Tomcat RemoteIPValve using Cloudflare IP CIDR ranges

TomcateRemoteIPValveForCloudFlare.txt

<!-- for more, see my Aug 15 2024 comment in my post at https://coldfusion.adobe.com/2019/04/get-cf-know-users-real-ip-address-behind-proxy-load-balancer-caching-solution-etc/#comment-48778 -->
<Valve className="org.apache.catalina.valves.RemoteIpValve" remoteIpHeader="CF-Connecting-IP" 
         trustedProxies="
          ^(173\.245\.(?:4[8-9]|5[0-9]|6[0-3])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(103\.21\.(?:2(?:4[4-7]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(103\.22\.(?:2(?:0[0-3]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(103\.31\.(?:[4-7])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(141\.101\.(?:6[4-9]|[7-9][0-9]|1(?:[0-1][0-9]|2[0-7]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(108\.162\.(?:1(?:9[2-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(190\.93\.(?:2(?:4[0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(188\.114\.(?:9[6-9]|1(?:0[0-9]|1[0-1]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(197\.234\.(?:2(?:4[0-3]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(198\.41\.(?:1(?:2[8-9]|[3-9][0-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(162\.(?:1(?:5[8-9]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(104\.(?:1[6-9]|2[0-3])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(104\.(?:2[4-7])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(172\.(?:6[4-9]|7[0-1])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5]))\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|^(131\.0\.(?:7[2-5])\.(?:[0-9]|[1-9][0-9]|1(?:[0-9][0-9])|2(?:[0-4][0-9]|5[0-5])))$|2400:[Cc][Bb]00((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2606:4700((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2803:[Ff]800((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2405:[Bb]500((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2405:8100((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2[Aa]06:98[Cc][0-7]((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})|2[Cc]0[Ff]:[Ff]248((:(:[0-9A-Fa-f]{1,4}){1,5}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,4}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,3}|::|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){1,2}|::|:[0-9A-Fa-f]{1,4}(::[0-9A-Fa-f]{1,4}|::|:[0-9A-Fa-f]{1,4}(::|:[0-9A-Fa-f]{1,4}))))))|(:(:[0-9A-Fa-f]{1,4}){0,3}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4}){0,2}|:[0-9A-Fa-f]{1,4}(:(:[0-9A-Fa-f]{1,4})?|:[0-9A-Fa-f]{1,4}(:|:[0-9A-Fa-f]{1,4})))):(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3})
          "   />

So sorry, folks. When I first put this up, I quickly threw in a comment to the top of the gist...and I used a CFML comment (3 dashes). That's definitely NOT appropriate if you were to LEAVE it in the Tomcat xml file where you'd typically place this (server.xml). That could keep Tomcat from coming up, as XML processors like that used to load up Tomcat XML files would choke on the 3 dashes.

Sincere apologies. I just noticed it. Thankfully had yet commented or complained about it!