Title: Solve a 404 after “save changes” from options-permalink.php Last modified: August 19, 2016 --- # Solve a 404 after “save changes” from options-permalink.php * [ndray](https://wordpress.org/support/users/ndray/) * (@ndray) * [17 years, 9 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/) * I can’t set permalinks in my blog because everytime (except when I choose ) I press “save changes” I get a 404 – Not Found. * I believe this could be a .htaccess or general server problem. Here is some info about the server: [http://bugflux.org/info.php](http://bugflux.org/info.php) It is a virtuozzo virtual server. * Hit me with everything you’ve got. I have a few more days before reclaiming unsatisfaction with the service ^^ * Thanks in advance. Viewing 11 replies - 1 through 11 (of 11 total) * Thread Starter [ndray](https://wordpress.org/support/users/ndray/) * (@ndray) * [17 years, 9 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851073) * I now know that mod_security2 is causing this problem. Disabling it is not a solution. * The module is blocking the POST: * Mon Sep 08 16:34:57 2008] [error] [client 213.22.159.193] ModSecurity: Access denied with code 400 (phase 2). Pattern match “\\\\%(?!$|\\\\W|[0-9a-fA-F]{2} |u[0-9a-fA-F]{4})” at ARGS:selection. [id “950107”] [msg “URL Encoding Abuse Attack Attempt”] [severity “WARNING”] [hostname “bugflux.org”] [uri “/wp-admin/ options-permalink.php”] [unique_id “KVUMRH8AAAEAAGwKyAoAAAAI”] * I’d like to know if there’s any workaround or solution for this as my host is not willing to disable it, and this should not happen anyways, I believe… * [alikhaliq](https://wordpress.org/support/users/alikhaliq/) * (@alikhaliq) * [17 years, 7 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851155) * I am having the same issue. I ve been trying to enable the xmlrpc posting option but everytime i click the save changes button the following error shows up: * Not Acceptable * An appropriate representation of the requested resource /blog/wp-admin/options. php could not be found on this server. * Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. * Can somebody please help me with this issue? * [ianmckendrick](https://wordpress.org/support/users/ianmckendrick/) * (@ianmckendrick) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851172) * I’m having the same problem too. When attempting to upload any images, or change any plugin parameters I get the following error: * Bad Request Your browser sent a request that this server could not understand. Client sent malformed Host header * After examining my logs I found the following entry: [Sun Dec 21 18:20:40 2008][ error] [client 84.12.106.26] ModSecurity: Access denied with code 400 (phase 2). Pattern match “\\\\%(?!$|\\\\W|[0-9a-fA-F]{2}|u[0-9a-fA-F]{4})” at ARGS:aktt_digest_title.[ id “950107”] [msg “URL Encoding Abuse Attack Attempt”] [severity “WARNING”] [ hostname “ianmckendrick.com”] [uri “/wp-admin/options-general.php”] [unique_id“ mYKe0H8AAAEAACegG2IAAAAB”] * Does anyone know how to overcome this please? * Thread Starter [ndray](https://wordpress.org/support/users/ndray/) * (@ndray) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851173) * “I” did manage to solve the problem… * I left the CMS alone for a while then, a few days later, I came back and saw that there was a newer wordpress version… I upgraded my instalation and the problem was gone. * I don’t know if the solution was the upgrade or something happened in my server… I did talk to them about the issue, maybe they did something… Try to figure what’s going on with your host providers… * [webmystery](https://wordpress.org/support/users/webmystery/) * (@webmystery) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851175) * I’m getting a 500 after attempting to add a text widget. My host error log shows this: ModSecurity: Access denied with code 500 (phase 2). Pattern match “<[:space:](http://codex.wordpress.org/:space:)*( script|about|applet|activex|chrome)*>.*(script|about|applet|activex|chrome)[:space:](http://codex.wordpress.org/:space:)* >” at REQUEST_BODY. [file “/etc/httpd/conf.d/modsec.rules.conf”] [line “318”][ hostname “www.webmystery.net”] [uri “/bloomarts/wp-admin/widgets.php”] [unique_id“ d0g@N0ggOZwAACvgM6YAAAAG”] * Maybe something to do with a DNS redirect?? * I still get the same error after upgrading to 2.7 I would suspect my host of implementing some new security protocol, but I’ve got other WP sites on the same server that aren’t having this problem. * It is very discouraging to come on this forum looking for answeres and find posts describing real and serious problems that haven’t been answered for months. ( sigh) * [iridiax](https://wordpress.org/support/users/iridiax/) * (@iridiax) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851176) * Your web host may be able to help you with this, but also see: * [http://wordpress.org/search/mod_security?forums=1](http://wordpress.org/search/mod_security?forums=1) * Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/) * (@ipstenu) * 🏳️‍🌈 Advisor and Activist * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851177) * webmystery, you may want to make a new post (as yours is a 500 error and this post is a 404). But. * Based on [http://wordpress.org/support/topic/226052?replies=2](http://wordpress.org/support/topic/226052?replies=2) I think you need to add the following to .htaccess * ``` SecFilterEngine Off ``` * There’s a list of mod_security posts here: [http://wordpress.org/tags/mod_security](http://wordpress.org/tags/mod_security) * [webmystery](https://wordpress.org/support/users/webmystery/) * (@webmystery) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851178) * Thanks, all * I’ve tried the .htaccess suggestion above, and some variations I found since in the other posts – no luck. * I’ll ask my allegedly wordpress friendly webhost if they have a suggestion. still really weird that this happens on only one of my wp sites with that host. I tried a clean install and a vanilla template with the same results. * I was getting a 404 error before I upgraded to 2.7, the only change is that it is now returning a 500 error * [webmystery](https://wordpress.org/support/users/webmystery/) * (@webmystery) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851179) * My host fixed it, and fast (laughingSquid.net)! ! Don’t even bother with the htaccess stuff if you have a responsive host. * Moderator [Ipstenu (Mika Epstein)](https://wordpress.org/support/users/ipstenu/) * (@ipstenu) * 🏳️‍🌈 Advisor and Activist * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851180) * How did they fix it? * [webmystery](https://wordpress.org/support/users/webmystery/) * (@webmystery) * [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851183) * “I’ve whitelisted the modsecurity rule catching this, please give it a try now and let me know if you’re still running into problems.” Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Solve a 404 after “save changes” from options-permalink.php’ is closed to new replies. ## Tags * [mod_security](https://wordpress.org/support/topic-tag/mod_security/) * [not-found](https://wordpress.org/support/topic-tag/not-found/) * [permalinks](https://wordpress.org/support/topic-tag/permalinks/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 11 replies * 6 participants * Last reply from: [webmystery](https://wordpress.org/support/users/webmystery/) * Last activity: [17 years, 5 months ago](https://wordpress.org/support/topic/solve-a-404-after-save-changes-from-options-permalinkphp/#post-851183) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics