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Thanks for the confirmation. I'm familiar with all the services you mentioned. We are using zen on our MTA. What we're trying to do is shift some of the 'defense' load to the ASA. Our MTA understands both DNSBLs and spamassassin. The way we use some other features of the MTA, it I know we're letting some zen-listed IPs through (its just the way this system works). I'd like to have the system prioritize DNSBL decisions, but that's unfortunately not the case. Thanks again.
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Thanks for the confirmation. I'm familiar with all the services you mentioned. We are using zen on our MTA. What we're trying to do is shift some of the 'defense' load to the ASA. Our MTA understands both DNSBLs and spamassassin. The way we use some other features of the MTA, it I know we're letting some zen-listed IPs through (its just the way this system works). I'd like to have the system prioritize DNSBL decisions, but that's unfortunately not the case. Thanks again.

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Is there a way to configure an ASA5505 to use a DNSBL such as Spamhaus to deny inbound access? I'm familiar with the DROP list at Spamhaus, I'm more interested in the lists like zen.spamhaus.org.
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Is there a way to configure an ASA5505 to use a DNSBL such as Spamhaus to deny inbound access? I'm familiar with the DROP list at Spamhaus, I'm more interested in the lists like zen.spamhaus.org.

ASA5505 and DNSBL

Anti-virus software was originally developed to detect and remove computer viruses. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In particular, modern antivirus software can protect from malicious browser helper objects (BHOs), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious layered service providers (LSPs), dialers, fraud tools, adware and spyware. Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity theft (privacy), online banking attacks, social engineering techniques, Advanced Persistent Threat (APT), botnets and DDoS attacks.

Anti-Virus Apps

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.