Usually, you want a firewall to block everything but established communication, and this can be difficult to impossible with ACLs, depending on the router or switch vendor and software version. Some devices (router or switch) support reflexive ACLs that can be stateful, but they are more limited, and it becomes a large burden to to maintain.

Aug 02, 2017 Connecting Core switch to firewall - Cisco Community Mar 30, 2011 Amazon.com: Switch

May 19, 2010 · Because having a switch with a firewall would be pretty expensive (you'd need a layer-4 aware switch, at least) If you really just want a router with a gigabit switch, that'd be much easier/cheaper. cntp is offline

How to Detect Common Router, Switch and Firewall To avoid hacks, it is a good idea to try and find any router, switch, and firewall weaknesses. Some high-level security vulnerabilities commonly found on network devices can create many problems. Once you know about them, you can take measures shore them up. Unsecured interfaces You want to ensure that HTTP and telnet interfaces to […]

[SOLVED] Firewall & Router Directly Connected to Switch

Network Trio: Firewall vs Switch vs Router | Field Engineer Jun 25, 2019 VPN Firewalls Series | Security | Business | NETGEAR