TMG with multiple IP addresses yet another problem

Hello,

I use TMG 2010 on Windows 2008 R2 Standard.

On TMG I have three NIC:

  • NIC1 - intranet 192.168.1.19
  • NIC2 - ISP1 (178.xxx.xxx.66)
  • NIC3 - ISP2 (91.xxx.xxx.2, 91.xxx.xxx.3) - yes, multiple IP on the same subnet

TMG running in ISP redundancy mode (load balancing).

A problem: I can't ping the secondary NIC3 IP (91.xxx.xxx.3) from outside. I can ping 178.xxx.xxx.66, i can ping 91.xxx.xxx.2 without any problem, but I can not ping the 91.xxx.xxx.3...

Okay. I start some experiments. I connect another computer with 91.xxx.xxx.5 in the ISP2 provider switch and can ping from 91.xxx.xxx.5 to 91.xxx.xxx.3 and vice versa without any troubles.

Next step. I install Network Monitor on TMG and can see the interesting thing: the reply packet from 91.xxx.xxx.3 is sending throw the NIC2 interface.

I check the Weak Host Send on all interfaces - it is turned off. I decrease NIC2 metric - the result is the same...

Can anybody give me some ideas how to fix this?..



  • Edited by keyser1971 Tuesday, September 08, 2015 8:25 PM
September 8th, 2015 8:20pm

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