CentOS 5 Networking :: DNS Requests Go To Localhost When Made By Apache / Php
Oct 7, 2009
I'm running wordpress and have gone to the painstaking effort of setting up the ftp server on my 5.3 machine so it can do its own updates and download plugins. However, I've found that if I try to download anything, I get a "unable to resolve host..." error from the script. If I watch Iptraf while making the request, I see all the port 53 requests going to 127.0.0.1. Pings are too.
However, if I ssh in, I can ping and wget and whatever I want all day long and all the DNS requests to go the router (Clarkconnect 3.2 gateway machine). The web browser in the terminal works fine too. What is it about the php scripts that is causing them to misdirect pings and dns requests? I've never seen anything like it and can't find anything on the web about it either.
[Code]....
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Dec 27, 2010
I have setup a Linux Centos with apache server on it in a home network. Everything works fine. When I access the webserver I put in the address bar the IP address of the server which is 192.168.0.150 and when hit enter, it prompts the page where I have to put login information. The login information is set to: username: admin@localhost.local password: *************
It takes long time for authentication go through and load the page eventhough I am accessing the site in a same home local area network with fast ethernet connection. How can I change the localhost.local to something else like maybe [URL] instead and if I have to change settings in other files as well?
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Mar 29, 2009
I have installed apache. The problem is that localhost works but not the ip for viewing my hosted sites.
How can i rectify this error?
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Jul 16, 2010
Question 1: Hey. I noticed i have quite a few logs that end with .[number] for example "syslog.1" "mail.info.1" etc, why is this and why are they there since almost nothing is logged in them ??
Question 2: on my server im running a script like imagebam and imageshack with hosts images so i have quite a few apache requests to my server. I am wonder why apache takes up so much CPU for some of the requests ? in Htop some requests take up 1.2% CPU while other take up 3-5% etc, so the total load is about 1.50 0.58 0.84 to 2.61 1.08 1.14 with about 128-150 apache requests all the time while sometimes the CPU load can be almost 0 with the same ammount of requests. is this normal? what could cause this in apache ?? the server is just running apache2. MYSQL is running on another server.
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Sep 6, 2010
I've been scouring the message boards and trying different things for two days and haven't found a solution. I set up Ubuntu 10.04.1 a few days ago using the server iso and selected the LAMP installation option. I will be using it as a sandbox to try out things from a PHP/MySQL book I purchased.
I have installed Gnome since sometimes I just can't get the command prompt to let me do things and Gnome may at least tell me why. I also installed PHPMyadmin.
My problem is that I can work with this thing all I want in any way I want - HTTP, SSH, SFTP, etc. - from within my home network but Apache refuses to respond to an outside request. Since it's only a test box it usually wouldn't be that big of a deal but I am going out of town for a couple of days and would really like to start working with my new book.
I am 99% sure my ISP is not blocking any ports. I have a ComTrend ADSL modem with router. I have given my Apache server a static IP on the NAT (xxx.xxx.x.101) and set up a dyndns address so I don't have to keep remembering the IP address.
Here is what I have tried so far: Setup a virtual server (port forwarding) on the router to to direct traffic on port 80 to internal IP .101The router told me its interface is using 80 so it would move itself to 8080 Made sure to also add port trigger for port 80 Made sure to save/reset the router Used my iPhone to connect via 3G - didn't work using IP or dyndns name Used iPhone to connect to 8080 and router responded
Set port forwarding/triggering for 8080 -> 80. No joy there, either Tried changing listening port to 8000Set port forwarding and triggering to allow port 8000 Changed ports.conf to read NameVirtualHost *:8000 and Listen 8000 Changed first line of /etc/apache2/sites-enabled/000-default to <VirtualHost *:8000> Restarted Apache service
Apache responded to dyndns.com:8000 from home machine No response when trying same on iPhone (sorry, it's the easiest way for me to test from outside my home network)
At one point, I added "ServerName localhost" to the otherwise empty httpd.conf file but that didn't seem to do a darn thing.
Many of the posts I have perused are at least a couple of years old and have included information on taking action with files that are not there or are no longer where they were. I have interpolated where I can but so far nothing has worked.
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Oct 16, 2010
my server into the public internet and must have my webserver [2.2.9 (Debian)] act secure. But this does not look very easy [I am searching, reading and working on it already the whole day ]. I read the apache docs, but there is a lot of stuff, which is different in Debian [lenny, 5.0.6]. Apache ignores the host-header given by the browser: [URL] are all served, but should be blocked. I new new to apachy, but on my IIS this works as expected. All browsers act equal [so no browser header problem].I configured two VirtualHosts, an excerpt:
NameVirtualHost hugo:80
<VirtualHost hugo:80>
DocumentRoot /usr/share/doc
[code]....
The I go to my hosts file on any box, and add hugo's ip-address under the new name x. Then, x is served, although the host-header in apache Every user coming from the internet could make the same!
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Mar 7, 2011
For some of the files that I share using Apache, I want to make sure that they are served ONLY via https.
How can I configure this for Apache?
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Mar 30, 2010
I noticed i have quite a few logs that end with .[number] for example "syslog.1" "mail.info.1" etc, why is this and why are they there since almost nothing is logged in them ??
Question 2: on my server im running a script like imagebam and imageshack with hosts images so i have quite a few apache requests to my server. I am wonder why apache takes up so much CPU for some of the requests? in Htop some requests take up 1.2% CPU while other take up 3-5% etc, so the total load is about 1.50 0.58 0.84 to 2.61 1.08 1.14 with about 128-150 apache requests all the time while sometimes the CPU load can be almost 0 with the same ammount of requests. is this normal? what could cause this in apache ?? the server is just running apache2. MYSQL is running on another server.
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Feb 6, 2011
I'm trying to figure out how I can get a request count per CIDR/24 from an apache log in combined format - e.g.:
Code:
24.147.44.122 - frank [10/Oct/2011:13:55:36 -0700] "GET /apache_pb.gif HTTP/1.0" 200 2326 "[URL] "Mozilla/4.08 [en] (Win98; I ;Nav)"
I'm stuck using BASH for this and I generally write everything in Python, or even Perl if necessary so BASH isn't the most comfortable for me. I've got enough to extract the IPs and get a count I just need a slick way to come up with a sum on a per CIDR basis.
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Mar 13, 2009
it was not working and ping is not reply me and I add ifconfig lo 127.0.0.1 it is working and getting ping but when reboot it is lost setting how can I set it for always ping working.
PING localhost (127.0.0.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ifconfig lo 127.0.0.1 later
[Code]....
now working but IWant reboot later working about same. how can I setting it boot start this .
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Nov 14, 2009
I'm working on a thorny mod_rewrite problem. I have a mac connected to my LAN running MAMP (Mac/Apache/MySQL/PHP). I request a non-existent file:
Code:
http://192.168.1.2:8888/careers/db/1.html
I see this in the mod_rewrite log file:
Code:
192.168.1.102 - - [14/Nov/2009:13:46:07 --0800] [192.168.1.2/sid#807df8][rid#8ec850/initial] (2) init rewrite engine with requested uri /careers/db/1.html
192.168.1.102 - - [14/Nov/2009:13:46:07 --0800] [192.168.1.2/sid#807df8][rid#8ec850/initial] (1) pass through /careers/db/1.html
Note that the requested uri is /careers/db/1.html
If I change just the file extension on my request to PHP like so:
Code: [URL]
Then the request uri is totally different now. Here's the rewrite log:
Code:
192.168.1.102 - - [14/Nov/2009:13:47:23 --0800] [192.168.1.2/sid#807df8][rid#8fc850/initial] (2) init rewrite engine with requested uri /Applications/MAMP/htdocs/careers/
192.168.1.102 - - [14/Nov/2009:13:47:23 --0800] [192.168.1.2/sid#807df8][rid#8fc850/initial] (1) pass through /Applications/MAMP/htdocs/careers/
Note that the requested uri now has a full path which does not include the actual filename, /Applications/MAMP/htdocs/careers/
What the heck? More info. If I request [URL], I can actually access p1.php. The requested uri is /careers/db/p1.php. The problem appears to be because the filename starts with a number. I can also request [URL] and get thru to 1.php with requested uri /careers/db//1.php. Does mod_rewrite think /1 refers to a backreference or something? Why can apache handle the html file request properly and not the php file request?
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Jun 26, 2010
1-Can I have the shell command which allows me to have the number of reques ts/seconds under the Apache server?
2-And the number of sons threads in service/wait?
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Apr 1, 2011
On my server I provide OCR file conversion service but the problem is when a user uploads a file and it's being converted then if you open another tab and try to load the site it won't respond until that conversion is completed. In other words until the PHP script finishes execution apace doesn't serve any other request to the same browser.
Here is my apache configuration:
Code:
ServerTokens OS
ServerRoot "/etc/httpd"
PidFile run/httpd.pid
[code]....
You can check what I mean if you try to upload and convert a file and while the file is converting try opening the site in another tab.
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Dec 28, 2010
I've had a VPS running Ubuntu 9.10 x64 server, hosting 3 websites of mine for a few months now. This problem has been happening for a while. Every once in a while, probably every 2 or 3 days, I'll wake up in the morning, and apache won't be responding, no web pages will load. /etc/init.d/apache2 status, reports that apache is functioning properly. Every time I simply have to restart the daemon and things run fine for another few days.
I thought maybe it was a memory issue, so I lowered the MaxClients in the prefork module from 50 to 30 a few days ago, but the same thing is still happening. My VPS has 512MB of ram, burstable to 1GB, and according to Virtuozzo, there was only one night of high traffic where I even came close to that soft limit. I've checked my syslog, and there's absolutely nothing in there about apache. I've checked apache's error.log as well, and there's nothing in there that would indicate a problem either.
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Mar 18, 2010
A Linux (CentOS5.3) server is setup with apache reverse proxy. The reverse proxy server is opened to outside and an internal server is mapped to ProxyPass configuration. SSL certificate is also installed on the Apache reverse proxy server. The problem is, it is extremely slow in serving http requests through reverse proxy. There is no problem with server resources or bandwidth. When the internal server is directly accessed through Internet, there is no delay. The backend server and the reverse proxy server are also on the same switch (same subnet). When I searched the Net, there were recommendations to enable cache in Apache. I did so as follows in httpd.conf.
<IfModule mod_disk_cache.c>
CacheEnable disk /
CacheRoot "/var/cache/mod_proxy"
CacheDirLevels 5
CacheDirLength 3
</IfModule>
But still there is no progress. Do I want to enable cache in ssl.conf too? Or is there any other workaround to speed up Apache reverse proxy. Is there a way to check that caching is happening?
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Dec 5, 2010
I have recently upgraded to a VPS for the purpose of web hosting a group of sites related to my business.The reason for the upgrade was because we wish to run a shopping cart software which required greater memory for PHP and the VPS was the most economic solution. So, I have very basic linux knowledge but I am the definition of a newbie when it comes to going further than just scratching the surface of server configuration! I have successfully hosted our main site for a number of weeks but recently the postfix service stopped sending mail. I have Plesk Control Panel installed and postfix continually shows as not started even though in SSH the service status is definitely running - I have gone through the troubleshooting checklist here (http://www.postfix-book.com/debugging.html#d0e6) but can't get any further than section 2.1 as when running the host command (#host relay-test.mail-abuse.org), I get # -bash: host:command not found. I've gone further in the document but not found any issues...
When postfix was working properly (i.e. sending emails!), the plesk CP showed the service as started and all emails from the website were sending as normal. The mailq command is showing the messages stuck in the mailq and the maillog shows the following:- http://pastebin.centos.org/36446 - these are the latest few pages.To check the configuration and basic elements I have flushed the mailq (which shows a stack of messages waiting) and I have also spent a long time (2 weeks) reading up on the parameters that should be in main.cf and master.cf.I have found that when I 'telnet localhost 25' I get the following response...[root@s15397216]# telnet localhost 25Trying 127.0.0.1...Connected to localhost.Escape character is '^]'.
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Sep 25, 2009
I have opened/added the ports 1812 and 1813 (both tcp & udp) for radius server in the firewall.
when i use the command : telnet localhost 1812 , the connection says "refused", i get the following messages code...
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Dec 23, 2010
if I should ask this in the server section. But since I use the desktop version of Ubuntu I will ask here. Basically my server is going on pension. Hardware is outdated and all that. Since it's main job was serving me with MySql databases with web interfaces I sommer want to shift all of that over to my desktop and run my databases on the desktop. It's only me that access it so don't see why I can't run it localhost.
My question is. The three main things I need, apache, Mysql and php, are they in the repositories in Synaptec ? If not how hard will the install and config of those three apps be on Ubuntu Desktop? (I've always used Fedora as server with everything build-in so have no experience of installing mysql, apache and php from scratch)
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Nov 28, 2010
I have Apache2 running on my server and can serve up pages on that box, but cannot seem to access them from other PCs on the network.
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Jun 28, 2011
I have installed VirtualBox on a MacBook and installed RHEL6 on a guest server ("Orion") in VirtualBox. I am trying to follow the tutorial at xenocafe on Apache Web Server Tutorial for Linux. I've checked a few other websites for port forwarding, and have used VBoxManage to set
Apache/GuestPort" 80
Apache/HostPort" 8888
Apache/Protocol" TCP
[code]...
I am able to ssh into the Virtual Box guest server using:
$ ssh -l rmt1 -p 2222 localhost
I believe this means that the port forwarding works. I am able to start and stop httpd on the guest with no warnings. I retired a problem with DocumentRoot by setting SELinus to disabled. My trouble is that: When I bring up a browser on the host and try localhost 8888 and expect to see my sample html page housed on the guest server (located under root / www), what I get is a spinning wheel.
And when I bring up a browser on the guest and try localhost 80 and expect to see the sample page I made, what I get is the well-known Apache test page. I am stuck in knowing (1) how to cause port 80 output from the guest to be interpreted by the host browser searching port 8888 (Or, Why does ssh into the guest work but http out of the guest not work), and, (2) how to arbitrarily determine the location of what the very first webpage is that will be loaded.
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Jul 5, 2011
I am following this howto to install Apache, MySQL, and PHP5:
[URL]
I have just installed Apache and I am pointing my browser to:
http://192.168.0.100
but I am getting the error message that the server is taking too long to respond.
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Jul 11, 2011
I've installed apache2 on ubuntu 10.04 and everything works fine, but when I use functions that needs to connect to Internet, it doesn't work. Is there a simple setup I've forgot? I've been searching and looking for a solution, but I'm stuck!
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Jan 19, 2011
I've just upgraded my laptop to Fedora 14 and installed LAMP on it for a test environment. I've followed the official instructions to install but seem to have a problem that I didn't have on F13 or Opensuse. Each time I try to access index.php on localhost I get a permission denied message and an SElinux alert. I have tried 7 different solutions on various forums and just can't view anything in a browser.
/var/www/html has been set to chmod 777
/var/www/html/index.php has also been set to chmod 777
A standard user can definitely read and write to the above files/folder. Until I commented it out the Welcome/Test page was working perfectly.
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Aug 6, 2009
Is there a maximum requests per second that CentOS can handle? For example, a site like wikipedia gets at least 30,000 requests per second, so could CentOS handle that many requests? Some people told me that CentOS cannot and i would need to get a custom kernel.
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Sep 7, 2010
explain about Apache fail over by using Heartbeat on CentOS 5. i tried it but it is not working.
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Sep 28, 2009
I have installed the CentOS 5.3 on VMWare. Then I Have Installed Apache ,PHP , Mysql with the flowing Command :
yum install httpd
yum install php
yum install mysql
yum install mysql-server
yum install mysql-devel
yum install php-mysql
Then I tested my Web Server , Data Base server and PHP Whit Create A PHP Page that work to Mysql this Test is successfully. Next I ping my machine IP (192.168.6.131) and then Ping windows xp machine. Even I Ping My Linux machine in Windows XP. But when check the PHP Page Or Local host in Linux machine whit Browser (IE or FF in XP), Response (IE:) Cannot display the webpage or (FF:) The connection was reset.
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May 26, 2011
I just getting back to working with linux. I'm having a problem with what seems to be an iptables thing or something easier than that, Enough here is the question I can get apache to run on the local machine by either going to http://localhost or by the ipaddress on the CentOS machine. But for some reason when I try to take a look on my laptop (on the same network) and try to go to it using the IP address is doesn't go. I can ssh from my laptops but it will not open the apache startup page.
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Nov 15, 2010
i'm setting up apache on 5.3. i can access the apache test page without a problem from the server via URL... But i can't figure out how to access this page from another computer within the domain (for when i upload my home page.
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May 31, 2010
I am planning on installing an Apache server today. I know how to get it to point to addresses like "localhost" or my outside ip, but how do I get it to point to a URL like [URL]? (That's just an example URL)
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Sep 5, 2009
$mysqladmin -u root
just prints out a long option list and quits... sometimes it tells me that I cannot connect to localhost.... I've tried --no_defaults,--socket= etc. as per the MySQL manual.
MySQL 5.0.45 I know the server is running This is a new install and i'm su'd to mysql in mysql homedir. I'm sshing into DV Centos 5.
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