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MS switches get IP traffic control

Support for IPv4 Access Control Lists improves security and network oversight.

When we introduced Layer 3 Essentials for the Meraki MS320 and MS420 switches, we promised to continue development of features that enhance manageability and security for our customers—and today, we’re here to deliver.

Our latest MS switch update will provide IPv4 Access Control List (ACL) capabilities on all of our MS switches—that means layer 2 and layer 3 families. IP traffic between hosts on separate VLANs, traffic from LAN clients to the Internet, and traffic between LAN clients can now be filtered and controlled from within the switch itself, without needing a separate firewall. For example, at the switch level you can now:

  • Prevent hosts on one network subnet from communicating with hosts on another subnet

  • Restrict clients on a guest VLAN from accessing any internal resources

  • Disallow Web access for specific hosts

  • Ensure internal servers only reply to requests using authorized protocols and ports

  • Block undesired protocols (e.g. ICMP) and services to reduce unnecessary network overhead

The interface for switch ACLs will be familiar to our MR access point or MX security appliance customers: simply navigate to Configure > IPv4 ACLs and begin filtering based on criteria such as protocol, source and destination IP address, and port number. Note: you can filter by IP subnet (e.g. and give port ranges (e.g. 80-88) in these dashboard fields.

Screen Shot 2014-06-24 at 11.17.53 AM

ACLs are a critical tool for enforcing security, and give customers using the Meraki MS greater control over traffic at the switch level. We’ll be announcing additional features coming to a switch near you in the upcoming days—so stay tuned!

For more information about Meraki MS switches, please visit our website or contact us directly.