How do ASA firewalls and UTM perimeter firewalls differ?
An ASA is a layer 3 and layer 4 firewall. UTM stands for Unified Threat Management, meaning it does the basic layer 3 and layer 4 firewalling but also has the capacity (much larger storage, more RAM, and faster CPU(s)) and capability (with licensing, usually) to go beyond, and filter up to layer 7 (in some cases). UTM appliances are usually for when you want a firewall but also the ability to filter spam, geo-filter (because normal firewalls can't usually handle the number of ACL entries required to do true geo-filtering), web filtering (blocking sites by category), etc. You can hack things together to kinda do some of these on a traditional ASA but it would only semi-work. Usually if you have an ASA and want to do web filtering, for example, you'd have to either have an in-line proxy to filter before sending to the firewall, or have a transparent proxy (using WCCP or such) to send web traffic from the ASA to something like a Websense appliance or similar, have it respond accordingly, and then either let the user hit the website or show a blocked/denied page.
There's more to it but that's a basic breakdown.
The Cisco ASA series (Adaptive Security Appliance) is a family of firewalls that started out as layer 3/4 firewalls. Their functionality has evolved considerably since.
UTM (Unified Threat Management) is a cross-vendor, umbrella term for an "all-encompassing" security solution that includes IPS, IDS, content filtering, malware detection, and so on. Essentially, these provide high-layer firewall functions as well. There may be considerable differences in functionality, performance and scalability between vendors - including Cisco's ASA line.
There is significant differences between UTA firewalls and cisco ASA statefull firewall
UTM Unified Threat Management Appliance Explained
It needs to be connected to the main network and works in order to provide maximum security against all incoming viruses. However, whereas the firewall is mainly concerned with the flow of data packets, a UTM appliance has a more diverse range of control traffic in deeper aspect of packet Unified threat management (UTM) provides multiple security features and services in a single device or service on the network, protecting users from security threats in a simplified way. UTM includes functions such as anti-virus, anti-spam, content filtering, and web filtering. Mainly looks for virus and threats and malwares , intrusion prevention and intrusion detection process. (source: SecPoint)
Cisco ASA firewall
It's is statefull firewall where as traffic can control as per our business requirements. It provides much more security features to protect our network and will have feasible to create vlan , and layer3 interfàce and allowing and restricting traffic among zones .asa firewall operates on layer3, layer4 and layer7 layers of OSI model .i
We can enable configure routing , and create layer2 interfaces
We can allow and restrict traffic based on TCP and UDP ports
Firewall can even operates at layer7 by resticting traffic on application layer by web filter, url filtering,
The Cisco ASA is a security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities also