help -- multi LAN connection

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help -- multi LAN connection

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Hi,

I'm fairly new to ClearOS, can take some expert advice to correctly setup a ClearOS.

I have 3 networks:
1) 10.0.0.x/24 (has internet access, using other router as gateway 10.0.0.100, DHCP, DNS 10.0.0.24)
2) 172.20.x.x/22 (will be use ClearOS as gateway, DHCP and DNS)
3) 172.30.x.x/20 (will be use ClearOS as gateway, DHCP and DNS)

If all 3 network can access to each other would be ideal but since I don't have access to network 1 router, that maybe not possible. I do need to have network 2 and 3 can access to each other and network 1.

Question:
Should I have network 1 connect as one of the LAN in ClearOS or should I use multi-wan and have network 1 be one of the WAN?

Thanks,
Bruce

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Thursday, July 06 2017, 07:42 AM

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Bruce Shiu

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Tuesday, July 18 2017, 06:43 PM - #Permalink
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Thanks, let me set that up and give it a test.
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Nick Howitt

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Thursday, July 06 2017, 11:45 AM - #Permalink
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If network 2 and 3 need to access network1 but 1 does not need to access 2 or three, then it is probably best to use MultiWAN. You may need to force the routing to 10.0.0.x/24 over one WAN link only.

If you configure all three interfaces as LAN then 2 and 3 will know where 1 is, but 1 won't know where to send the replies to. For that to work, static routes need to be set up on router 1 (which you don't have access to) or individually to the devices on LAN 1.
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