I am looking at setting up a redundant broadband connection and I need some help in my thought processes. We are trying to do this with very minimal expenditure. Here is my configuration idea and I would like to know if anyone sees a problem with this.
Incoming Connections - T1 and Cable
Existing Config already uses a block of switch ports to allow dual firewalls to run on the backside of the switch accessing the single T1. The existing primary firewall is already configured with an address from our block of internet addresses. It is set to allow traffic from the existing T1 router. I would like to add the cable connection to this scheme. To do so I would attach the cable modem to a nat router to get the cable ip changed over one of our available existing internet IP addresses. This would create a dual route out of the switch to the internet. Would this create a routing loop or would it allow me to access both connections and just have them as a shared connection? I can set the firewall to allow communications from the secondary IP address I believe.
When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
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