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Posted April 24, 20159 yr I held down F5 on my Community. This would end with constant refresh, i checked the CPU while doing so and it went 100%.. I know this same issue existed on 3.4, i hope this will improve on 4.0 soon.. I replicated the same issue on here, i made the response time increase from 0.5 seconds to 16 seconds or even time out (using check-host.net) .. by just holding down F5 lol now my server is set up pretty well, i am using nginx mariadb, apc and memcached..
April 24, 20159 yr Not the dreaded "F5 SMASH" troll attack!!! Easiest Denial of service attack ever. Can something like this even be avoided programmatically?
April 24, 20159 yr Author Not the dreaded "F5 SMASH" troll attack!!! Easiest Denial of service attack ever. Can something like this even be avoided programmatically? ​i only know about one forum software where this happens and you can guess which *Cough*
April 24, 20159 yr This would be a server side configuration, a proper firewall will be able to detect multiple connections per xx seconds, and block the offending IP.
April 24, 20159 yr Author This would be a server side configuration, a proper firewall will be able to detect multiple connections per xx seconds, and block the offending IP.​I'm wondering why this happens on only IP.Board, out of other forum softwares I've tried? I can't manage to replicate same issue where CPU goes 100% no matter how many cores you have, by just holding down F5. Adding r/s is no issue, but still. Shouldn't be necessary, a website shouldn't be taken down by holding down F5..
April 24, 20159 yr a website shouldn't be taken down by holding down F5.. Sometimes I come to IPB site and hold F5 for 15-30 sec. I don't know why, but I like to see forum down with error. After that I watch how many time they need to start a server again. It can be 10-15 mins or even a day I tried it with many wordpress sites and never got them down.
April 24, 20159 yr Sometimes I come to IPB site and hold F5 for 15-30 sec. I don't know why, but I like to see forum down with error. After that I watch how many time they need to start a server again. It can be 10-15 mins or even a day I tryed it with many wordpress sites and never got them down. ​that was you?
April 24, 20159 yr ​that was you? ​It can be anyone who have F5 on the keyboard (... dont tell me your site name....) :)
April 24, 20159 yr yeah this doesn't seem good. Surely there is some fix. Clearly hitting F5 causes repeat queries to stack. Must be a way to detect and prevent query stack from same userid
April 24, 20159 yr Author Has to be a way to cache results for x amount of time, i don't really know but telling the user to get better firewall is wrong
April 24, 20159 yr There are several ways to prevent F5: 1) proper configuration of the server 2) use cache on every level - DB cache, HTML cache, Object cache and others 3) your method?
April 24, 20159 yr Author There are 3 ways to prevent F5: 1) proper configuration of the server 2) use cache on every level - DB cache, HTML cache, Object cache and others 3) your method?​my server is more than properly configured and it happens, i shouldn't need to add request limit because of the software, cus it doesnt work on any other CMS i've tried.. means there is something wrong with IPS
April 24, 20159 yr Author lol the site is lagging horribly, someone must be having fun http://techpulse.io/ try it here now and see my surprise lol
April 24, 20159 yr http://techpulse.io/ try it here now ​Got 404 and 403 errors several times with F5 but super fast recovering. How did you do that?
April 24, 20159 yr Author ​Got 404 and 403 errors several times with F5 but super fast recovering. How did you do that?​yeah was configuring it lol, should show a 503 now with a lil message
April 24, 20159 yr On my site and another one i configured, nothing happens. But i tested in other sites and i confirm it can take them down.
April 24, 20159 yr Author On my site and another one i configured, nothing happens. But i tested in other sites and i confirm it can take them down.​What did you configure, request limit?
April 24, 20159 yr ​What did you configure, request limit? ​Nothing. Its very well configured and optimized, but i did not implement a request limit. I tested pressing F5 for 15 minutes, Cpu raised a little bit, but no one noticed the site was being hammered.
April 24, 20159 yr Author ​Nothing. Its very well configured and optimized, but i did not implement a request limit. I tested pressing F5 for 15 minutes, Cpu raised a little bit, but no one noticed the site was being hammered. ​feel free to link it here and f5 army will test it xD is it http://www.fastnewsforum.net/
April 24, 20159 yr ​feel free to link it here and f5 army will test it xD is it http://www.fastnewsforum.net/ ​test iosgods.com
April 24, 20159 yr ​is it http://www.fastnewsforum.net/​ ​test iosgods.com​Both sites are OK. I dont know what will be if several people press F5 at same time?
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