I downloaded the logfile and searched for the ip and there were nothing to see, only a 404 error (the 406 did not exists) and the owner of the host said this last night:
"We don't recommend allowing blacklisted ip's as thats usually where spam and hack attempts come from."I went and looked through logs and found the site to be rejecting them based of the RBL listings and not the browser related so they'll still be blocked".
I checked the last 406 I could see in error log as the errors quickly disappears and all where in spamhaus xbl and when I read spamhaus xbl faqs they tell hosts not to block these ips to access the server as they will be blocking inocent people. So they were blocking internet providers that were on spamhaus list saying spammers and hackers came from there.
Angry the host last night he said he has disabled blacklisting to access my account.
Regarding the 500 error its related to my chatprogram that is offered by cpanel-fantastico that I been using since may and had problem when they installed mod_something last summer as they had problems with wordpress, at that moment I got 500 error every time I opened the chat and had to argue with the host that it was not the program that was bad, suddenly the bug was fixed however the host said they had not changed anything.
On the 6th january the host migrated the server to a new hardware. On the 13th january I reported that I could not access my password protected directory as I got a 500 error and the emails didnt work well. They had cpanel to fix it and was fixed some hours later.
Not much later I reported that sometimes when I opened chat I get 500 error and had to refresh, however that became worse and worse and I started to look and saw in errorlogfile that the chat gave error 500, in resourge usage I had sometimes max memory usage in 384 m while the average was maybe 1.x something. This has been worse and worse, now I cant open the chat as I get 500 and memory rize to 384.0 mMEM, I have taken away the links to the chat to see if I get high numbers without it, and I do get but not that often.
For exempel this is from about 4.00 in spain where I live and normally we have few visitors as we are in europe:
01-20 20:00 01-20 21:00 0 20 0 1 20 624K 255.6M 384.0M
As you can see the average is 624k but the max reached is 255.6.
Number that sounds just crazy to me, hour when I was sleeping and I dont have any automatic processes, and of course my chatpage was closed as I was sleeping and pc shut down.
And the host says that its a script error, but I have not done any change at all to the chat, its not my script I dont even understands it, and I seen in resourge usage having a look for last 30 days that it started to show high max on the 13th between 16-17.00 that is about 24.00-1.00 in spain. I had ever had so high numbers before.
Any help is appreciated.