I have a cPanel dedicated server and have a lot of spam attacks on this server. It's getting so bad that our IP is being added to Yahoo & AOL blacklists and my emails are bouncing to these accounts.
Is there anyone on here who can do a thourough check on our server and install anything necessary to stop this kind of activity?
How I can secure my server from vulnerabilities and threats and ddos attack? How can I find my server is compromised or hacked?
Which ports I should check, what commands I should fired on shell prompt? which softwares you will recommend.
my VPS provider just rebuilt my VPS after many hack attacks.
From some days I am getting emails from firewall that someone login to my VPS/mySQL using SSH.
I don't know what they do, but they don't disturb any account. Only some downtime feel during this. But last night my VPS stop working so my provider rebuilt VPS.
how I can secure my VPS now. I have Cpanel installed.
How to best secure WP from any attacks, hack attempts and others?
View 4 Replies View RelatedThis afternoon I noticed a pattern of spam on several different shared hosting servers, spanning several different shared hosting providers.
The spam first takes the client's domain name, for example, plastic.com. Then adds the word "nac" to the beginning, and "gaf" to the end, making the from email address nacplasticgaf@plastic.com . If the domain were rockin.com, the email would be nacrockingaf@rockin.com . Byob.com, nacbyobgaf@byob.com, etc.
It then grabs the ip address of the website, and creates a fake header which makes the email appear to have been sent from that server.
Could some of you run this command on your servers, and let me know if anything turns up? Thanks.
grep nac /var/log/exim_mainlog | grep gaf
You could help us out by running this command:
grep nac /var/log/exim_mainlog | grep gaf > /usr/local/apache/htdocs/nacgaf.txt
then send us a link to [url]
These commands only work on cpanel machines. You'll have to manipulate the path in the commands to the logs that your MTA keeps.
I can see lot of MSSQL Server attacks. In event viewer "Login failed for user 'sa'. [CLIENT: Some IP]"
Most of the attack coming from Chaina. Tipically what I'm doing manually is get that entire IP range and block from Windows Firewall level.
Now I have plenty of blocked IP ranges all over the world.
What would be the best way to avoid from those kind of attacks ?
there are some game types out there that are not protected from any type of udp flood attack. I have been doing a lot of work (my servers are linux) and blocked this by coding a bash script running every second checking tcpdump for the amount of current UDP connections and blocks the ip witch has more than a certain number of current UDP connections. This works perfeclty, but it firewalls the ip AFTER the attack started.
I am really interested into blocking this attack fully. Limiting the number of current connections (UDP) from an ip to a certain amount to block this attack totally. I have been looking around a lot and have had no luck. From what I have found, there is no way to do this with iptables or ipchains. It is possible for TCP though, but I could not find it for UDP. Could anyone help me out here.
Just to let you know, I do run a firewall, but it would never pick up this type of attack unless it was major. This is more like a game type bug (firewall thinks the packets are fine, player packets going to the game server).
i am getting hundreds of theses in my mail log each day, trying different names etc and want to put a stop to them and auto ban the ips.
I have APF
I have few scripts, but hackers again upload at some way c99, and hack some SMF forums at server. Server like server they cannot hack, but user account they can. So please tell me what you advice?
View 6 Replies View Relatedi have question about securety of our DNS Server.
View 8 Replies View RelatedMy server hacked!
my server hacked for tow time in less than one month (both times they were similar to each other), and my previous securing company work on my server in previous hack but the server hack again!
anybody can work on my server? this is very URGENT because my server and all of our sites are down!
so while we all obsess over hardening our servers against sophisticated hacking attempts, how many of us consider the security of our own host's control panel?
Just today i'd forgotten my login for my host's helpdesk. I couldn't find their password recovery form, so i opened their public support chat and asked support for a link to their password recovery form. Apparently they didn't have a password recovery form. Here is the chat transcript:
Support: Hello
Tom: Hi, where is your password recovery form for the helpdesk?
Support: How may i help you?
Tom: Did you see my message?
Support: Yes
Support: Let me know your email address
Tom: [REMOVED]
Support: Okay Let me check
Support: Your new password is [REMOVED]
So, the only think really stopping someone from logging into my helpdesk and posting a server cancellation ticket is a little bit of research to find my email address and a traceroute to find my host.
I see that one of the most important things nowadays is the security of our servers.
I would like to know from people here that are running big and small servers what they have done to secure their servers. What tips, what softwares they have used, which applications using and are more secure than others.. generally everything that could make good in the protection and security of our servers.
Even if you asked helped from a company doing that work, what changes they have done to your servers? which options they changed?
I am making this thread so as to collect all info we know in one place.. One knows about that tip.. the other one knows another tip.. having all of them somewhere could make a tremendous difference..
Moderators please dont move that thread in any software discussion or other forum as this is one of the most active ones and also has instant relation with the dedicated servers we buy.
I have a friend that works in the IT. He is about to start his own business, something in the line of network connection or something like that. I was telling him that I'm planning on getting my own dedicated server but that I have no idea how to secure the server. He told me that most linux desitributions come with their own build in firewall and that I don't need to worry about security. He told me to just ask my dedicated server provider to make sure the firewall is enabled and that's it. When he told me that I thought to myself, either this guy has no idea what he's talking about, or those guys at Webhostingtalk have no idea what they are talking about!
View 14 Replies View RelatedWhich is the best company to secure my web server?
View 8 Replies View RelatedIs anyone have a ebook or article about secure linux server and apache .
I want to secure own server and my vps customer
my linux system : Centos
also i have cpanel control panel
i want to secure my server that scanner tools can not scan my site . because of one of my site is very important to do not scan of folder.
my server os : linux Centos 5
I have a unmanaged server, and i want to have it secure harden.. how do i do it?
View 5 Replies View RelatedI would like to know if it's possible to secure a server used only for streaming.
Here is what I have on my server :
- Gentoo,
- FlashMedia Server,
- and the following services are enabled : ftp, ssh, named and web ssl
Is it possible for instance to install Mod_security?
I came across this very detailed step-by-step tutorial on how to secure a Plesk based VPS. It's up-to-date and was just written so the info is accurate.
Here's the link to the full tutorial: ...
For hosting irc and shells i heard that the best choice for OS is the FreeBSD..
I would like to know if there are any toturials or if someone can write one.. (or give some tips) of how can i secure a machine running FreeBSD and used for irc + shells!
For example how can i install a firewall, a rootkit etc etc..
Also what about putting users at jail? (not allowing them see other dirs except theirs) how can i do that?
Also what about dont allow users use some commands like dmesg, ping, traceroute, and also how can i make them when they do ps -aux to only see their processes (to not be able see the other processes from other users..)
I'm thinking about creating a limited platform for my employees to access my hosting servers
I wish they can create certain types of directories for users, set permissions on some directories, list users accounts, etc.
but although I don't think they would want to abuse this kind of access, I not only like the Trust-No-One premisse, but I also find it not very unlikely that the computer they're using get compromised or something like that
so I'd like to get technical ideas on how to develop this system and to know if anyone is interested and would like to contribute to the code
what I've considered so far is that I should either create a special user for that which would be on all users group, or should give it "root" access... the latter seems more reasonable for me considering the implementation and compatibility between systems and control panels
but with "root" access I mean "running MY INTERFACE to the employee as root"... this interface would have limited options like "create directory for user X", "list content of user X", etc. (taking a lot of care on input validation)... and would enforce some limits to prevent abuse (for example, can't list the content of more than 10 users per hour, or something like that... and alert me)
my main doubt is how you think that should be implemented? as a special server or as a webservice? with webservice I have the advantage of being capable of using SSL in a simple way and I don't need a special client (since any browser is a client)
then that could be PHP or Perl... but running as UID 0 (I don't even know if apache allows that, or if there's a workaround like SUID)
I`m going to use FTPS for one of my accounts on a cPanel Server.
Should I assign a dedicated IP to that account, then install SSL on FTP.DOMAIN.COM?
I am seeking a little input from others who use multi-CPU machines with large memory as web servers and mysql servers.
I will be more than happy to give additional information I might have overlooked if you need it. Just ask.
We are starting to run more and more dedicated hosts running joomla applications. I've been trying to find the very best settings for both performance and security that I can for the servers to function well specifically with their joomla applications.
Serves are not used for *anything* else at all.
The servers are strictly used to serve up web pages. No need for anything other than what apache/php, joomla requires and a few other things such as ffmpeg, etc.
I would like to remove all tools which aren't needed for such a server, leaving a bare minimum server which is less susceptible to hacking.
I've never messed with the root account so wonder if I can simply not allow any access as root other than terminal, perhaps not even su by giving another account full root access and of course, while allowing the system to continue to function properly with the many things which must run as root.
I would like to do this on all of my public machines which are of course behind firewalls. I also have load balancers and cache devices in front of the web servers but at this time, they are not activated so aren't in the realm of this question.
Development is done in a separate environment and the data is pushed to the web server via private network to the web servers. This means no need for shared tools, FTP, or anything else which users would need in a shared environment.
The servers are 8-way IBM, running linux and apache, php/APC.
Servers have 32GB of memory and I can install up to 64GB.
Databases are run on separate machines which are also dedicated only to running mysql databases. Same machines as above.
Machines all run multiple network cards bonded as a single IP.
So, my questions are;
How can I best utilize my hardware to take advantage of their memory capacities.
For example, on the web servers, I'd like to find the best settings for httpd.conf which takes advantage of the machines resources.
On MySQL servers, I'd like to do the same as the above, taking the best advantage of the hardware/memory.
For web serving and for joomla, I seek the very best security settings I can possibly get. I say best because since they aren't used by users, there is no need to have a lot of tools and access to these machines so it should not be a problem to tighten these machines up a great deal.
Any input from those who have such experiences would be very welcome as I've been finding no one place for help on this.
I have a small reseller account but all the domains are managed by myself. Security has not been a problem because the sites are simple, but now I have a need to deliver and recieve private files. I know how to keep the website itself secure writing my own sessions, using explicit variables, storing sensitive data outside of the web directories and that sort of stuff but it is my 'neighbors' that bother me. If one of them gets hacked or I get a bad neighbor sharing the server I do not want them to have access to my files and passwords.
A few years ago I wrote a browsing script that I found out had the ability to escape my own area and roam freely around every area on the server with unlimited access to every file. When I complained about it, the server admin said that I had nothing to worry about. When I pressed the issue I was told that nobody could invade my files because it was against the rules to go into other people's account. It turned out most server administrators left things open to eliminate scripting problems for their users and there was really no way to lock down a server without breaking a lot of scripts. At the time I moved to a more secure server but they eventually opened things up because of too many complaints and help requests.
Have things changed? Have they worked out the issues with shared servers? Is there a way to tell if my host has implemented proper safeguards (if any viable ones exist)?
what software You Used for securing your windows server.
How Can I Securing My server from All DDOS Attack and All remote hacking?
What kind of software you Used to protect your windows server?
i have vps and i enable the safe_mode , but now i need to turn it off becouse i need to install image uploader script and this script need safe mode off to work
so,
what can i do to secure my server while i turn off my safe mode?
what can happend if i turn off safe mode?
what is the job of safe mode?
how to secure a windows and a linux server used for shared hosting?
View 0 Replies View Relatedwhere we can read over tutorials on how to secure/optimise windows server?
View 5 Replies View Related