. Restart ClamAV container:
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=== "docker compose (Plugin)"
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``` bash
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docker compose restart clamd-mailcow
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```
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=== "docker-compose (Standalone)"
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``` bash
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docker-compose restart clamd-mailcow
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```
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