Security is not a product, but a process.

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11
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2answers
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How does the updated Shellshock vulnerability test for CVE-2014-7169 work?

I understand the original test for CVE-2014-6271, which was: $ env x='() { :;}; echo vulnerable' bash -c "echo this is a test" But I'm confused by the updated test and corresponding output for ...
11
votes
3answers
890 views

Finding how a hacked server was hacked

I was just browsing through the site and found this question: My server's been hacked EMERGENCY. Basically the question says: My server has been hacked. What should I do? The best answer is ...
11
votes
5answers
16k views

A secure, standard iptables rule-set for a basic HTTP(s) webserver

I have been trying to put together a basic server iptables script that will work for most sites just running a basic webserver using HTTP(S) and SSH (ports 80, 443, & 22). After all, most VPS only ...
11
votes
3answers
6k views

How do I setup sshd on Mac OS X to only allow key-based authentication?

I have a Mac OS X machine (Mac mini running 10.5) with Remote Login enabled. I want to open the sshd port to the Internet to be able to login remotely. For security reasons I want to disable remote ...
11
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4answers
4k views

How to manage a web servers SSL private key protection (password vs. no password)?

We have a discussion in my company's security group about what's the worse of the following options to manage SSL private key. The web server needs access to the private key for the encryption ...
11
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6answers
18k views

Securing a SuperMicro IPMI BMC

I've recently acquired a SuperMicro X8DTU-F motherboard, which has a built-in BMC, which basically runs the IPMI system. It turns out to be a small Linux system running on an ARM processor. ...
11
votes
3answers
8k views

Is there a windows equivalent to chroot?

On a *nix system I can use a chroot to isolate 2 processes from each other and from the rest of the system. Is there any similar security system under windows? Or is there any way to prevent 2 ...
11
votes
1answer
3k views

Enable blowfish-based hash support for crypt

How do I enable crypt_blowfish support for shadowed passwords and PHP on a Linux (Debian) server? I'm referring to the OpenBSD-style Blowfish-based bcrypt, known in PHP as CRYPT_BLOWFISH. As far as ...
11
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1answer
267 views

What do the OS X authorization mechanisms actually do?

Background  I'm trying to glean a better understanding of the OS X login process, in order to decide the best way for achieving VPN Single Sign On. Please do correct me if I'm wrong, but I believe ...
10
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10answers
1k views

Pull network or power? (for contianing a rooted server)

When a server gets rooted (e.g. a situation like this), one of the first things that you may decide to do is containment. Some security specialists advise not to enter remediation immediately and to ...
10
votes
7answers
13k views

How to log every linux command to a logserver

I want every single command typed to go to a logserver. Already configured is the syslog-ng to send all logs to the logserver. I'm interested in any and all methods to do this. I would expect ...
10
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4answers
717 views

Updating Malware cleaning skills

I have seen some sites offering 'Malware University', training classes on getting rid of malware. Do you think that updating your malware removal skills (or arsenal) is necessary from time to time? ...
10
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11answers
5k views

Server room door security

I wanted to know if anybody had any recommendations as to how to keep the server room secure from employees. There is a lock on the door, however, anybody with a building master (maintenance, owners, ...
10
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5answers
4k views

How did Matasano get hacked?

from: http://seclists.org/fulldisclosure/2009/Jul/0388.html If I understand it best from the posts from: http://news.ycombinator.com/item?id=723798 the Matasano guys left sshd internet accessible - ...
10
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9answers
4k views

Multiple *NIX Accounts with Identical UID

I am curious whether there is a standard expected behavior and whether it is considered bad practice when creating more than one account on Linux/Unix that have the same UID. I've done some testing on ...
10
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6answers
3k views

How do I effectively destroy a SSD? [duplicate]

What is a repeatable way of destroying SSDs? For example, if i opened it which part could i take out and destroy for just the data(How to identify the actual "storage unit")? Case 1. Normal user that ...
10
votes
3answers
5k views

Why does traceroute fail for amazon.com, yahoo.com, and ebay.com?

While troubleshooting performance issues on our network, I ran traceroute on various websites. The following websites would repeatedly not complete traceroute: yahoo.com amazon.com ebay.com ...
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2answers
2k views

linux command to prevent dos attack by using netstat and iptables

I want to DROP more than 200 requests per ip to prevent ddos attack. this is command that i used to detect requests count per ip : netstat -alpn | grep :80 | awk '{print $5}' |awk -F: '{print ...
10
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5answers
2k views

Why we need SELinux?

I could not get much idea where the SELinux has been used and what it saves from attacker. I have gone through SELinux web site and read the basic but still not getting clue about SELinux. For the ...
10
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7answers
605 views

Career shift to security - learning tracks? [closed]

I've had to learn enough to be dangerous (if only to myself), managing the firewalls, switches, etc for small networks over the past ten years. However, I know there's a pretty massive gap between ...
10
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7answers
475 views

Where to maintain central source repository?

What is the industry best practice regarding securing access to source code? I am thinking SSL only connections via apache allowed over to our server on an obscure port that doesn't conflict with ...
10
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2answers
7k views

Is a central location for authorized_keys a good idea?

I'm in the process of configuring a cloud server to run the following stack: Ruby, Passenger, Apache; under Ubuntu 10.04 (Lucid Lynx). In the process of wanting to make the server easier to manage I ...
10
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6answers
12k views

What is the best way to find Conficker infected PCs in company networks remotely?

What is the best way remotely to find Conficker infected PCs in company/ISP networks?
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4answers
3k views

Securing file system for secure SFTP server

This might not seem as a development question, but in essence it is. Let me explain how. Our main development focus is dynamic content pages. Some of our customers have asked us to allow them space ...
10
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7answers
25k views

Is using integrated security (SSPI) for accessing SQL Server better for web applications?

When deploying web applications (.net) to a production environment, is it better to use integrated security or does it even matter? It seems to me that if a hacker breaks the web server, it won't ...
10
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2answers
4k views

Can someone please explain Windows Service Principle Names (SPNs) without oversimplifying?

I have wrestled with service principle names a few times now and the Microsoft explanation is just not sufficient. I am configuring an IIS application to work on our domain and it looks like some of ...
10
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3answers
1k views

Security considerations of WPA versus WPA2?

As we replacing our existing WEP infrastructure across multiple offices, we are weighing the value of upgrading to WPA versus WPA2 (both PSK). We have several different types of devices that do not ...
10
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8answers
4k views

Best file system for external (USB) hard drives/USB memory media

Almost all external USB hard drive and USB memory media/sticks come today preformatted with FAT32. As far as I know the only advantage of the file system is the compatibility among OSes and devices. ...
10
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5answers
605 views

Tips to gracefully take over a (UNIX) production server

After months of neglect, e-mail flames and management battles our current sysadmin was fired and handed over "the server credentials" to me. Such credentials consist in a root password and nothing ...
10
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7answers
2k views

What are the pros/cons of blocking a program from running in %appdata%, %temp%, etc.?

While researching ways to prevent CryptoLocker, I saw a forum post that advised using Group Policy Objects (GPO) and/or antivirus software to block run access in the following locations: %appdata% ...
10
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5answers
1k views

Prevent execution of Windows executables

Is there any way to tell Windows (XP and above) not to execute files (*.exe files), which are present in drives/folders other than certain folders, that I mention? In short I want executables from ...
10
votes
6answers
20k views

How to check that an OpenVPN server is listening on a remote port without using OpenVPN client?

I need to check that an OpenVPN (UDP) server is up and accessible on a given host:port. I only have a plain Windows XP computer with no OpenVPN client (and no chance to install it) and no keys needed ...
10
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3answers
18k views

What is muieblackcat?

I've recently installed ELMAH on a small .NET MVC site and I keep receiving error reports System.Web.HttpException: A public action method 'muieblackcat' was not found on controller... This is ...
10
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3answers
372 views

piping a password and security

I sometimes do echo "secret" | mysql -u root -p .... Now I'm concerend about security here: can someone listing all processes see the password? To check I tried with echo "test" | sleep 1000 and the ...
10
votes
2answers
253 views

Should the virtualization host be allowed to run any service?

I recently setup a virtualization server for the small company I'm running. This server runs few virtual machines that are used for development, testing, etc... My business partner works from a ...
10
votes
2answers
14k views

How to check if a RSA public / private key pair matched

I have two files, id_rsa and id_rsa.pub, what command can be used to validate if they are the valid pair.
10
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3answers
12k views

How to set up my own full-featured certificate authority?

I'd like to set up a certificate authority, which I can then import to all the company's browsers and systems to get rid of all those nasty client warnings when using HTTPS or SSL.
10
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4answers
587 views

Common PHP setup insecurity?

I work with the systems administration at a university and just stumbled across something which is probably common, but was quite a shock to me. All public_html directories and web areas are stored ...
10
votes
5answers
10k views

What steps should I take to secure Tomcat 6.x?

I am in the process of setting up an new Tomcat deployment, and want it to be as secure as possible. I have created a 'jakarta' user and have jsvc running Tomcat as a daemon. Any tips on directory ...
10
votes
6answers
344 views

What are the attack vectors for passwords sent over http?

I am trying to convince a customer to pay for SSL for a web site that requires login. I want to make sure I correctly understand the major scenarios in which someone can see the passwords that are ...
10
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3answers
6k views

Are Amazon EC2 Private IPs reachable from any instance running in EC2?

After searching previous questions here, the general consensus seems to be if an instance that I own is assigned a private IP of 10.208.34.55, that only OTHER INSTANCES I OWN can reach it at that ...
10
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1answer
14k views

How can I restrict the java plugin to run only on certain sites in Internet Explorer?

I want to secure our centrally managed computers better and it is very difficult to automatically deploy the java runtime, but how to do that is another question. I find the security of Java ...
10
votes
3answers
1k views

Is it a good idea to use cacert SSL certificates instead of self signed one in production?

At work, I have a bunch of web interfaces that use plain http or self signed certificates (load balancer management interface, internal wiki, cacti, ...). None is reachable from outside specific ...
10
votes
3answers
1k views

Website defaced, what can I do?

My company's website has been defaced, provided I have the apache raw access log, is there anything I could do to analyze when and what went wrong? I mean what to look out for among all those ...
10
votes
2answers
10k views

User per virtual host in Nginx

Is it possible in nginx configure different user per virtual host? Something like server { user myprojectuser myprojectgroup; ... }
10
votes
2answers
5k views

My linux server was hacked. How do I find out how and when it was done?

I have a home server running a desktop ubuntu distribution. I found this in my crontab * * * * * /home/username/ /.access.log/y2kupdate >/dev/null 2>&1 and when looking in that directory ...
10
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5answers
287 views

My site was recently attacked. What do I do?

This is a first for me. One of the sites I run was recently attacked. Not at all an intelligent attack - pure brute force - hit every page and every non-page with every extension possible. Posted ...
10
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2answers
960 views

Does Debian 6.0 (Squeeze) have buffer overflow protection mechanisms?

My question is: Which buffer overflow / stack smashing defenses (if any) are enabled by default in Debian 6.0 (Squeeze)? Ubuntu has a handy summary table showing the main security features of each ...
10
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6answers
1k views

How to choose a cloud service for backups

I am thinking of using a cloud service to backup one of my client's website. My (clients) main concerns are (in decreasing order of importance) Protection of IP (trade secrets, source code), user ...
10
votes
1answer
306 views

How do we instruct our employees to protect themselves from Heartbleed? [duplicate]

Welcome to the world after heartbleed. We've patched our servers and are replacing our SSL certificates. But just because our servers are fixed, that doesn't mean that the rest of the internet is ...