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Introduction to a Self Managed Life: a 13 hour & 28 minute presentation by FUTO software
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==== 3.3: DHCP Setup ==== # '''DHCP (Dynamic Host Configuration Protocol)''' automatically assigns IP addresses to devices on your network. This makes it easier to connect new devices without manually configuring IP settings on each one. This is what allows clients to be able to get an IP address automatically as soon as they connect via Wi-Fi or with an ethernet cord into your switch. You want this so that by default people can go online without having to specify their IP manually. # When asked if you want to configure DHCP, choose '''Yes'''. # Set the DHCP range. This is the range of IP addresses that will be assigned to devices on your network. For example: #* '''Start Address:''' <code>192.168.5.2</code> #* '''End Address:''' <code>192.168.5.254</code> # Since we have our router on <code>192.168.5.1</code>, the next address that’s available is <code>192.168.5.2</code> which is the start, and <code>192.168.5.254</code> as the end. # For ''Do you want to revert to HTTP as the webconfigurator protocol'', choose <code>n</code>. No need to use HTTP instead of HTTPS. We’re never going to connect to this without a VPN anyway, so HTTP vs HTTPS isn’t the biggest security deal in the world, but it’s a good practice to use HTTPS whenever possible. This allows up to 254 devices on your local network, which is more than enough for most home setups. If you have more than 254 devices at home, you’re likely not reading a beginner’s guide from a board repair person cosplaying as a sysadmin. If you want to go crazy, you can do a different setup entirely: change the LAN IP to something even less common if you want to avoid conflicts, such as <code>172.16.10.1</code> as a LAN IP, subnet 24. This would allow 254 devices that would be given IPs such as <code>172.16.10.2</code>, <code>172.16.10.30</code>, etc.—and your '''pfSense''' router web interface would be accessible on <code>172.16.10.1</code>. When you connect to other people’s networks, if you don’t disable LAN access in the OpenVPN android client, and their network has a <code>192.168.1.1</code>, and yours has a <code>192.168.1.1</code>… You see where this is going. Chances are they don’t have a <code>192.168.5.1</code> though. <blockquote>'''NOTE:''' If both your home network and a remote network you’re connecting from via VPN use the same IP range, you can end up with routing & connectivity issues. Let’s say you’re at a coffee shop. You connect via wifi. On their network, you are 192.168.1.3. You connect to your home network via your VPN, and you want to connect to your local mailserver… but you both have the same pos linksys wrt54g router, which defaults everyone to 192.168.1.*. so you try to connect to 192.168.1.3. Do you see where this is going? Changing your home network to a less common IP range can mitigate this risk. Always check the IP range of networks you frequently connect to and adjust your home network accordingly. Or, just make yours some weird-ass number that nobody else will be using. The latter works for me. </blockquote> <span id="finishing-up"></span>
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