Cisco Expressway-E and Expressway-C Basic Configuration Deployment Guide (X14.0) - Firewall and NAT Settings

Publisher

Cisco

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-0/basic_config/exwy_b_cisco-expressway-e-and-expressway-c-basic-configuration-deployment-guide-x14-0/exwy_m_firewall-and-nat-settings.html

Published

2021-04-14

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco documentation terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• Traversal communications are initiated from Expressway-C to Expressway-E, so no ports need opening from the DMZ to the internal network for call handling. in context
• Any SIP or H.323 fixup/ALG function on the NAT firewall in front of the Expressway-E should be disabled because it interferes with Expressway operation. in context

Cite this source record

APA

WarmTransfer. (2021, April 14). Cisco Expressway-E and Expressway-C Basic Configuration Deployment Guide (X14.0) - Firewall and NAT Settings. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-exwy-basic-x140-firewall-nat

BibTeX

@misc{warmtransfer-cisco-exwy-basic-x140-firewall-nat,
  title  = {Cisco Expressway-E and Expressway-C Basic Configuration Deployment Guide (X14.0) - Firewall and NAT Settings},
  author = {{WarmTransfer}},
  year   = {2021},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-exwy-basic-x140-firewall-nat},
  note   = {Cisco, accessed 2026-09-25}
}