I know the Ironport cluster is not like your traditional cluster where you have a VIP and redundant hardware to ensure seamless failover should a device fail. Im keen to hear then how others have achieved a Highly available state for incoming emails to 2 or more Ironport appliances with seamless redundancy.
We use a load balancer in front of our ESAs. Look in the user guide (the advanced one, I think), for "direct server return" load balancing.
Using a load balancer makes for practically instantaneous fail-over. Granted, thats not as big a deal for SMTP as it is for other protocols, but it does avoid unnecessary mail delays. It also allows new ESAs to be deployed without DNS shenanigans, since the MX record refers to the load balancer. That's very helpful when you're protecting several hundred domains like we are. Updating hundreds of MX records is a drag.
For all versions of the Email Security Appliance (ESA) and Security Management Appliance (SMA), some Secure Sockets Link (SSL) certificates issued from the QuoVadis root certificate authority (CA) trust chain before 2021-03-31 cannot b...
Automation and programmability for networking and security are increasingly important topics. Every release since ISE 1.2 has included new REST API capabilities to better automate and integrate ISE with the rest of your network, appli...
The latest iteration (v2.3.4) of the Cisco Secure Firewall Migration Tool adds public beta support for S2S VPN migrations from ASA:
Policy-based (crypto map) Pre-Shared key authentication type VPN configuration to Firepower Management Center
Cisco Defense Orchestrator (CDO) is a cloud-based, multi-device manager that manages security products like Adaptive Security Appliance (ASA), Firepower Threat Defense next-generation firewall, and Meraki devices, to name a few.
We make improvement...
This document presents the ISE data limiting best practices that can dramatically improve the system performance on ISE.
Your deployment may be impacted if the alarms tab on ISE shows High load average, high CPU or high memoy usage alarm...