Chapter 15 Security Profiles : AntiVirus : Antivirus concepts : Archive scan depth : Configuring archive scan depth
  
Configuring archive scan depth
For example, this CLI command sets the archive scan depth for SMTP traffic to 5. That is, archives within archives will be scanned five levels deep.
config firewall profile-protocol-options
edit “default”
config http
set uncompressed-nest-limit 5
end
You can set the nesting limit from 2 to 100.