Manual

Appendix 1: Configuration details 36
Expressway-C configuration details 36
Expressway-E configuration details 37
Expressway-C and Expressway-E configuration details 38
Appendix 2: DNS records 40
DNS configuration on host server 40
Host DNS A record 40
DNS SRV records 40
DNS configuration (internal DNS server) 40
Local DNS A record 41
Local DNS SRV records 41
Appendix 3: Firewall and NAT settings 42
Internal firewall configuration 42
Outbound (Internal network > DMZ) 42
Inbound (DMZ > Internal network) 43
External firewall configuration requirement 43
Inbound (Internet > DMZ) 43
Outbound (DMZ > Internet) 44
Appendix 4: Advanced network deployments 46
Prerequisites 46
Background 46
Solution 48
Routers/firewalls with SIP/H.323 ALG 50
General guidelines and design principles 51
Non-overlapping subnets 51
Clustering 51
External LAN interface setting 51
Dual network interfaces 51
Example deployments 53
Single subnet DMZ using single Expressway-E LAN interface 53
3-port firewall DMZ using single Expressway-E LAN interface 54
Technical support 55
Document revision history 56
Cisco Expressway Basic Configuration Deployment Guide (X8.5.2) Page 3 of 57