Posts Tagged ‘Juniper Firewall’

Dis-jointed Network.

Monday, March 7th, 2011

I ran into this while trying to fix a wireless connection at a Clients house last week. Here is the setup:
Juniper Firewall acting as router from internet via Static IP from Qwest.
Juniper Firewall is also a DHCP server for the internal network. It is handing out 192.168.1.X/24 with a gateway address of
UsRobotics G-max wireless router and firewall connected to the Juniper Firewall.
This device is getting Wan IP address from the Juniper Firewall via DHCP This device is also configured to hand out DHCP of 192.168.1.X/24 with a gateway address of
This was causing a disjointed network error. The wireless would connect but it was limited access. If you plugged a Cat5 cable into the Gmax router you would get the same error.
After doing some research I found that this should have never worked.
I left the IP address and DHCP on the Juniper firewall alone. I changed the IP address on the Gmax Router to hand out DHCP of 10.0.0.X/24. This gives the wireless computers IP addresses of 10.0.0.x/24 with a gateway of The Gmax now gets a DHCP address from the Juniper firewall on the 192.168.1.X network with a gateway of

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