Hi All,
I have 2 CAS/HT Servers configured viz Microsoft Load Balancer and 2 Mailbox Servers. I have configured 1:1 NAT on my Firewall pointing to NLB Virtual IP.
WAN IP: xx.xxx.xx.80
Exchange IP: xx.xxx.xx.81
There is no problem with incoming packets which works perfectly but, my outgoing email packets are going through firewall IP (xx.xxx.xx.80) and not exchange IPs (xx.xxx.xx.81). I can see this firewall IP in the email headers.
What is it that I need to correct on my cisco to make sure all packets are going through my Exchange IPs?. One method I think is to create an outside dynamic NAT rule with source IPs of my 2 CAS/HT Servers & NLB IP which will point destination to my
Exchange public IP but then I start thinking what is the point of having NLB configured? Also, will not the packets get distributedby firewall to select any host from the pool of 3 source IPs (2 CAS/HT & NLB)? Is there a method to fix incoming packets to one host only?
Appreciate your time for answering.