Hello! My background in OpenWRT and networking in general is slim to none. Here are my goals, which I am hoping OpenWRT can help with:
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I want to use my Linksys WRT3200acm behind an AT&T Fiber gateway (Arris). I don't really want to, but I don't have the option of removing it. I want to interact with and need the Arris as little as possible and use the OpenWRT Linksys moving forward.
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I want to utilize a DDNS service for a custom domain I own. It's with noip.com.
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I want to be able to type in my domain name from within my own LAN and have it connect to my home web server. (e.g. minecraft.cooldomain.tld would map to a private IP when connected to the LAN, but otherwise resolve to the public IP address if outside of the LAN) I do not care how this is done, so long as I can do it. Loopback/hairpin/A record/magic, whatever.
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I want to have opkg working. Thus far, I can connect to the internet just fine (hello, world), but the ping function in LuCI isn't working, and neither is the opkg function (returns code 7 and thinks I can't connect).
Currently, I have an ethernet cable going from the Arris LAN port to the OpenWRT Linksys LAN port. I keep reading that it should be WAN, but for whatever reason, that breaks my internet connection. I think it may have something to do with AT&T's IP Passthrough function. There is no bridge possibility.
Thanks for tolerating a long post from a newbie. I need all the help I can get! I am comfortable with LuCI and CLI via SSH, though if it's gonna be commands, I would love a line-by-line for what to enter into the interface, as I have zero experience with opkg or OpenWRT in general.
Really appreciate any help!