Re: DMZ ADRESSING

  • From: Мостовой Максим <maxim@xxxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Mon, 28 Jan 2002 14:21:58 +0300

Hello !
Im still have a problem in routing on ISA server
My DMZ NIC does not have gateway.
IP routing enabled. 
in IP packet filters Allow rule Any protocol Both direction on DMZ subnet.
And i can ping only DMZ isa interface from DMZ computer =(((((((.
In logs of ISA I do not see any responses on PING to external computers.

If i stopped Microsoft Firewall in services - all works fine !
Hm its strange .
  ----- Original Message ----- 
  From: Jim Harrison 
  To: [ISAserver.org Discussion List] 
  Sent: Friday, January 25, 2002 9:26 PM
  Subject: [isalist] Re: DMZ ADRESSING


  http://www.ISAserver.org


  You should read up on IP subnetting 
http://support.microsoft.com/support/kb/articles/Q164/0/15.asp.
  Also take a look at Tom's article on DMZ 
http://www.isaserver.org/shinder/tutorials/dmz_scenarios.htm
  Your DMZ NIC should not have a default gateway.
   
  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/authors/harrison/
  Read the books!

    ----- Original Message ----- 
    From: Мостовой Максим 
    To: [ISAserver.org Discussion List] 
    Sent: Friday, January 25, 2002 01:45
    Subject: [isalist] DMZ ADRESSING


    http://www.ISAserver.org


    I make new configuration IP adressing (as wroute Jim Harrison) but DMZ 
still not work.

    WAN NIC A.B.C.7 
    MASK   255.255.255.224
    GW A.B.C.1

    DMZ NIC A.B.C.9
    MASK     255.255.255.248
    GW  A.B.C.1

    DMZ COMPUTER  A.B.C.10
    MASK 255.255.255.248
    GW A.B.C.9

        SCHEME
        |CISCO ROUTER |
                |
                |
                |
        |ISA WAN NIC|
         |    ISA           |
         | COMPUTER |
         |                    |
        INT NIC        DMZ NIC
         |                    |
        HUB            HUB
         |                    |
        INTERNAL     DMZ Zone
        net

     
     In cisco router iam added :
    ip route A.B.C.8 255.255.255.248 A.B.C.7
    (DMZ subnet throught WAN ISA NIC)
    In ISA i added Packet filter ANY BOTH This computers on perimetr network 
A.B.C.8 Mask 255.255.255.248
    Packet filtering and routing enabling.
    In route table in ISA i am added route -p add A.B.C.8 255.255.248 A.B.C.9 
    (for dmz subnet on this interface)
     
    And i can ping only DMZ isa interface from DMZ computer =(((((((.
    In isa logs i see (trying to ping ISA WAN interface from DMZ computer):
    2002-01-25 09:36:05 195.34.45.10 195.34.45.7 ICMP 8 0 ALLOWED 195.34.45.9
    2002-01-25 09:36:09 195.34.45.10 195.34.45.7 ICMP 8 0 ALLOWED 195.34.45.9
    2002-01-25 09:36:14 195.34.45.10 195.34.45.7 ICMP 8 0 ALLOWED 195.34.45.9
    2002-01-25 09:36:17 195.34.45.10 195.34.45.7 ICMP 8 0 ALLOWED 195.34.45.9
    there is no response from WAN interface as you can see.
     
    here normal ping log - from DMZ computer to DMZ interface of ISA
    2002-01-25 09:35:57 195.34.45.10 195.34.45.9 ICMP 8 0 ALLOWED 195.34.45.9
    2002-01-25 09:35:57 195.34.45.9 195.34.45.10 ICMP 0 0 ALLOWED 195.34.45.9
     
    HAVE SOMEBODY IDEAS ? PLZ HELP !
     
    ------------------------------------------------------
    You are currently subscribed to this ISAserver.org Discussion List as: 
jim@xxxxxxxxxxxx
    To unsubscribe send a blank email to $subst('Email.Unsub') 
  ------------------------------------------------------
  You are currently subscribed to this ISAserver.org Discussion List as: 
maxim@xxxxxxxxxxxx
  To unsubscribe send a blank email to $subst('Email.Unsub') 

Other related posts: