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07-11-2013 07:15 AM - edited 07-11-2013 09:02 AM
07-11-2013 07:15 AM - edited 07-11-2013 09:02 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
Solved! Go to Solution.
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07-11-2013 06:56 PM
07-11-2013 06:56 PM
Re: DMZ with 12500 and ASA
Why don't you get rid of the IP address from the A12500 DMZ VLAN interface.
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07-12-2013 03:55 AM
07-12-2013 03:55 AM
Re: DMZ with 12500 and ASA
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
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07-12-2013 06:36 PM
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07-15-2013 02:01 AM
07-15-2013 02:01 AM
Re: DMZ with 12500 and ASA
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