During DDoS, PHP pages don't work

[hadyabed]

Hey guys,
I'm having a problem, when my server gets DDoS attacked, no PHP applications work but say I try to load like website.com/blahblah or any other page that isn't there that produces a not found output, that's still running quick. How can I tune my PHP application for DDoS?
Thanks,
Hady Abed

 

[mistwang]

You need to restore the default configuration for lsphp.
You can find the default configuration values in lsws-3.3.8/add-ons/directadmin/httpd_config.xml

 

[hadyabed]

Mistwang,
Okay, I've restored those values but it seems my PHP is still having issues. I know you don't like providing free support, but if you're willing to take a quick look, please PM me and I'll give you my LiteSpeed Web Admin Login.
Thanks,
Hady Abed

 

[mistwang]

You have done something special for '/home", other pages are working fine.

 

[hadyabed]

No, I put up a page saying there was problems with the PHP core, the other pages don't work fine.

 

[mistwang]

http://hr-development.net/services
http://hr-development.net/portfolio
http://hr-development.net/hosting
http://hr-development.net/contact
http://hr-development.net/quote

all are working fine, only http://hr-development.net/home is broken. it is not a PHP problem, probably a URL rewrite problem if you use URL rewrite to make URL SE friendly.

 

[hadyabed]

http://hr-development.net/services
http://hr-development.net/portfolio
http://hr-development.net/hosting
http://hr-development.net/contact
http://hr-development.net/quote

all are working fine, only http://hr-development.net/home is broken. it is not a PHP problem, probably a URL rewrite problem if you use URL rewrite to make URL SE friendly.

If you refresh any of those pages about 3 times, it doesn't load very fast, it wasn't like this before.
-Hady Abed

 

[mistwang]

It looks like firewall or network problem, google "ip_conntrack" and make sure it hsa been set large enough.

 

[hadyabed]

It's set to 65536. So many issues lately.
-Hady Abed

 

[anewday]

Try to turn off firewall and test again.

 

[hadyabed]

Try to turn off firewall and test again.

I need the firewall though. I offer DDoS protected hosting..
-Hady Abed

 

[hadyabed]

Okay.. It doesn't look like this is going to be resolved. Thanks...
-Hady Abed

 

[anewday]

Just to test if it's a firewall issue, you don't need to turn it off permanently....

 

[hadyabed]

Thanks for the advice but it seems to have fixed itself somehow. I don't know how, but oh well, at least it's fixed.
-Hady Abed

 

[mistwang]

Your problem has nothing to do with PHP, if you check your page with "Firebig" (Firefox add-on), you will find that some static files take long time to load. I believe which should because of network or firewall issue.
You need to find out where is your problem first, so disabling each of your DDoS configuration temporarily is a good way to figure it out.