Title: Stop IPv6 Blocking Last modified: April 29, 2019 --- # Stop IPv6 Blocking * Resolved [jackmclean](https://wordpress.org/support/users/jackmclean/) * (@jackmclean) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/) * The plugin is causing IPv6 adresses to be blokced and it is breaking my htaccess. How can I temporarily stop it from blocking those addresses as they currently don’t work in my htaccess. Viewing 8 replies - 1 through 8 (of 8 total) * Thread Starter [jackmclean](https://wordpress.org/support/users/jackmclean/) * (@jackmclean) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11491866) * This is what was coming up and breaking my site: * SetEnvIF REMOTE_ADDR “^2404:f080:1101:0?322:0?150:0?0?95:0?113:0?209$” DenyAccess SetEnvIF X-FORWARDED-FOR “^2404:f080:1101:0?322:0?150:0?0?95:0?113:0?209$” DenyAccess SetEnvIF X-CLUSTER-CLIENT-IP “^2404:f080:1101:0?322:0?150:0?0?95:0?113:0?209$” DenyAccess * [nlpro](https://wordpress.org/support/users/nlpro/) * (@nlpro) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11492114) * When something in the .htaccess file breaks your site there is usually an error in the web server error_log. That error should point you in the right direction for solving the issue. * Is it just a blocked ipv6 address that breaks the site ? In other words are there also ipv4 addresses being blocked (likewise in the .htaccess file) that don’t break the site ? * Thread Starter [jackmclean](https://wordpress.org/support/users/jackmclean/) * (@jackmclean) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11492612) * It’s just the ip6 where it seems to be storing question marks in the htaccess( see latest update). * There’s not any ip4 issues, and there are plenty being blocked. * [nlpro](https://wordpress.org/support/users/nlpro/) * (@nlpro) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11492731) * Ok, so it looks like there is an issue with the ipv6 regex (regular expression) pattern being used. I’m pretty sure that if you remove all the question marks( or all the 0? combinations) from the ipv6 regex it will work fine. * (Edit: this doesn’t mean the ipv6 regex pattern is incorrect, it just means for some reason your Apache web server can’t handle it) * What Apache web server version is being used ? And is there any error logged in the Apache error_log ? * To prevent any confusion I’m not iThemes. - This reply was modified 7 years ago by [nlpro](https://wordpress.org/support/users/nlpro/). * Thread Starter [jackmclean](https://wordpress.org/support/users/jackmclean/) * (@jackmclean) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11492931) * Got this: * [Sat Apr 27 05:36:51.760463 2019] [core:alert] [pid 12305] [client 141.101.77.21: 14854] /var/www/html/drivebywebsites.co.uk/.htaccess: ip address ‘2604:880:a: 2:0:0:0:4009’ appears to be invalid: The specified IP address is invalid. [Sat Apr 27 05:36:51.824392 2019] [core:alert] [pid 12317] [client 141.101.105.229: 17748] /var/www/html/drivebywebsites.co.uk/.htaccess: ip address ‘2604:880:a: 2:0:0:0:4009’ appears to be invalid: The specified IP address is invalid. * apache24-2.4.39 * Also, this on a host which is only ipv4 * [nlpro](https://wordpress.org/support/users/nlpro/) * (@nlpro) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11493108) * Ok, I see. * This seems to be moving towards a server config issue. Not an issue with the iTSEc plugin. Perhaps you should contact your hosting provider. * Anyway one way to prevent any ipv6 addresses from being banned by the iTSec plugin is by disabling the **Ban Lists** option in the **Banned Users** module. Note this will also disable banning of ipv4 addresses. Unfortunately the iTSEc plugin does not provide a setting that allows you to enable/disable banning ipv6 or ipv4 addresses specifically. * Edit1: I tried pinging to both ipv6 addresses but they don’t seem to reply at all … I wonder whether that’s relevant. * Edit2: Make sure the iTSec plugin is configured properly, so that it’s detecting real (client) IP addresses. To do this goto the **Global Settings** module and scroll down to the **Proxy Detection** setting. If your site is **not** behind a proxy server change the setting (from Automatic) to **Disabled**. This will ensure the real (client) IP is detected (and not possibly a spoofed IP). Then click on the **Save Settings** button. - This reply was modified 7 years ago by [nlpro](https://wordpress.org/support/users/nlpro/). - This reply was modified 7 years ago by [nlpro](https://wordpress.org/support/users/nlpro/). * [nlpro](https://wordpress.org/support/users/nlpro/) * (@nlpro) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11493334) * Ignore Edit1 from my previous post. * Seems the site is using CloudFlare. If so, the site is behind a proxy. In that case make sure the **Proxy Detection** setting is set to **Manual**. And then select **Cf-Connecting-IP** as **Proxy Header** (If not already). * Thread Starter [jackmclean](https://wordpress.org/support/users/jackmclean/) * (@jackmclean) * [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11493434) * Fantastic. Many thanks for your help. I hadn’t considered the Cloudflare connection. I’m sure this will fix it. Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Stop IPv6 Blocking’ is closed to new replies. * ![](https://ps.w.org/better-wp-security/assets/icon.svg?rev=2980272) * [Solid Security – Password, Two Factor Authentication, and Brute Force Protection](https://wordpress.org/plugins/better-wp-security/) * [Frequently Asked Questions](https://wordpress.org/plugins/better-wp-security/#faq) * [Support Threads](https://wordpress.org/support/plugin/better-wp-security/) * [Active Topics](https://wordpress.org/support/plugin/better-wp-security/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/better-wp-security/unresolved/) * [Reviews](https://wordpress.org/support/plugin/better-wp-security/reviews/) * 8 replies * 2 participants * Last reply from: [jackmclean](https://wordpress.org/support/users/jackmclean/) * Last activity: [7 years ago](https://wordpress.org/support/topic/stop-ipv6-blocking/#post-11493434) * Status: resolved