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Author Topic: 8006 dhcp-relay not work between zone of firewall  (Read 2737 times)

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Offline radeon9100

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8006 dhcp-relay not work between zone of firewall
« on: May 27, 2013, 10:48:03 AM »
Hi,
   
   I had problem with window DHCP server that place on another zone of firewall such as DMZ and all client place at trust zone of firewall can't get IP from DHCP server.
   - on firewall not had any policy I test with any any policy between zone condition
   - Issue not occur with linux/unix dhcp server It's work on diference zone
   - If I move window DHCP server to same zone of client all VLAN client can get IP from DHCP
   If someone had experience with same situation please suggest solution to me.     
 
# box type             : ERS-8006
# software version     : 7.1.3.10
Regards,
Radeon9100  :'(


Offline Flintstone

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Re: 8006 dhcp-relay not work between zone of firewall
« Reply #1 on: May 27, 2013, 03:54:07 PM »
Hi radeon9100,

Make sure you have an IP helper address configured on the firewall?

Use a Sniffer to see what the DHCP discover packet looks like at the Windows DHCP server if it gets that far?

CheerZ and good luck

Offline radeon9100

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Re: 8006 dhcp-relay not work between zone of firewall
« Reply #2 on: May 27, 2013, 10:25:53 PM »
Hi radeon9100,

Make sure you have an IP helper address configured on the firewall?

Use a Sniffer to see what the DHCP discover packet looks like at the Windows DHCP server if it gets that far?

CheerZ and good luck

Hi Flinstone
      It's second time to me about dhcp-relay issue both of time I had replace existing switch with ers8000 my confuse is why existing network can operate between zone but ers8000 is not T T

Br,
Radeon9100

Offline Michael McNamara

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    • michaelfmcnamara
    • Michael McNamara
Re: 8006 dhcp-relay not work between zone of firewall
« Reply #3 on: May 28, 2013, 02:02:48 PM »
You haven't described the environment well enough for me to respond in detail.

In short you need a DHCP relay (IP helper) to take the DHCP broadcast packet and forward it to a DHCP server. You then obviously need the firewall to pass the packets to the DHCP server and allow the replies to be passed back from the DHCP server.

Good Luck!
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