[Spam Control] Locking Down A Server
Jul 13, 2008
I have a (dedicated) server out of control. It is managed by a 3rd party company who has never been able to get the spam and server load under control. Loads average over 5! and there is no activity in top other than sendmail and mailscanner (with Ensim).
I turned off mailscanner and sendmail while I typed this and server load went to .08.
I'm going to switch (dedicated) servers to a new provider (for reasons above plus a few others) which will include managed service from the server provider as well.
There are only a few programs that need to run on this server. VBulletin is the main concern.
I want to lock down all mail access. I want vbulletin to be able to send outgoing email as part of its administration and as part of its member notifications.
I don't want ANYONE OUTSIDE THE SERVER to be able to send mail through this server.
One idea I have had is to use DNS to assign all MX records of every domain on the machine to the free gmail service.
I have one domain on this machine (and important domain) that gets thousands and thousands of spam. I assigned its' MX records to NO-IP.com who filters and forwards email to me. That has worked - but server load never budged.
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May 10, 2007
I don't know why, but the server locks up daily at different times of the day. I have to reboot, flush iptables and it will happen again hours later.
I don't know what to look for, what logs, etc.
I'm confident it is something within iptables
I have apf/bfd installed and dos deflate as well.
How can I trace this?
Nothing suspicious in /tmp either
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Jun 30, 2008
I am running a small hosting operation and would like to know more about SPAM filtering and controlling. SpamAssasin is installed on my server but it does not do much. I was looking into different solution with a anti-spam device and would like to know which one is recommended the most: sonicwall, barracuda or symantec? (total email addresses is less than at thousand)
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Apr 15, 2008
switched to ipower.com and not getting any help - really stuck as my customer wanted better spam filtering so I went to them on a recommendation and I do not know how to turn on and what is the best setting for spam filtering with their panel. Also using HORDE where I can set a filter using rules but it only works if I log on and hit apply filter so my customer still gets it in his in box -
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Mar 31, 2009
How do I lock SSH down to just my IP range and with a key?
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Jun 26, 2009
Ive been having some issues with my cpanel lately... it seems everytime I add an account via whm or a subdomain via cpanel it locks up when "Restarting Apache"
I have 2 identical servers, 1 runs fine... this one though ive reinstalled apache...multiple times with no results... now im reinstalling cpanel and it seems forzen at 50% and just says
Apache ... ... ... ... for about 100 lines.
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Feb 28, 2007
i have question about locking in homedir.. i bought few weeks ago debian box, and i need to create shell accounts with locking axx to user home directory.. or block access to other users directory..
chown 701? jail? how to?
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Mar 2, 2007
[root@server001 root]# iptables --flush
[root@server001 root]# service iptables restart
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: filter mangle nat [ OK ]
Unloading iptables modules: [FAILED]
Applying iptables firewall rules: [ OK ]
As soon as I restarted it, I got locked out again. Disabling iptables enables me back in ssh. What can I do to fix this?
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Dec 18, 2007
a way to lock users in their directory. E.g. if I host a domain mydomain.com, I need that the owner of this domain can access (read, write, execute via ssh) only the folder www/mydomain.com and nothing else. The solution does not to be a ultrasecure one.
1] adjusting privileges (e.g. deny execute on dirs for the "others") seems a sure way to make the server unfunctional
2] rbash - when I set shell to rbash for a test user, the user can no longer connect to server through winscp
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Feb 28, 2008
the load of my server is high,
i login whm and check the CPU/Memory/MySQL Usage
User Domain %CPU %MEM MySQL Processes
mysql 3.30 45.97 0.0
Top Process %CPU 1.0 /usr/sbin/mysqld --basedir/ --datadir/var/lib/mysql --usermysql --pid-file/var/lib/mysql/hostname.com.pid --skip-locking
Top Process %CPU 0.7 /usr/sbin/mysqld --basedir/ --datadir/var/lib/mysql --usermysql --pid-file/var/lib/mysql/hostname.com.pid --skip-locking
Top Process %CPU 0.6 /usr/sbin/mysqld --basedir/ --datadir/var/lib/mysql --usermysql --pid-file/var/lib/mysql/hostname.com.pid --skip-locking
the values are higher before,
i want to ask what is skip-locking and if i add skip-locking in my.cnf,
will the problem been improved? and will it take any effect or problem?
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Feb 6, 2008
I'm running apache to serve PHP files on (/home/www/) and thttpd to serve images on (/home/www/images)
thttpd runs on a different IP than apache, apache only listens to its IP.
After doing this, the number of apache processes decreased significantly, however performance has gone down, and apache is starting to crash very frequently (swapping).
Could there be a file-locking issue? Do I have to separate the images folder from the www folder?
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May 26, 2008
I've seen that a similar topic was posted earlier today, but I have more specific question. I'm looking for the e-mail only hosting. Requirements:
* dedicated IP
* SMTP + SSL (TLS)
* POP3/IMAP + SSL (TLS)
* up to 10 e-mail addresses from various domains
* forwarders (10 or more)
* 1-5 GB storage
* 10 GB bandwidth
* budget: the less the better, but I'll pay any reasonable amount of money if the service is good. Basically I need to find a provider at which I can keep my e-mail address once and for all. (I need a few e-mails only, a few forwarders, 100 MB storage and 1 GB bandwidth but I stated more so I don't run out on resources)
Is there any significant difference between SSL and TLS or is it all mainly in the proprietary vs open standard?
Is there any good reason why not to use Google Apps for this purpose? I've read that some people are concerned about privacy. Is there any pro that can comment on this (privacy issue) and remain objective?
One last (dumb?) question. What is the purpose of domain locking? Before AuthCodes were introduced I could see the reason for locking domains, but why would anyone want to lock the domain these days? (and yet I see majority still does) I mean, noone can initiate the transfer without providing AuthCode (can he?) and isn't that alone good enough to keep the domain safe? And if someone manages to gain control to the control panel to read AuthCode then he can easily unlock the domain so I see no additional layer of security.
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Oct 11, 2007
im in the UK and i am look for a webhost (preferably a reseller) on windows.
i want maximum control over the server (no PLESK).
which control panel would i be looking for?
do webhosts allow the installation of isapi filters in IIS?
my price range would be between £40-50 ($100) p/m
sql server necessary!
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Mar 30, 2008
I am using VPS for my general hosting, but have considered putting together a machine for an email server to host some email accounts that I currently don't have on my VPS accounts and would want tighter security than VPS offers (hosting company/support having access to VPS).
While I have gotten more comfortable with linux during the last 5 months I have been hosting on a VPS, I still prefer a control panel type interface. I am using WHM/Cpanel currently. I know that I cannot get a Cpanel license for the type of server I want to put together, so is there either a linux server distribution with a good gui interface, including email setup and admin, or is there a control panel other than cpanel that is either free or inexpensive to use on a dedicated email server.
I will house this email server on my 6mb/768k DSL line at home, or at work on a 4xT1 (6MBs).
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May 3, 2008
does anyone have any suggestions on selecting a control panel? ive seen some products around $300 that appear to be just enough for what i need.
how long is the typical setup time for a control panel?
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Jan 7, 2007
I am in the process of getting my new colo setup going. My initial colo is on a per server basis so I don't need a switch right away. I am however going to add a switch so I can have my servers connected privately to a backup server in the same rack. On this backup server, what is the best type of "system/control panel" to use to setup the backup accounts for each of my servers? I could just create accounts manually via the Linux command line, but curious if there is a good way to do this (Webmin maybe?). Of course this server will not be accessible from the internet, it will be on the "private" network and accessible from the other servers.
How are those with a similar setup doing this?
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Dec 11, 2008
when I was in vps except cpanel and whm I had another control panel for vps , Don't remember what was that I could turn my server off and on for dedicated server except for cpanel and whm what else do I need?
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Feb 27, 2007
I'm used to setting up the nameserver using a control panel (directadmin)
but how do you do it on a server without a control panel?
So far I figured that you just
set up 2 ip addresses in your registrar to use as nameservers
and then
edit /etc/named.conf and put the path to the zone file and of course set up the zone file /var/named/nameofzonefile.db
then service named restart
are these steps correct? am I missing anything?
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Jun 29, 2009
a good method to have processes controlled in the resources they use, in a shared cpanel environment?
For example, it appears that the cpanel backup (compressed) made the load skyrocket to beyond 60% cpu and 95% memory usage today, and this server is beefy to begin with.
I want some system to kill processes immediately if they exceed X amount of resources or kill processes that spiral out of control (X amount of processes from same user).
I'd like to be alerted of this action as well.
How can I set this up?
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May 6, 2009
My host and I discussed over a month ago the possibility of adding on another server so that I can use one for MySQL and the other for web, and eventually as my sites expand add a third one so that two balance the loads and the one will be dedicated just for MySQL.
Well, it's been a month now and I have had a server dedicated for MySQL and the other one dedicated for web set up. A month has gone by and my host and I are having problems setting it up - I have not been able to use the new server and have already had to pay the bill when I have not been able to use it for its purpose!
The old server was supposed to act as the MySQL while the new server was supposed to be for web. We are having so many problems trying to set this up, well at least my host is, and I am becoming more and more frustrated as the days go on because I am paying for the new server that I can't even use because it's not set up properly.
I am using DirectAdmin control panel and linking them is a pain in the butt. I linked my host to this article, but I don't think he's implementing what is being instructed to do:
[url]
The new server is still not working properly with the MySQL server and I have no idea what to do here. I have already paid for a month's service for no reason and now I am starting to feel robbed because this process is taking so long.
I am willing to switch control panels if it will speed up the process. Does anybody know of any control panels that will be better suited for my need? I'd ideally like to simply manage both servers in one control panel - under one license - and manage each server's services and most importantly the MySQL and it's databases on the dedicated server for MySQL.
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May 17, 2009
I installed Centos4.7, now i am installing the ISPCongif2 but at the last step after configuring the ssl, i was asked to enter my host and domain, but it gives me error the url is not reachable.
The domain is not hosted anywhere but i created an entry for it in the /etc/hosts
[root@serv ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.112.41 serv.mynewdomain.com serv
192.168.112.41 mynewdomain.com
Do i have to make anychanges on any configuration files?
Here are the steps i did to setup this server:
1- I purchased an ip 64.xx.xxx.xxx from my ISP provider.
2- I installed centos4.7 on my PC.
3- Installed the webmin.
4- On the router i pointed the 64.xx.xxx.xxx to 192.168.112.41
what are the steps please i need to follow to get this server running?
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Apr 22, 2009
billing system to control the traffic between router and servers. I thing I need a billing system installed on server with webgui like those used by ISPs but I need it working with paypal and other payment gateways.
The other solution is to use radius server but I will need it working with payment gateways. Can you recommend me a good radiuns server with many options?
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Jul 7, 2008
Whats the best Control Panel for Windows 2003 like cPanel except from thats for Linux but i want a Control Panel for Windows 2003 Web Server. I know their is Plesk & HELM but is their anymore and which is the best one?
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May 3, 2008
please provide me some free control panel like webmin!
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Apr 22, 2008
We have a dedicated server with domains already setup and everything.
The guy who used to run it for us has left and it appears it was all done via SSH and command line - we don't have that level of skills.
Is there a way which we can:
A) install a Control Panel and administer ourselves
B) Migrate all the domains to a new dedicated server with an existing control panel.
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Jun 19, 2008
We may soon get into the unmanaged arena. Recently there has been debates on whether an unmanaged server should come with anything other than a bare OS, even if ordered with a control panel. I'd like to get a feel for what you as a customer expect from an unmanaged host when ordering a server with control panel.
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May 13, 2007
write a tutorial how to set up a server without a control panel. A step by step guide how to set up the dns, add doamins. create accounts, create ftp users, create databases, create db
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Mar 2, 2007
what my options are for a free control panel that is operable on windows server 2003.
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Oct 9, 2009
What's your favorite control panel for installing in a VPS/cloud server?
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Jun 29, 2012
after upgrading to plesk 11 i get this error (Image attached)
so basicaly i cant do nothing..
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Aug 21, 2014
I have server with the Plesk control panel on Linux server and want to install ffmpeg but not sure about the steps to install it. Any script or easy steps to install ffmpeg on my server.
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