Security is not a product, but a process.

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2
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2answers
5k views

ntrights equivalent/replacement for Server 2008

Does anyone know what or if there exists a replacement utility for the Server 2000/Server 2003 command line tool ntrights on Server 2008? More info on this utility (for those that don't know what it ...
2
votes
6answers
11k views

Why does everybody recommend Dban over more fundamental methods?

When people ask on how to wipe a drive, it almost seems as if the default answer is DBAN and I am not really sure why. Especially when doing commands like dd if=/dev/zero of=/dev/sda dd ...
2
votes
6answers
2k views

Preventing users from running certain programs

Is it possible to prevent users from running certain programs on their Linux computers? Is there a whitelist method? A blacklist?
1
vote
4answers
1k views

Securing a guest VM to give it internet access, but block access to host LAN

I have a Linux guest VM running under a Windows host. If I set the networking mode to NAT, the guest can get internet access (which I want), but can also access the hosts LAN (which I dont). For ...
1
vote
1answer
1k views

what would be a better practice instead of chmod g+r /etc/shadow so I can use Unix user/group database for Jenkins authentication?

I don't want to run Jenkins as root, nor giving public access (or even group access) to /etc/shadow seems to a good idea. as suggested by "Manage Jenkins" when selecting Linux user/group database: ...
1
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3answers
1k views

Spam in Apache access logs

I just booted a new, mint Debian Squeeze x64 server from my cloud hosting provider. I received by root password by email, logged in and ran the following commands: apt-get update apt-get upgrade ...
1
vote
2answers
5k views

How to fix “TCP/IP Sequence Prediction Blind Reset Spoofing DoS”

Just finished a Nessus scan and the only thing that came back was "TCP/IP Sequence Prediction Blind Reset Spoofing DoS" - It may be possible to send spoofed RST packets to the remote system. ...
1
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3answers
257 views

Reporting Penetration Attempts to My Server

I need a log file of penetration attempts to my server. Ideally, this log should contain all attempts including logins, HTTPD activities, FTP activities, NFS, and other conventional open ports. ...
1
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2answers
2k views

Logwatch: Ignore certain IPs for SSH & PAM checks?

I have a CentOS 5.6 system, which runs Logwatch. If I perform a security scan (Nessus) against this host, it produces unnecessary noise in the Logwatch output. I'd like to run these security scans ...
1
vote
1answer
912 views

Linux-KVM / iptables: prevent guest spoofing by matching ip+mac address on bridge?

I have my KVM guests on a standard br0 bridge setup: auto br0 iface br0 inet static address 192.168.1.117 netmask 255.255.255.0 network 192.168.1.1 broadcast 192.168.1.225 gateway ...
1
vote
1answer
1k views

SQL Server 2005 Accidentally removed a user from public role, can't add user back into role

I'm trying to crearte a DB user account that only has access to a specific database, and can't read or change other databases, and can't alter credentials for any other accounts. I accidentally ...
1
vote
1answer
192 views

What do I need to do to prevent exploitation of my postfix server?

I have a a web server that needs to send emails, but not recieve them. I have installed postfix (it came with nagios, also installed on this server) and now I need to make sure that my server does ...
1
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2answers
1k views

Best way to use large IP blacklist to deny access to a Windows 2008 web server?

Basically, I'm looking for a solution similar to the ones mentioned in a similar (but Linux-focussed thread) located here so that I can deny access to blacklisted IPs. I am specifically focussed on ...
1
vote
2answers
168 views

How to generate keys for clients whilst keeping ca.key safe

I'm setting up a small vpn service for 10 - 100 expats so they can access normally blocked sites. I would like them to be able to sign up via my website, which upon payment the site will generate ...
1
vote
8answers
954 views

Turning off FTP

I'm setting up a new debian server and I don't need FTP so I want to remove it. According to netstat -tap, ftp isn't listening on anything. However when I do a port scan (nmap) externally it says the ...
0
votes
2answers
73 views

IPtables - Sensible and non-contradictory rules?

This is my IPtable rules for my webserver with SSH installed, i've had help to get this far. My question is, are my rules contradictory. For example, I've been recommended to use these two lines: # ...
0
votes
2answers
1k views

How can I stop SMB on Windows 7 null authenticating?

This is a nasty question to be asking but we're really desperate. By which I mean we have about four hours to fix this or dire consequences will follow. We have a PC for card processing in our office ...
0
votes
2answers
406 views

Web server hardware firewall recommendations [closed]

I'm looking for a specific hardware firewall model solutions that best accommodate the following concerns [Cisco models are best, because our colo can get good deals on them reconditioned]: There ...
0
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2answers
2k views

Only allow ssh connections to a specific domain

I have a server setup with several domains and subdomains. I'd like to limit ssh and sftp access so a user can only connect to xxx.domain1.com but I'm not sure where this is configured. Connecting ...
0
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4answers
2k views

Alternative to IBM WebSphere DataPower XML Security Gateway XS40

Is there any alternative to this IBM solution for a SOAP security gateway? Maybe open source software or hardware from other vendors?
0
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4answers
2k views

What firewall rules should be used for a home based system [closed]

I'm just setting up a home wireless network with connection to the internet. The router has settings to configure the firewall rules. Currently it's set to INBOUND ALL ANY and OUTBOUND ALL ANY. ...
-1
votes
3answers
287 views

iptables — am I doing this right?

UPDATE Boy am I glad I asked. OK, I'll try again and post another question. I'd like to set up a CentOS 5.3 host to allow only ping, ssh, httpd, and SSL connections. After reading a tutorial and ...
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 ...
10
votes
4answers
6k views

Add a user to the “Team Foundation Service Accounts” group in TFS

I need to add a user to the "Team Foundation Service Accounts" group in TFS to be able to run the TFS Integration Tool. I am an administrator on both the machine running TFS and the TFS Install (ie I ...
7
votes
2answers
8k views

What the meaning of “policy ACCEPT” and “policy DROP” in iptables?

When running service iptables status on 2 CentOS server, one server has policy ACCEPT in Chain INPUT, Chain FORWARD, and Chain OUTPUT another server has policy DROP in Chain INPUT and Chain FORWARD; ...
6
votes
1answer
1k views

Possible to limit an EC2 key to just ec2-associate-address?

I have a regular EC2 instance with an elastic IP. The few times the instance has been stopped, I've just manually re-associated the IP with it via the AWS Management console. I'm now thinking about ...
6
votes
5answers
301 views

Kids + older computers + our network at the office: Security risk?

On occasion, some of my coworkers feel compelled to bring their children to work with them. (I feel compelled to smack them, but that's probably a topic for Parenting.SE.) To ensure that the ...
6
votes
13answers
2k views

Mysterious html inserted into my site's pages (hacked?)

Twice, I've found weird code the top of my index.php. The first time, it was this: <iframe src="http://ntwportal.com/" width="2" height="4"></iframe> Then this: <iframe ...
6
votes
7answers
3k views

How Could My Website Be Hacked

I wonder how this could happen. Someone deleted my index.php files from all my domains and puts his own index.php files with the next message: Hacked by Z4i0n - Fatal Error - 2009 [Fatal Error ...
6
votes
2answers
2k views

Virtual host on LAN - VMs on DMZ, separate NICs - is this a bad idea?

Just kicking this idea around, and wanted to see if you'll be so kind as to point out the problems I don't see. If I set up this new HyperV host as a normal domain member, the benefits are obvious. ...
5
votes
2answers
1k views

Is it ok to leave the MySQL root password blank?

Does a root user without a password constitute a security breach if my MySQL server only accepts connections from localhost? I'm aware that the common wisdom says the root user should be protected by ...
5
votes
6answers
3k views

fail2ban and denyhosts constantly ban me on Ubuntu

I just got an Ubuntu instance on Linode. To secure the SSH on it, I installed fail2ban (using apt-get), but then had a problem: fail2ban kept banning my IP (for limited durations, thankfully) even ...
5
votes
5answers
505 views

If I use ftp or telnet by accident, to what extent is my password unsafe?

if i use ftp or telnet by accident (usually on the bash shell), to what extend is my password visible? can my coworker see it? can my neighbor see it if i work at home (if not using wireless)? can ...
4
votes
7answers
555 views

Configure a “hardened” user account that an attacker would have a hard time abusing

Suppose you have a Windows Server machine running various sensitive services. Suppose that one of these services is pretty simple, maintaining a small amount of information in a text file, but as a ...
4
votes
3answers
2k views

How do I secure my Asterisk server?

Our asterisk server was compromised. some calls were made to Asia countries last weekend. Thought we have improved our network configuration, we still want to determine how the intrusion was done, we ...
4
votes
1answer
652 views

Get SSH fingerprint from remote server securely?

I had thought about this and my host provides out of band support, so I could simply create the key fingerprint out of band and compare it when connecting to that server from home. Is there any other ...
4
votes
2answers
17k views

How can I edit local security policy from a batch file?

I am trying to write a utility as a batch file that, among other things, adds a user to the "Deny logon locally" local security policy. This batch file will be used on hundreds of independent ...
4
votes
4answers
5k views

Authenticating Windows 7 against MIT Kerberos 5

I've been wracking my brains trying to get Windows 7 authenticating against a MIT Kerberos 5 Realm (which is running on an Arch Linux server). I've done the following on the server (aka dc1): ...
4
votes
3answers
2k views

Comparison of Firewall, Intrusion Prevention, Detection and Antivirus Technologies in Organizational Network Architecture

in these days i'm reading about intrusion prevention/detection systems.When reading i really confused in some points. First, the firewall and antivirus technologies are known terms for years, however ...
4
votes
3answers
3k views

Hosting multiple repositories, each with differing access control

We will need to host a series of Mercurial repositories. For security, we will use SSL encryption in Apache and htpasswd access (required). I tested out a single repository and used hgwebdir.cgi and ...
3
votes
3answers
2k views

can localhost be spoofed?

Is it possible for a remote machine to access another machine's localhost data by spoofing the loopback ip? Say if I wanted a setup where if I'm connecting from somewhere outside my own network, I ...
3
votes
2answers
1k views

Does adding an user to the apache group creates a security hole?

Beginner question. I saw this mentioned on a website, considered a bad practice,but can't remember where and why. So, if I have an user which has access to files that Apache shouldn't have access, and ...
3
votes
2answers
1k views

Securing PHP via open_basedir based on script path

I have several users running PHP scripts on a server and I'd like to lock it down so that their scripts can only access files in their www directory (it doesn't use linux user accounts, so there isn't ...
3
votes
3answers
1k views

CentOS PCI Compliance assessment

We are currently working our way through a PCI compliance assessment on our server running CentOS. We are getting a lot of 'severe' issues with suggested fixes. The suggestions to rectify the issues ...
3
votes
5answers
3k views

Apache DDoS Protection in router (pFsense) [duplicate]

I'm soon going to change my infrastructure when I buy a new server. I'm going to replace my D-Link DIR-655 router with an pFsense router (and probably use the 655 as an AP) using my old server ...
3
votes
1answer
14k views

Best practices for hardening/locking down Windows Server 2008 R2 for use as web server?

What actions should be taken to 'lock-down'/harden/secure a windows server 2008 R2 machine, when used as a web server (with remote desktop access)? Are there any elements that are enabled as standard ...
3
votes
3answers
411 views

Looking for a way to audit/monitor removable media on a Mac

We have a client who's requiring that we implement dataloss prevention on workstations that are accessing their project's data. If Alice attaches removable media (USB, FireWire, CD, DVD) to her ...
3
votes
2answers
6k views

Plesk HTTPS setup and directory problems [closed]

We are trying to configure SSL for one of our domains hosted on a Red Hat server running Plesk. Plesk version: 9.5.2 Apache: 2.2.3 Redhat: 2.6.18-194.el5 We created a new SSL certificate entry ...
3
votes
3answers
11k views

Domain User can RDP into Domain Controller?

Vanilla Windows Server 2008 x64 Standard DC (AD, DNS). I was remoting into my DC to do a bit of work and, thru force of habit, logged into the server using a regular domain account, not a domain ...
3
votes
3answers
2k views

How to encrypt traffic between two Amazon EC2 instances?

We are building a web app using Amazon EC2 instances running Linux. All the traffic to the client browser is encrypted with SSL. What should be used to encrypt the traffic between the instances. The ...