You decide to use the PING command to test that routing is configured correctly.The device you ping is 4 hops (routers/networks) away. For the sake of simplicity we will assume that everything else is working perfectly and it should reply.
At this point Router A can’t find a match for the destination subnet, it only has routes to the two subnets it is attached to so, it fail. If we configure Router A’s own default gateway to be IP 192.168.1.1 (Router B) it adds the 0.0.0.0 entry into it’s routing table with a gateway IP of 192.168.1.1.
As explained in part 2 this will forward everything to this IP it can’t find a specific match for in it’s own routing table.
The problem however, was not that the packets couldn’t get to the destination, it was that they couldn’t come back.
It could be as simple as a misconfigured default gateway on the destination PC; packets would arrive there but when replying the PC would send them to a wrongly configured gateway and consequently fail.
The topic on selecting a secure router is complete, as is the Security Checklist page, which lists the security features to look for when buying a router. The first step towards a secure router is choosing a router. For a list of router security features see my Security Checklist.
The router bugs page will never be complete, but that's not the point. Many people use the device given them by their Internet Service Provider (ISP) which I think is a bad idea for a number of reasons. My only relationship with Peplink is that of a customer. The most expert person in the world can only make a router as secure as the included features allow.After some huge flaws, affecting millions of routers, caught my attention, I started following the topic more closely.As a Defensive Computing guy, I eventually realized that I needed to upgrade my own router security and get more up to speed on the topic.With a TP-LINK Archer C8, go to the Advanced tab, click on System Tools, then on Backup and Restore, then the Backup button.Welcome to the final part in a 3 part series of articles about routers and routing .It exists to backup my argument - don't buy a consumer router. I spoke again about Router Security, at the O'Reilly Security Conference on Nov. The next decision is buying a consumer router or a business class device. I am not alone in pointing out the sad state of router software/firmware. Finally, some thoughts on Apple routers and Google Wifi and On Hub routers and mesh routers.