451 - The Server Has Reached Its Limit For Processing Requests From Your Host

Dec 3, 2007

An user is reporting this error receiving emails:

451 - The server has reached its limit for processing requests from your host

I've searched for this error message but haven't found much info

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Reached SMTP Relay Limit

Jun 11, 2008

GoDaddy says: "You have reached your current SMTP relay limit of 1000 per day on the following hosting account" But they assigned a limit of 1,000 -- and i don't use SMTP relay at all. I have set up my active email accounts to use Google SMTP. When I tell GoDaddy about this, they tell me it is my responsibility. So what do i do?

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WARNING: NR_CPUS Limit Of 1 Reached. Processor Ignored

Nov 24, 2008

grep CPU /var/log/dmesg
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
WARNING: NR_CPUS limit of 1 reached. Processor ignored.
Virtuozzo Fair CPU scheduler
Initializing CPU#0
CPU: After generic identify, caps: bfebfbff 20100000 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 20100000 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 2048K
CPU: After all inits, caps: bfebf3ff 20100000 00000000 00000180
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (24) available
CPU0: Thermal monitoring enabled
CPU: Intel(R) Xeon(TM) CPU 2.80GHz stepping 08
ACPI: Processor [CPU0] (supports C1)
uname -a

Linux server.domain.com 2.6.9-023stab048.4 #1 Fri Jul 11 17:50:54 MSD 2008 i686 i686 i386 GNU/Linux
cat /etc/redhat-release
CentOS release 4.3 (Final)

This is a dual core, dual xeon server so it should be 8 processors total.

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CPanel E-mail :: SMTP Server - Retry Time Not Reached For Any Host

Oct 25, 2007

I have a problem with customer that use my smtp server, looking in the log i have found this error

T=remote_smtp defer (-53): retry time not reached for any host

what is it?

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Plesk 12.x / Linux :: What Happens When Limit For Outgoing Mail Is Reached

Jul 16, 2014

In the documentation for Plesk 12 there is no information on what is happening if the limit for outgoing mail is reached.

If there is a limit of 50 mails per hour on a mail account and someone is trying to send 60 mails in one hour, what does happen with these 10 mails over limit?

1. Are there send 50 mails and the rest of 10 mails are deleted and will never be sent?
2. Or are these 10 mails sent later?
3. Can there be sent more mails in the next hour or is the mail account now blocked for sending mails?

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Exim Sda7: Write Failed, User Block Limit Reached

May 23, 2009

i have run exim -qff from SSH then i got below error let me know what to do

root@web [~]# exim -qff
sda7: write failed, user block limit reached.
sda7: write failed, user block limit reached.
sda7: write failed, user block limit reached.

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T=remote_smtp Defer (-53): Retry Time Not Reached For Any Host

May 5, 2009

Getting an error specifically to sympatico ISP in Canada.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

retry timeout exceeded

exim_mainlog shows:

T=remote_smtp defer (-53): retry time not reached for any host

telnet sympatico.ca 25
telnet: connect to address Connection refused
telnet: Unable to connect to remote host: Connection refused

Port 25 adn 53 are open in my CSF firewall (cpanel server), TCP and UDP (for 53) and TCP for 25.

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Virtual Host Redirects All Requests

Dec 31, 2007

I just went with Steadcom's VPS and they are great. I am setting things up and it's going pretty well, I have to dust off my linux/server knowledge that I haven't used in a couple of years.

Anyway I'm creating a virtual host.. I will have about 10 in the end, but right now I only have one domain IP Pointing to my new server. My registrar is NamesDirect.

When I create the virtual host, I can no longer access subdirectories directly. My Virtual Host directory is, say, /var/www/html/newdir

If I try to reach http://www.domainname.com which has been configued as a virtual host, that comes up correctly from the directory /var/www/html/newdir and works fine.

But if I try to reach http://myipaddress/newdir I get a 404 page not found error. Looking at the log, it's trying to reach /var/www/html/newdir/newdir so it's putting in the virtual host redirect even for just hitting the subdirectory directly.

Is this normal? Do I have something configured wrong? I have another domain that I have changed to IP Point to the VPS but until it propogates I won't be able to test having 2 virtual hosts.

Also.. I have not set up DNS on my VPS. I don't really understand it, and IP Pointing has always worked for me when I ran my own server form my home so I was just going to do that. But I wonder if this could be one of the problems.

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Apache :: Forwarding Requests To A Custom Process On Host

Apr 10, 2013

I'm looking to pass the entries to a web form, via Apache, to an external process (listening on a port say 4321) running on the same host as Apache.Is there a way to "coerce" Apache into doing this?

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Server Reached Maxclients

Mar 25, 2008

I`m on VPS 768Ram WHM/Cpanel

when i check error log on apache i see that error around 5 times daily.

[error] server reached MaxClients setting, consider raising the MaxClients setting

the apache restart automatically (~3 second). and that the problem when user make downloading all connections CUT.

my httpd.conf

maxclients 150
maxrequestperchild 0

i can increase maxclients no problem but i don`t know if i need to do something else or not.

Is there any way to LIMIT connection ( if server get more than 256 connection it says SERVER BUSY and doesn`t accept any connection )

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Apache :: Server Can't Be Reached

May 27, 2014

Every night at the same time HTTPD gets overloaded and stops running. I have to do a reboot. What could be the problem?

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Host With No Email Limit Cap

Nov 8, 2008

is there a known and reliable webhost that offers unlimited emails from being sent? I currently use hostgator and they have a 500 email cap per hour and considering that I have 8000 members that eliminates the purpose of a newsletter.

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Windows Server And Encoders And Processing Tools

May 4, 2009

We have Detected server and we use windows server 32 bit , and we are using this server To Encode Video From Avi To Mp4 , But the Problem is we can not get any avi files to play , we Reload the OS and Install it again and We install all the Codec Windows Need But we steel can not Get this video work , its really strange ,

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CPanel :: Server Load Notification While Processing Log Files For User

Jan 17, 2015

I am having this error message

IMPORTANT: Do not ignore this email. This is cPanel stats runner on xx.xxxx.com!

While processing the log files for user xxxxx, the cpu has bee maxed out for more than a 6 hour period. The current load/uptime line on the server at the time of this email is

13:17:58 up 6:55, 0 users, load average: 30.95, 31.00, 30.85

what should I do?

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Server Sending Bad Requests

Jul 25, 2008

my server is still effed up from the MPack attack that I received.

I just received the following email, does anyone know what this means or how it could be done? The client IP is mine, so some how my server is sending that request? (malwarebytes.org) Server Log:

[Thu Jul 24 13:05:07 2008] [error] [client] mod_security:
Access denied with code 403. Pattern match ".../" at THE_REQUEST
[id "300006"] [rev "1"] [msg "Bogus Path denied"] [severity "CRITICAL"]
[hostname "www.malwarebytes.org"] [uri
"/errors.php?error=[url][unique_id "tNAGeH8AAAEAAEsfD7wAAAAO"]
[Thu Jul 24 13:05:07 2008] [error] [client] mod_security:
Access denied with code 403. Pattern match ".../" at THE_REQUEST
[id "300006"] [rev "1"] [msg "Bogus Path denied"] [severity "CRITICAL"]
[hostname "www.malwarebytes.org"] [uri

[url]is the RKHunter scan log
[url]is the ChkRootKit scan log.

I'm going through this thread right now:
[url]("How-to detect a possible intruder?") and I've come across a handful of hidden directories:

/home/mifbody/public_html/vbulletin/arcade/images/. /. /xh
/home/mifbody/public_html/vbulletin/arcade/images/. /. /xhide.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/convertxdccfile.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_admin.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_dccchat.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_display.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_main.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_md5.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_misc.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_statefile.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_transfer.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_upload.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /obj/iroffer_utilities.o
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/convertxdccfile.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_admin.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_config.h
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_dccchat.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_defines.h
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_display.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_globals.h
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_headers.h
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_main.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_md5.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_md5.h
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_misc.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_statefile.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_transfer.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_upload.c
/home/mifbody/public_html/vbulletin/arcade/images/. /. /src/iroffer_utilities.c

I was able to successfully delete all the files, but how do I now get rid of the directories themselves? When I do:
rm -fr "/arcade/images/. /"
and then locate ". "
I still get:


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All Http Requests To My Server Redirected

Oct 8, 2007

There seems to be some problem with my server, none of the websites hosted on my server are accessible, the http requests either return a blank page or a page with a red quare on the upper left hand corner.

I am not sure if this is some kind of infection or DNS problem or a problem with memory apache is taking up
as i have thousands of virtualhost entries in my access log accumulated over the years out of which only a few 100 websites i am serving presently, but never deleted the non-exitent virtualhost blocks.

At times the websites are opening but most of the times they are not. And when they do not open my http requets are not logged in apacha access log.

Even the customers have reported the same problem.

Also, just four days back i had a strange issue where all
http requests to my server would take me to [url].

I can SSH to server, and everything else is working fine.

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Apache :: Server IP Making GET Requests

Apr 12, 2014

I've spent the last several months working on a huge upgrade of a couple dozen websites. The upgrades include modifying Apache so that visitors who arrive at links pointing to mysite/World/New_York are redirected to mysite/world/new-york. In other words, all my links now default to lower case, and underscores are replaced with dashes.

Unfortunately, publishing it has been an endless series of disasters. My websites are now all crashed, and the server is unbelievably slow. It takes pages forever to load (if they load at all), and I can scarcely publish files online.So the following notice sent to me by my webhost got my attention.

IT appears your own server IP is making GET requests to Apache, causing excessive loading and causing service failures. On today's date, your IP made almost 6,000 connections to Apache:<br><br>

[root@host ~]# grep /usr/local/apache/domlogs/mysite.org | wc -l 5924 [root@host ~]#<br><br>

These were all the same request:<br><br> - - [12/Apr/2014:08:10:10 -0400] "GET /404.php HTTP/1.0" 200 14294 "-" "-"<br><br>
And that made up the total of requests:<br><br>
[root@host ~]# grep /usr/local/apache/domlogs/mysite.org | grep "GET /404.php HTTP/1.0" | wc -l 5924 [root@host ~]#<br><br>

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Too Many DNS (Domain Name Server) Requests. How To Make It Lower ?

May 8, 2007

I host my DNS with DNSmadeeasy.com , I noticed that I have daily more than 350.000 DNS requests for main domain, This domains got about 80.000 uniqes/day, so this is strange how can there be 350.000 DNS requests/day. Seems that I'll go over the quota because of this.

The TTL for all domains is set to 86400.

Is there a way to discover how its possible ? And also is there a way to do something to make this number lower (DNS requests)

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The Server's Visible IP Address For Outgoing Requests

Apr 20, 2008

Where is a server's IP address for outgoing requests set? e.g. if a script on the server fetches ip-address.com, the IP that is identified there. A server may have multiple IPs pointing to it, but there's only one that outgoing requests are funneled through. I've tried changing "Main Shared IP" in WHM, but that doesn't seem to affect this.

Is this set server-side, in some setting file - or is this a datacenter thing?

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Apache Overloading Due To Requests To My Main Domain Name Server (DNS) Name

Jan 19, 2008

I currently have a web VPS hosted with FDCServers.net and after 5 days of switching to it i am getting massive HTTP requests. When i login to WHM and hit apache status i have many requests per second by multiple IP's that are going to pages that simple don't exist. Currently my hostname for the server is set at web-01.optical-hosting.com which is what the requests are being sent to. I am also having a DNS issue because when i put http://web-01.optical-hosting.com in the web browser it displays the first account's site under "list accounts" in cpanel. Can someone please help me fix both of these issue's? i will post an apache log in a second post as it is long. Also, these are from overseas. please someone help me with this i have Aim and Msn.

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All HTTP Requests To My Server Gets Redirected To Malware Websites

Jul 24, 2009

When i try to open any website hosted on my server (around 50 of them) i am being taken to following malware website;

This is a problem with my Limnux server running Apache and not a virus on my local computer as customers from all over are reporting the same issue.

As soon as i restart Apache eveything returns to normal with no such redirects.

I think my server is being attacked causing http requests to get redirected to some malicious website.

This issue would resurface almost every hour and would not go away till i restart apache.

So far my Datacenter techs. have not been able to identify the cause of this.

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Apache Down With 503 Error / Http Requests Get Redirected / Is Server Hacked

Jun 4, 2009

My Linux Server's Http Daemon (Apache) would stop serving websites ever so often, as soon as apache is restarted the error fixes iteself only to resurface within few hours.

The apache process would still be running i.e. apache does not die but no websites hosted on my server would be accessible from browser. And when this happens the apache logs do not log any http requests.

Instead when this happens all http requests to my server would be redirected to some weird Trojan website and my Norton Antivirus would show an Alert/Warning, for example;
"Browser exploit at www.xxx.xxx was blocked"
Risk Name: MSIE WebViewFolderIcon ActiveX Control BO

or another error like;
"Auto-Protect has detected Trojan.Fakeavalert".

At first i thought the problem could be with my Laptop/ISP so i logged on to the server via SSH and opened try to open a website using command line "lynx mywebsite.com" and it shows following error;
"Alert!: HTTP/1.0 503 Service Unavailable".

Now if i assume my laptop were to be infected, then as soon as i restart my apache and visit mywebsite.com eveything returns to normal with no such warnings. Why do i see those norton error messages only when apache is down with 503, and when apache is down with 503 how come the http requests always get redirected to some suspicious websites and nothing gets logged in apache error log?

I think my server is being attacked causing http to get unresponsive and thereafter http requests to my server are redirected to some malicious website, is this correct?

Also, i suspect this is a php script exploit as some customers have reported that google have blocked their website due to security reasons, i found <iframe> tage inserted in some php pages which i fixed.

Also, another thinh i noticed;
when apache responds with the 503 it is referencing PHP 5.1.4 in the header response:

[root@]# curl -I xxx.xxx.xxx.xxx (my server ip)
HTTP/1.0 503 Service Unavailable
Server: Apache
X-Powered-By: PHP/5.1.4
Retry-After: 20

I am running PHP 4.3.9m why does apache responds with PHP 5.1.4 when this 503 error surfaces?

Also, since my apache was dowan with 503 error a customer mailed in today saying;
"It seems that my site www.xxxx.com is regularly down, and the winlogon virus is involved."

I suspect this is again due to the fact that http requests start getting redirected?

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Apache :: Server Ran Out Of Threads To Serve Requests - ThreadsPerChild Settings

Mar 27, 2013

I'm running Apache 2.4.4 on Windows Server 2008 R2. It's already happened many times that Apache stopped responding to requests. The last entry in the error.log:

[Wed Mar 27 06:22:07.043600 2013] [mpm_winnt:notice] [pid 1736:tid 256] AH00354: Child: Starting 64 worker threads.
[Wed Mar 27 06:52:34.521200 2013] [mpm_winnt:error] [pid 1736:tid 1656] AH00326: Server ran out of threads to serve requests. Consider raising the ThreadsPerChild setting

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Redirect 8080 Requests To 80 Port - Tomcat Problem At CPanel Server

Jan 31, 2008

Yesterday I installed tomcat on a RHEL 4 + cPanel and httpd 2.0.63 server using easyapache3, process was ok, jsp pages are loading fine using http://site.com/example.jsp , but servlets, are not working using http://site.com/example, how ever, if I load http://site.com:8080/example it loads the servlet perfect.

I read something about redirecting all traffict from port 80 to 8080, but you know.. this is a shared server, and that would affect all customers on the server.

So, mod_jk seems to be the only solution, now I read many documents over the web, but no one seems to be working to configure apache2 and mod_jk that is installed using easyapache3 script.

In my httpd.conf file, i have this:

LoadModule jk_module modules/mod_jk.so
Include "/usr/local/apache/conf/jk.conf"
At jk.conf i have this content: ...

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Automatic Suspend Sites Which Reached To It's Limited Resources

Nov 1, 2008

i'm asking about the script which install in linux servers and automatic suspend sites which over it's limit resources in ram and cpu , like used in big hosting company ....

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Data CPanel :: Could Not Restore Account - Time Out Reached

Oct 10, 2014

I am trying to restore a rather large account for a customer of mine - about 35 gb , well not so large, however i am getting this:

Could not restore account “zemtv”: time out reached ...

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CPanel :: File System Rootfs Has Reached Warn Status Because It Is 90% Full

Jan 14, 2015

I am receiving this email message titled "The file system rootfs, which is mounted at /, has reached warn status because it is 90% full."

The rootfs & /dev/root is 90% full (please see bellow). What Can I do now? How to clean this and get free spaces?


root@host [/]# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 49G 42G 4.9G 90% /
/dev/root 49G 42G 4.9G 90% /
devtmpfs 16G 272K 16G 1% /dev
/dev/md3 1.8T 17G 1.7T 1% /home
tmpfs 16G 0 16G 0% /dev/shm
/dev/loop0 485M 11M 449M 3% /tmp
/dev/loop0 485M 11M 449M 3% /var/tmp

I also found this 16 GB files here:


root@host [/var]# find /var -type f -size +500000k -exec ls -lh {} ; | awk '{ print $9 ": " $5 }'
/var/log/messages: 19G

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Iptables Processing

Apr 23, 2007

I used a script to block some unwanted countries from accessing my site. In total I had about 3000 lines with ipranges. Now I just went ahead and put this on one of the servers, one that I really don't need the traffic on. But I am wondering what kind of affect this may have on the speeds. Will it really affect it more then a few ms? And anything else I should maybe worry about? Except maybe the loading time at reboots.

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Centos Processing

Apr 1, 2009

im running centos and have a fairly high-end server. yet my services seem to be running a bit sluggish. is there a way to differntiate if its the server or the connection?

using free -m -t im only using half of my ram

(i dont know the command to check how much of my processors im using). im going to assume that that is also 50% or below. if any one has this command please let me know. if its not either of those im guessing its either bad routing be bounced everywhere, or some more localize like datacenter issue, bad router or something.

on a side note whast the command to restart sftp?

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External Processing

Jun 13, 2008

I have a hosting provider who cannot provide enough ram to run my one time PHP script (gallery2) (and has a automatic background program kill my task)

So I would like to use processing and ram outside of that server.. via one of my other web servers.. (Dual 1 Ghz, 1 gb of ram) the thing is that the servers got plenty of power but not as much space..

So the ideal solution.. would be to utilize it's power while having it access the hard drive/data remotely and processing it remotely... using the internet/ssh to do this..

Does anyone first off know that this is possible?

2ndly what would be some of the commands?

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CPU For For Video Processing (ffmpeg)

Apr 19, 2009

What sort of CPU would one need for video conversions using ffmpeg?

Is 8 core necessary or is Quad core powerful enough?

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