Creating a NAT with Cisco Router (827) and a sw phone
I have a 827 Cisco Router; It has 3 ports on the back; one for
Ethernet, one for console, and an ADSL port.
I have a PC with a software SIP phone.
My environment is a LAN which is connected to the internet.
I want to configure a NAT on this Router, so that the software SIP
have a local address (like, say, 10.0.0.12) and will be able to
to the outside world via the Router NAT (through the LAN).
It seems to me that I should connect the PC directly to the Cisco
through a HUB, and connect the HUB to the LAN.
Is it so ? What should I do ?
If you have LAN clients with private IPs accessing the Internet, then you already have NAT. Outbound should work fine by just plugging your sw phone into your existing network. If you want to be able to accept inbound calls, you need to do a SIP port redirect on inbound to your Private IP that corresponds to the sw phone IP.
I wouldn't use a hub as they are prone to Ethernet collisions.
If you want to use a separate subnet for your sw phone, then you have to create VLANS on your switch and do logical interfaces on your router for routing and NATing since you only have one port on your router.
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