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I'm not very technical so apologies up front! Unfortunately, I've been left to figure this out though as the company who deal with my dedicated server are being less than helpful.

Really hoping someone can shed some light on this. We host around 100 websites and currently, all sites on our server are up and down like yoyos. There doesn't seem to be a pattern - it's very sporadic and intermittent. Usually, you can just click around one of the sites, for example www.innivo.com for a few mins and you’ll see the site drop out, and then after a few refreshes, it will come back, then back down – you get the idea.

In Chrome, I get: No data received

Unable to load the web page because the server sent no data.

Error code: ERR_EMPTY_RESPONSE

In Firefox I get: The connection was reset

The connection to the server was reset while the page was loading.

The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.

The server doesn’t go down completely, it just doesn’t seem to serve the page. This also agrees with the firewall theory I mentioned on the call.

We have paid a lot of money to a security company who have removed a few bits of malware in the hope that it would fix the problem, but they now say that the server is completely clean and exploit free. My service provider is saying they won't help until I upgrade PHP on the server but although I'm going to do this, I'm pretty sure that this won't fix the sites dropping out all the time.

I found this post which describes EXACTLY what is happening, but he doesn’t really say how to fix it, or even if his ever got fixed but it’s the closest thing I’ve found! http://progblog10.blogspot.co.uk/2013/09/modsecurity-causes-sporadic-no-data.html

I looked for this on the server but mod_security didn’t seem to exist otherwise I would have tried to disable it to see if it made a difference. I think though, that this firewall theory sounds plausible. I wonder if we have some other type of firewall which was maybe activated or updated when we updated CPanel last week.

I'm running WHM / CPanel / Apache

Any help would be massively appreciated. Hoping that this has happened to someone else!

stowbee
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  • Also worth noting that this has been happening since Sunday. I did a CPanel update last week so I'm wondering if that has something to do with it? – stowbee Oct 17 '13 at 20:55
  • Have a look at the logs, if you are using a Debian-based system, /var/log/syslog, /var/log/kern.log and /var/log/apache2/error.log – Lorenz Oct 17 '13 at 21:06
  • Thanks. The server admin checked the logs and it all looked normal - couldn't see anything. The sites ping fine, traceroute fine. – stowbee Oct 17 '13 at 21:08
  • This happens when the server crashes (only one Apache child, and it respawns). I had that some time ago with an incompatible shared library. Try to disable some Apache2 mods and look if the error persists. – Lorenz Oct 17 '13 at 21:11
  • Thanks Aragon0. Do I do this in WHM? I don't have SSH access but I do have root access to the FTP and to WHM. – stowbee Oct 17 '13 at 21:18
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    You can try to delete symlinks in /etc/apache2/mods-enabled (Ubuntu, I don't know the path in other distributions) and restart apache2 in WHM/cPanel. If you can execute commands from WHM, try a2dismod, it disables apache2 mods, a2enmod enables them. Both commands require a restart of apache2. I don't know WHM very well, I usually work directly from SSH. – Lorenz Oct 17 '13 at 23:59
  • I'm having a very similar issue but it is only occurring on IIS localhost. It is always down and never works. If anyone can help please go to the link http://stackoverflow.com/questions/25632597/iis-localhost-not-loading. Thanks, sorry I cant help you – Chris Sep 03 '14 at 14:32

2 Answers2

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My personal experience. I have xplornet. I was unable to access a local site with none of my browsers. I have my computer, my Hughes, my printer, my monitor all plugged into a power bar. I shut off the computer, Unplugged everything including the plug in on the back of the hughes. Left it for a few minutes then plugged everything back in into different outlets on the power bar. I was able to access the site after that. Why I have no idea but it worked.

Marlene
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ive been struggling with this error and i think i have found the solution . I ran my website on local host( MAMP ) . Its worked fine so i called my hosting provider and they said i needed an upgrade cos my existing account did not support simultaneous connections . So i upgraded and its perfectly working

Saeed
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