This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Need advice on subnetting

I have a /28 network assigned by an ISP. I split the network into two /29 sunets. This gives me a /29 network that faces the internet and a /29 network for my DMZ zone. Problem is with /29 network I only get 6 usable IP adresses in the DMZ zone (which I already use all of them) but leaves 4 unused IP addresses in the zone facing the internet.

Is there a better / more efficient way of implementing the firewall? Nothing comes to my mind.

Thank you

This thread was automatically locked due to age.

Parents

0 BarryG over 16 years ago

You could use a /30, and possibly even a /31 for your external interface.

Barry
Cancel
Vote Up 0 Vote Down

Cancel
0 swoc over 16 years ago in reply to BarryG

You could use a /30, and possibly even a /31 for your external interface.

Barry

but wouldn't that split the network into 4 subnets of /30 ?
Cancel
Vote Up 0 Vote Down

Cancel
0 BarryG over 16 years ago in reply to swoc

Not if your ISP can do the routing correctly.

I have a bunch of subnets set up from a class C, all different, with a /29 on the external (used to be a /30, but ISP wanted to add another IP for their failover).

Barry
Cancel
Vote Up 0 Vote Down

Cancel
0 swoc over 16 years ago in reply to BarryG

Not if your ISP can do the routing correctly.

I have a bunch of subnets set up from a class C, all different, with a /29 on the external (used to be a /30, but ISP wanted to add another IP for their failover).

Barry

Well, I'm using ARP Proxy feature of the ASL because I couldn't even get my ISP to subnet my /28 network. Can you be more specific on how you subneted your network? Is it even possible to subnet a /28 into 2 uneven subnets?
Cancel
Vote Up 0 Vote Down

Cancel
0 BarryG over 16 years ago in reply to swoc

You could do
1 /29 and 2 /30s,
or
1 /29 and 4 /31s

Barry
Cancel
Vote Up 0 Vote Down

Cancel

Reply

0 BarryG over 16 years ago in reply to swoc

You could do
1 /29 and 2 /30s,
or
1 /29 and 4 /31s

Barry
Cancel
Vote Up 0 Vote Down

Cancel

Children

No Data