Security is not a product, but a process.

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13
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2answers
22k views

Troubleshooting Windows Authentication problems (no challenge) in IIS 7.5?

I know that there are thousands of reports of people having trouble getting Integrated Windows Authentication to work with IIS, but they all seem to lead to web pages that don't apply or solutions ...
13
votes
2answers
1k views

Has anyone got billed for malicious activities (DDoS) on a cloud server?

I would like to know if anyone got billed beyond expectation on a cloud service because of malicious activities (DDoS, etc)? How does EC2 and/or Rackspace Cloud handle these issues? Thank you!
13
votes
4answers
868 views

Reliable software keylogger detection?

I may be dreaming here, But is there a reliable method for keylogger software detection? I'm primarily a developer but I run a couple servers and the thing that worries me most is a software ...
12
votes
13answers
2k views

Is it ethical to hack real systems? [closed]

Is it ethical to hack real systems owned by someone else? Not for profit, but to test your security knowledge and learn something new. I talk only about hacks, which does not make any damage to ...
12
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14answers
1k views

Sysadmin bad habits

I think it would be interesting to have a list of bad habits you observe related to system administration. For example: Always using root on servers Sharing account passwords Inserting passwords on ...
12
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23answers
1k views

Is being paranoid a required 'quality' for Sys/Net administrators?

Is being Paranoid considered an (unspoken) 'requirement' for a Sys/Net admin to have (obviously for security reasons)? Is there such a thing as being overly paranoid?, or should we be trustful of ...
12
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6answers
5k views

How would you send syslog *securely* over the public Internet?

So I've got a few servers which I'd like to log centrally but obviously I don't want to pass the data insecurely over the internet. I've tried syslog-ng but can't make it work in a secure way, a ...
12
votes
8answers
1k views

is this a hack attempt?

Looking through my 404 logs I noticed the following two URLs, both of which occurred once: /library.php=../../../../../../../../../../../../../../../../../../../../../../../../proc/self/environ and ...
12
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13answers
3k views

Password expiration policies [closed]

Having just received an email from a supplier informing us that they would be forcing us to change our password every six months, I'm curious to see what password expiration policies people use and ...
12
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9answers
5k views

SSH server zero-day exploit - Suggestions to protect ourselves

According to the Internet Storm Center, there seems to be a SSH zero-day exploit out there. There is some proof of concept code in here and some reference: ...
12
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2answers
780 views

What is the difference between securing a linux box using hosts.[allow|deny] vs iptables?

As the title states, I have a linux box. As far as I can tell I can use hosts.allow / hosts.deny or iptables to secure. What's the difference? Is there another mechanism that can be used?
12
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3answers
4k views

How to disable swap files in ESXi?

We are running a few Solaris / Linux VMs on ESXi that contain very sensitive encrypted data that eventually get decrypted as required in memory. Everything is fine, except for the ESXi swap files ...
12
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6answers
8k views

Automatically check for Security Updates on CentOS or Scientific Linux?

We have machines running RedHat-based distros such as CentOS or Scientific Linux. We want the systems to automatically notify us if there are any known vulnerabilities to the installed packages. ...
12
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5answers
18k views

How to enable TLS 1.1 and 1.2 with OpenSSL and Apache

In light of a growing number of security issues, such as the newly announced Browser Exploit Against SSL/TLS (BEAST), I was curious how we could go about enabling TLS 1.1 and 1.2 with OpenSSL and ...
12
votes
2answers
569 views

How to Isolate PCI Compliance

We currently process, but do not store, credit card data. We authorize the cards via a self developed application using the authorize.net API. If possible, we would like to limit all requirements of ...
12
votes
3answers
989 views

Server credential management for Linux and Windows

We are a relatively small shop (as far as number of sysadmins) with a mix of RHEL, Solaris, Windows 2003 and Windows 2008 servers; about 200 servers in all. For our administrator accounts (root in ...
12
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5answers
1k views

Reviewing firewall rules

I need to review firewall rules of a CheckPoint firewall for a customer (with 200+ rules). I have used FWDoc in the past to extract the rules and convert them to other formats but there was some ...
12
votes
3answers
702 views

Access control: Windows vs Linux

I'm reading MIT 6.893 lectures on which it says protection in Unix is a mess, no underlying principle, and it also points out that Windows has better alternatives, which can pass privileges from one ...
12
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3answers
3k views

SELinux vs. AppArmor vs. grsecurity

I have to set up a server that should be as secure as possible. Which security enhancement would you use and why, SELinux, AppArmor or grsecurity? Can you give me some tips, hints, pros/cons for those ...
11
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11answers
1k views

Site hacked, looking for security advice [duplicate]

Possible Duplicate: My server's been hacked EMERGENCY Last weekend my company's site was hacked. They did the nicest thing of doing that on a Friday evening so we only noticed the ...
11
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12answers
5k views

what's a secure way to send passwords over the internet?

I'm looking for the best way to send passwords over the internet safely. Options I've looked at are PGP and encrypted RAR files. There are no real parameters other than getting from point a to point ...
11
votes
8answers
3k views

How can I download an executable file inside the company network when it's been locked down?

This might seem like a silly (or nefarious) question at first glance, but allow me to elaborate... We have implemented all sorts of measures on the company network and proxy to prevent the download ...
11
votes
4answers
1k views

Git commit auditing

I have a git server running over ssh and each user has a unix account on the system. Given that two users have access to a repo, how can I be sure which user performed which commit, since the commit ...
11
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4answers
1k views

How do I deal with the removal/eradication of an unknown worm on our network?

TL;DR I'm pretty sure our small network has been infected by some sort of worm/virus. It seems to only be afflicting our Windows XP machines, however. Windows 7 machines and Linux (well, yea) ...
11
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5answers
8k views

Security of PPTP vs IPSec

Is PPTP or IPSEC VPN more secure than the other for 'dial in' VPN, if so, why?
11
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3answers
30k views

Iptables: How to allow only one ip through specific port?

How can I on my ubuntu server, in Iptables only allow one IP adress on a specific port? Thanks
11
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3answers
5k views

Any reason not to enable DoS Defense in my router?

I recently found a DoS Defense setting in my DrayTek Vigor 2830 router, which is disabled as default. I'm running a very small server on this network and I take it very serious to have the server up ...
11
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10answers
4k views

Are there any good reasons for disabling hardware-assisted virtualization?

We've had a number of servers from Dell recently, all of which have had hardware-assisted virtualization disabled in the BIOS. As far as I know hardware-assisted virtualization is a good thing - so ...
11
votes
3answers
312 views

Suspected server or data vulnerability and reporting a fraud site

Our business is YouGotaGift.com, an online store for gift cards, two days ago someone created a website that's called YoGotaGift.com (You is missing the u), and sent a mail campaign to many people ...
11
votes
6answers
2k views

Does disabling root login enhance security?

I have recently found an argument against disabling a root user login in Linux at http://archives.neohapsis.com/archives/openbsd/2005-03/2878.html I assume that, if everybody uses a public key ...
11
votes
2answers
504 views

What to do when someone logged as root on my server

I have a server running Debian 6.0 with logcheck installed. Yesterday ago, I received this message: Jan 19 19:15:10 hostname sshd[28397]: Authentication tried for root with correct key but not from a ...
11
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11answers
1k views

Penetration Testing

We're deploying a new website, hosted ourselves. Short of getting in white hats how would you go about penetration testing from outside the network?
11
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7answers
2k views

Storing rarely used single-purpose passwords

How do you handle the storage of passwords that, by nature of their usage, you can't expect administrators to memorize? Such as: Administrator/root password when everyone logs on using their own ...
11
votes
8answers
287 views

What is the first thing you do if your website was hacked?

What would you do as first thing if your website was hacked? Taking the site from net? or rollback a backup? not realy or? Did you made any experiences in this way?
11
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2answers
6k views

Anything Close to an NSA Guide for Securing RHEL 6

Some in our infrastructure group want to upgrade to start taking advantage of the new features in RHEL 6. In the past, I have relied on the NSA Guide ...
11
votes
2answers
7k 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
303 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 ...
11
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2answers
2k views

The Story of secure user-authentication in squid

once upon a time, there was a beautiful warm virtual-jungle in south america, and a squid server lived there. here is an perceptual image of the network: <the Internet> ...
10
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17answers
1k views

What are the arguments for and against a network policy where the sys admin knows users passwords?

I'd like to know pros and cons.. reasons for and against the idea of sys admin’s maintaining user account lists with passwords.. and additionally not allowing those users to change their passwords. I ...
10
votes
5answers
3k views

Does Linux really need Anti-Virus (other than hosted file scanning)

A large company is doing a review of our software before they will use the web software built by our start-up company. We are using Linux to host, which is properly secured and hardened. The ...
10
votes
7answers
11k 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
votes
4answers
697 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
votes
11answers
4k 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
votes
7answers
614 views

What is required for developers to run their own VM server in an enterprise environment

This scenario was also posted on SO, with different questions for different audiences - and I'm very glad I did as I've received some very good responses. We are attempting to implement a development ...
10
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9answers
3k 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
votes
3answers
4k 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 ...
10
votes
6answers
2k 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
9answers
7k views

How to secure a public facing Remote Desktop Server?

I am looking at needing to expose my Remote Desktop Server (Terminal Services) to be accessed from outside our network. Right now, it can only be accessed from inside our network. I know it's easy ...
10
votes
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 ...