Security is not a product, but a process.

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Setting up PGP FTP

I have a situation where I need to setup a FTP server with PGP encryption. Currently I use FileZilla w/ SSL, but in this case we are required to use PGP. Any recommended products/procedures from ...
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1answer
516 views

ld library problem

I am getting the below error while checking status of any service or stoping starting any server on my linux server. Its CentOS-5.4 server. sh: /usr/bin/(swapd): /lib/ld-linux.so.1: bad ELF ...
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3answers
66 views

One of my VPSes is very sluggish usually past midnight ( 1-5AMish )

I've noticed that on one of my VPSes ( debian 5 lenny ) ( not my linode ones but a host I used prior to linode ), the filesystem is very, very sluggish past midnight. If I try to use the command ...
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3answers
513 views

Database security guidelines and tips

I have been recently hired by an event-planning company to create a web application that will allow online payment for specific events and keep a list of registrants. My employers are asking for a ...
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6answers
119 views

Which are services or programs do I need to watch from linux security point of view

I was just watching the log files for my web server and saw a few log entries for SSHD. I can see that someone is continuously trying to connect via ssh with wrong username and password. i just saw ...
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3k views

Win2003 Folder sharing : Group permissions not working while user permissions work

I'm very new to windows server. I'm a software engineer but since we don't have a real sysadmin I'm supposed to figure out everything that is slightly computer related (you know how it is...). I need ...
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1answer
2k views

What is host/computer SID in Windows AD? and what is needed to identify the elements of network with it? [closed]

SID as http://en.wikipedia.org/wiki/Security_Identifier 1) Help me to clarify the concept of computer SID on hypothetical situation: suppose, I want to secure a network cable (for ex., from a ...
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2answers
624 views

Potentially vulnerable to CVE-2009-3555

When checking my (secure) site https://www.just-great-software.com/ with Firefox 3.6.6 the Error Console shows: www.just-great-software.com : potentially vulnerable to CVE-2009-3555 Is this ...
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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 ...
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2answers
369 views

Ubuntu server security; Is this enough?

I have a classifieds website, which uses php5 and mysql, and also java (solr). I am new to linux and VPS... I have installed SSH, and I have installed IPtables, and also I have PuTTY which I use as ...
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3answers
581 views

Is it good to defense for DOS attacks with 2 request/sec?

Lots of example told me to defense with 5 or 4 request per second. Because usually a visitor clicking about in 1 or 2 links in one second, I think defense with 2 request per second is just fine. But ...
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273 views

I found a Ukranian spammer and have the exact query, IP and access time. What next?

Before I turned on comment moderation, these guys would leave comments meant to steal my Google juice (by getting an inbound link). I can still see them visit... the question is what should I do ...
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3answers
970 views

Is AuthType Basic secure when used over SSL?

I am authenticating clients of an apache2 server using AuthType Basic over SSL secured connections. I imagine these are secure, as the usernames and passwords are encrypted before they are sent to ...
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2answers
99 views

Accesibility of modified EC2 instances

This page on EC2 documentation site describes how to modify and store an EC2 instance. What it does not specify is whether the resulting instance is publicly available or not. How, and where do you ...
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3answers
902 views

Windows Server 2008 Firewall: Do inbound rules override outbound rules?

I have in inbound rule to allow all communication with MyApp.exe I have an outbound rule to block all traffic to 192.168.0.88 Can MyApp.exe communicate with 192.168.0.88 - I don't understand which ...
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2answers
418 views

Securing /var/www

I always did this: chown apache2:apache2 /var/www/ -vR chmod 555 /var/www/ -vR chmod 755 /var/www/a/special/dir/which/needs/write/permissions/ -vR OR instead of 2, 3 just set permissions to 755 ...
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6answers
1k views

Disable User Account Remotely

I work for a highly distributed IT based consulting firm with approximately 150 users in the field at different client sites at any given time. As we have grown we have needed to ability to disable a ...
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1answer
55 views

Microsoft patching folders

After extracting a Microsoft security patch, I got several folders containing the updated DLL. For Windows XP SP3 I have two folders: SP3GDR and SPQFE. Does anyone know what is the difference between ...
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3answers
299 views

Sharing directories in a Windows Workgroup

What is the best way to share and give permissions to certain users/computers in a workgroup? Does each user need the same account/password on every computer to have access to each others shared ...
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1answer
38 views

What do these logs mean? Am I attacking someone?

This night my server got put in an "anti-hack" mode where I could only use a read-only FTP to download my data. They told me that I was being a threat to the network, and that these were the logs ...
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1answer
45 views

What type of SID ends with -0?

I have been parsing through the logs and found a random sid doing authentications against AD. It is as follows "s-1-5-21-xxxxx-xxxxx-xxxxx-0"; It cant be found in domain or forest. I want to know if ...
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1answer
40 views

Can VPN authentication be used for SSH?

Can VPN authentication details be re-used for SSH access? Context: I'm looking into the feasability of having SSO to authenticate with a VPN and then be able to log into a server via SSH without ...
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2answers
217 views

Lost all local admin rights on domain joined computer

I'm in an unusual predicament in that there is no account I can use to add local admin rights to a computer with the exception of the Administrator account - which is disabled. On a new domain I'm ...
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1answer
43 views

Securing outgoing emails with logs of a web server

On the web server I am going to run rkhunter, tripwire, OSSEC, fail2ban and psad. All of those applications need to be able to send emails to notify the sysadmin. Therefore, I've: sudo apt-get ...
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1answer
31 views

Block/Prevent Adminer - Apache [duplicate]

I found out that if someone was able to hack any FTP account on my server and upload Adminer they could alter the database. I tried Google'ing a way to block or prevent Adminer from working, but got ...
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1answer
95 views

Https transparent proxy and SSL certificate validation

If I setup a transparent proxy for https connections using a SSL certificate signed by my local CA and distributed to all my active directory clients by GPO, may the client (browsers) reject or advise ...
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2answers
134 views

Can one domain have 2 or more SSL certificates?

I have googled and found this post: http://security.stackexchange.com/questions/46988/is-it-technically-possible-to-configure-two-different-ssl-certificates-for-the-s If it actually is possible, then ...
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1answer
51 views

Secure Database Password Contained Inside a File

I've got a Linux based application (Java) that connects to an external database (PostgreSQL) in the same LAN. However, due the sensitiveness of the database contents I would like to avoid the admins ...
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1answer
507 views

Pricing of Key Pairs and Security Groups on AWS?

My free AWS account expired. I deleted all S3 and EC2 resources, but am wandering if I can leave the Key Pairs and Security Groups without having to pay for them. (My account resources look like this ...
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4answers
114 views

where should the site root directory be? [closed]

Where should I put my site root directory "my_site"? Any best practice? /var/www/my_site/ /var/local/sites/my_site/ /usr/share/wwww/my_site/ /usr/local/my_site/ /opt/my_site/ /srv/my_site/
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1answer
57 views

MySQL via SSL on VPC private subnet

Is an SSL connection recommended when connecting to a MySQL database server via a private subnet? SSL provides encryption but SSL causes a performance hit. The MySQL database server only serves ...
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3answers
87 views

locking up a linux box on a foreign network

I have an app that runs on a Linux server and is accessed via each user's web browser. My app contains proprietary code that I need to keep secure. I want to install the app in a client's private ...
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1answer
336 views

Windows 2008 r2 not using default security groups (ie Domain Admin) prevented from changing own password

Apologies if I did not find a question similar to mine but i have searched honest! Firstly we have undertaken a no default group approach to our security on active directory. This has been very ...
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2answers
96 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: # ...
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1answer
163 views

Exchange 2010 security audit

Our IT department has received reports from HR that managers are reading their subordinates email, and we've been tasked with identifying if there is a technical way to achieve this. I'm looking for ...
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2answers
76 views

Is there a use case when traffic needs to be secured between 2 AWS instances?

According to Amazon's security white paper, it is not possible sniff traffic by other tenants http://awsmedia.s3.amazonaws.com/pdf/AWS_Security_Whitepaper.pdf Question: Is there a use case when ...
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1answer
923 views

Unable to install Network Deployment Enrollment Services (NDES)

I'm trying to install NDES on a Win2k8 R2 server, but I can't see the option. I've already added a user to IIS_IUSRS, and that user as sufficient priveleges since it is a part of the Administrator ...
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2answers
231 views

Should munin be password-protected?

We use Munin at work. There is a Munin install - which right now is open to the world. An admin doesn't think he needs to password-protect it. What's the worst that can happen? How can I convince ...
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1answer
161 views

How can the mutt shell-escape feature be disabled?

We are thinking of offering mutt for our member's email client. The user's shell is instead the mutt application launched on their Maildir folder. It works great so far but one huge problem is the ...
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1answer
34 views

Protection of a dns server

I recently started to host my own domains on my servers. I can already see a fair bit of bogus queries arriving to my servers. Some dns amplification attacks, etc. What can I do in order to further ...
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1answer
4k views

LDAP throws Event ID 2887 warnings even after enabling “require signing”

I am running an AD LDS directory and, ever since configuring it, I have been seeing 2887 warning messages, so I have decided to follow this guide to have the server require LDAP signing. The problem ...
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2answers
858 views

Web server atack DDOS

I have a server (vps) to use as a repository and testing (gitlab and redmine) server. However apache crashed, seeing the /var/log/apache2/error.log have many errors of this type: [Fri Jan 31 ...
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1answer
45 views

What are the recommended internet security measures to take? [closed]

I have built a speical-purpose server, the only purpose of this server is to download some data from a remote(internet) data feeder and do some data processing in the server as well. The only ...
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1answer
69 views

How communication works to connect server with or without VPN [closed]

When I ssh into my companies server without using VPN, then I get then quite understandably it cannot connect. Once I log into the companies VPN, I am able to connect. Breaking my questions down: ...
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2answers
172 views

Is mac address based security for single user Web Application a good idea?

I made my first web application dedicated to a single user. Being a system administrator it would be simpler for me to lockdown security on the operating system side rather than on the session side. ...
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1answer
189 views

Way to script Local Intranet settings?

There's a dialog in the "Internet Options" control panel applet if you go to the Security Tab, highlight "Local Intranet" and press "Sites" that looks something like [X] Automatically detect intranet ...
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1answer
56 views

Allow HTTP packet from specific hosts on an ec2 instance strictly

I have an ec2 instance (proxy) which is being used as http proxy server. There are some other hosts (hostA, hostB, hostC), I want the proxy server will only allow connection from those hosts. For ...
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2answers
150 views

Understanding Auth Logs on Ubuntu Server [duplicate]

I have a web application that I'm hosting on an Amazon Ubuntu server, and it has a public IP address - and very little traffic. I was observing the authorization logs in /var/log, and noticed several ...
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1answer
1k views

Is there an open source equivalent of Windows software restriction policies for Linux?

For a presentation I am doing, I am trying to find out if there is a Linux based open source application whitelisting service for Linux, Similar to software restriction policies in Windows since 2002. ...
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2answers
595 views

Multiple POST requests to same file from same IP address

I periodically check my apache domlog to check for anomalies in GET and POST requests. Earlier today I noticed the same POST request to a login php happening two and sometimes three times a second for ...