Building a linux multi port router
I am considering building a multi port router using Linux and would like some advice regarding how I could best achieve this. What I essential want to do is to provide a means of routing traffic between 4 existing networks in a building to provide a common point of Internet access. The networks should(but not essential) remain separate from each other as in not routing between them but be able to access the internet via a single network adapter in the Linux box. The networks are currently as follows:
I would install 5 network adapter in a PC, one for each network and one as a WAN port. Is this a workable solution?
Any other advice would be appreciated.