mailcow-dockerized-docs/docs/manual-guides/ClamAV/u_e-clamav-additional_dbs.en.md

Additional Databases for ClamAV

Default ClamAV databases do not have great detection levels, but it can be enhanced with free or paid signature databases.

List of known free databases | As of April 2022

• SecurityInfo - free ClamAV DBs for testing purposes, required registration after which you can use them from 1 IP
• InterServer - free to use ClamAV DBs, but they do not fit well for email scanning

Enable SecuriteInfo databases

1. Sign up for a free account at https://www.securiteinfo.com/clients/customers/signup
2. You will receive an email to activate your account and then a follow-up email with your login name
3. Login and navigate to your customer account: https://www.securiteinfo.com/clients/customers/account
4. Click on the Setup tab
5. You will need to get your_id from one of the download links, they are individual for every user
6. Add to data/conf/clamav/freshclam.conf with replaced your_id part:

DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfo.hdb
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfo.ign2
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/javascript.ndb
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/spam_marketing.ndb
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfohtml.hdb
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfoascii.hdb
DatabaseCustomURL https://www.securiteinfo.com/get/signatures/your_id/securiteinfopdf.hdb

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.

9. Adjust data/conf/clamav/clamd.conf to align with next settings:

DetectPUA yes
ExcludePUA PUA.Win.Packer
ExcludePUA PUA.Win.Trojan.Packed
ExcludePUA PUA.Win.Trojan.Molebox
ExcludePUA PUA.Win.Packer.Upx
ExcludePUA PUA.Doc.Packed
MaxScanSize 150M
MaxFileSize 100M
MaxRecursion 40
MaxEmbeddedPE 100M
MaxHTMLNormalize 50M
MaxScriptNormalize 50M
MaxZipTypeRcg 50M

10. Restart ClamAV container: === "docker compose (Plugin)"

    docker compose restart clamd-mailcow
    

=== "docker-compose (Standalone)"

``` bash
docker-compose restart clamd-mailcow
```

Please note:

• You can't use ExcludePUA and IncludePUA in clamd.conf simultaneously, so please comment any IncludePUA if you uncommented them before.
• List of databases provided in this example fit most use-cases, but SecuriteInfo also provides other databases. Please check SecuriteInfo FAQ for additional information.
• With the current DB set (including default DBs) ClamAV will consume about 1.3Gb of RAM on your server.
• If you modified message_size_limit in Postfix you need to adapt MaxSize settings in ClamAV as well.

Enable InterServer databases

1. Add to data/conf/clamav/freshclam.conf:

DatabaseCustomURL http://sigs.interserver.net/interserver256.hdb
DatabaseCustomURL http://sigs.interserver.net/interservertopline.db
DatabaseCustomURL http://sigs.interserver.net/shell.ldb
DatabaseCustomURL http://sigs.interserver.net/whitelist.fp

2. Restart ClamAV container: === "docker compose (Plugin)"

   docker compose restart clamd-mailcow
   

=== "docker-compose (Standalone)"

``` bash
docker-compose restart clamd-mailcow
```