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robardill
Beginner

Routing host with no gateway support?

Does Cisco IOS include a feature to proxy TCP/UDP connections?

I have a legacy device on the LAN that we need to reach remotely, but frustratingly it doesn't support adding a gateway IP.

Regards

Rob

8 REPLIES 8
paolo bevilacqua
Hall of Fame Master

Most likely the device supports IP gateway, but is not evident to you how.

You can also probably use NAT for that.

Is that device capable of adding static routes. That might help you.

Jawad

If that setting is there, it's not exposed in the settings.

pille1234
Participant

Most, if not all Cisco switches and routers support proxy arp. To make things worse, it us usually activated by default. From a networkers perspective this is a rather ugly feature, but it does what you are looking for.

Hi,

Just imagine Source A(192.168.1.1/30)  has a PCA(192.168.1.2/30) that want to reach remotely Source B (192.168.2.1/24) network  PCB(192.168.2.10/24)

On Source B

U will do one to one nat

ip nat inside source static 192.168.2.10 192.168.1.10

On Source-A

Assing a new Subnet to Legacy Device.  192.168.1.1 255.255.255.252

One IP for Legacy Device and One For Router Interface 192.168.1.2 255.255.255.252

ip route 192.168.1.10 255.255.255.255 (next Hop)

ip route 192.168.2.0 255.245.255.255 (next Hop)

On Remote Device

On Router

ip nat inside source static 192.168.2.10 192.168.1.10

That will work.

Jawad

The remote host is on the internet. It's not locally routed.

But you've given me a few ideas to explore, thanks.

The remote host isn't adjancent, so proxy arp isn't an option.

Remote PC <-----> Internet <----> Router <----> Device.

Do the way that i told u it will work 100%

Jawad