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  • 1.  DMZ with 12500 and ASA

    Posted Jul 11, 2013 10:15 AM

    Hello

     

    I am trying to bring a DMZ online, however I am having a small problem and I belive the problem with assymetric routing. I know this isn't a Cisco ASA forum, however I'm hoping someone can spot the obvious issue that I belive is down to my routing on the 12500. (I've changed some details but that won't matter)

     

    On the 12500 I've setup the VLAN with this IP address

     

    interface VLAN 244

    10.10.244.4

     

    On the ASA I have setup the DMZ interface to have this

    10.10.244.1

     

    All computers in the DMZ are attached to the core switch, however their gateway is the firewall. The 12500 does NOT advertise the 244 VLAN via OSPF but the firewall does so here is the routing table on the 12500 (10.1.1.2 is the ASA)

     

    <12500>dis ip routing-table 10.10.244.0
    Routing Table : Public
    Summary Count : 2

    Destination/Mask Proto Pre Cost NextHop Interface

    0.0.0.0/0 Static 60 0 10.1.1.2 Vlan1000
    10.10.244.0/22 Direct 0 0 10.10.244.4 Vlan244

     

    The ASA

     

    ASA# sh route DMZ244

    C 10.10.244.0 255.255.252.0 is directly connected, DMZ244

     

    However I see this alert on the ASA which tells me the routing is not correct, however I don't know how to fix the issue. Does anyone else have experiance with trying to setup a DMZ this way using H3C switches? 

     

    Deny TCP (no connection) from 10.10.244.53/3389 to 10.5.21.92/53519 flags SYN ACK  on interface DMZ244

     

    Any help appreciated

     

    Thanks

     

     



  • 2.  RE: DMZ with 12500 and ASA

    Posted Jul 11, 2013 09:56 PM

    Why don't you get rid of the IP address from the A12500 DMZ VLAN interface.



  • 3.  RE: DMZ with 12500 and ASA

    Posted Jul 12, 2013 06:56 AM

    Because then I can't even ping 10.10.244.1 (the ASA) from the 12500, even if I try (10.10.240.1 is inside network gateway also on the 12500)

     

    ping -1 10.10.240.1 10.10.244.1

     



  • 4.  RE: DMZ with 12500 and ASA

    Posted Jul 12, 2013 09:37 PM

    That's normal - the question would be - with that address gone from the 12500, can your devices in the DMZ subnet connect to the ASA, or through it as per whatever rules you have configured?



  • 5.  RE: DMZ with 12500 and ASA

    Posted Jul 15, 2013 05:01 AM

    Ah, excellant, that worked. Small rule in the firewall needed but that was it. I was simply replicating what I had on my Cisco enviroment, this way didn't work with the H3C system it appears. Thanks for the help, that was an easy fix 



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