# Communication

Verify that you do the following tasks:

• Allow the following ports on the firewall server:

– Ports 9333 to 9339 for TCP and UDP for SME cluster communication

– Ports 8800 and 8900 for Cisco KMC communication

– Ports HTTP (80) and HTTPS (443) for SME web-client communication

• Use either DNS or IP address (not a mix) for the SAN and KMC communication

Note If you are using IP addresses, refer to the “sme.useIP for IP Address or Name Selection” to learn about sme.useIP.