Updating server to use IPv6

GoWilkes

• November 17, 2023 15:18

After I began using Cloudflare, I've had problem after problem. It looks like a lot of it hails back to the issue that my server reads IPs in IPv4, but the only way that I can identify users through Cloudflare is to use mod_remoteip to make the system read CF_CONNECTING_IP instead of REMOTE_ADDR. Which is all fine and dandy, except that CF_CONNECTING_IP is (almost always) sending IPv6. I have over 100 IPv4 IPs and ranges whitelisted in cPHulk and CSF, and I have no idea how I could even begin to change them to IPv6. Any suggestions on how to manage this process?

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  ffeingol

  • November 17, 2023 20:41

  A little confused by your post. Is your server configured to accept IPV6? Are you trying to whitelist CloudFlare IP's?

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  GoWilkes

  • November 17, 2023 21:21

  Is your server configured to accept IPV6? I have no idea. How do I know? Are you trying to whitelist CloudFlare IP's? No, that was the easy part! LOL The problem I'm having is that, while using Cloudflare, REMOTE_ADDR always comes in with a Cloudflare IP instead of the user's IP. I've discovered that I can use mod_remoteip to make the server use XFF or CF_CONNECTING_IP instead of REMOTE_ADDR, but these come in as IPv6 instead of IPv4. So the questions are: 1. how do I modify the server to accept IPv6; and 2. convert the IPv4 addresses that are already whitelisted / blacklisted in cPHulk and CSF to the new IPv6?

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