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TMG spoofed packet dropp

hi,

our TMG has two network cards: for External network - 193.219.57.20, internal - 10.0.30.49.

I can't access internal web server (10.0.30.50) through TMG server. I get errorr SPOOFING_PACKET_DROPPED (Status:A packet was dropped because Forefront TMG determined that the source IP address is spoofed).

As I read  "The only reasons packets are denied as spoof are that either the ISA Server does not have the source IP in its address range for that network or if ISA does not have a route to it."

Our route table is:

===========================================================================
Active Routes:
Network Destination        Netmask         Gateway       Interface Metric
          0.0.0.0         0.0.0.0  193.219.57.16   193.219.57.20   266
         10.0.0.0   255.255.255.0        10.0.30.1      10.0.30.49    138
        10.0.30.0   255.255.255.0         On-link        10.0.30.49   266
       10.0.30.49  255.255.255.255        On-link        10.0.30.49   266
      10.0.30.255  255.255.255.255        On-link       10.0.30.49    266
        127.0.0.0       255.0.0.0         On-link        127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link        127.0.0.1    306
  127.255.255.255  255.255.255.255        On-link         127.0.0.1   306
     192.168.12.0    255.255.254.0        10.0.30.1      10.0.30.49    138
   193.219.57.12  255.255.255.128        On-link    193.219.57.20   266
   193.219.57.20  255.255.255.255        On-link    193.219.57.20   266
   193.219.57.255  255.255.255.255        On-link   193.219.57.20    266
        224.0.0.0       240.0.0.0         On-link        127.0.0.1    306
        224.0.0.0       240.0.0.0         On-link   193.219.57.20    266
        224.0.0.0       240.0.0.0         On-link       10.0.30.49    266
  255.255.255.255  255.255.255.255        On-link         127.0.0.1   306
  255.255.255.255  255.255.255.255        On-link   193.219.57.20    266
  255.255.255.255  255.255.255.255        On-link        10.0.30.49   266
===========================================================================

 how can I check if ISA Server does not have the source IP in its address range ?

how to solve this?

thanks
aurimas



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