A server is a machine running a software daemon that is generally accessed over a network by other machines.

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how much of a security threat would this be?

If I set up a Domain Controller server to be accessible from the internet via Remote Desktop Connection (through port forwarding in the router), how much of a threat would that be? and if I have a ...
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61 views

Per-transfer authorization of file transfers on a per transaction basis

In my organization, users have the rights to transfer files to and from servers using SSH File Transfer protocol for a variety of reasons; e.g. application troubleshooting, BAU, etc. Although our ...
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487 views

Custom Python Server - how to secure it?

I'm going to purchase my own dedicated server service soon and run few python server scripts on it. Firstly, let me tell you that I am total noob when it comes to internet security and was unable to ...
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115 views

Guidelines on out-of-band server management via integrated Lights-out services (iLO, iDRAC etc.)

Several CVEs (CVE-2012-3271, CVE-2011-4158, and earlier) point out vulnerabilities in remote server administration firmware; what are the guidelines on hardening this extremely useful component of ...
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28 views

Is it a good idea to disable WHM backend and only enable it through ssh when needed?

I have recently set up a managed VPS and it came per-installed with CentOs and WHM. I have configured SSH logins to use private keys and i can SSH into the server with root privileges. I realize ...
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32 views

Categories of security when evaluating services and protocols

I'm setting up some externally accessible services for a small business, and evaluating some of the different options I have. This is all new to me. I have found the question, "is this secure?" to be ...
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134 views

storage of client credential on OAuth2 server

I'm developing an API and used a recommended implementation of OAuth2 protocol: PHP OAuth2 Server. This library stores client ID and client secret as plain text in a database table. Note that I ...
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160 views

Securing a VPS network with a VPN and a DMZ

I've got several VPS boxes (Digital Ocean boxes w/Ubuntu) that I would like to lock down from the outside world. I want to have several private boxes (web servers, db servers, puppet/master boxes ...
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55 views

Defense of a server against malicious uploaded resources

We know that viruses and other threats can propagate through mail etc.But when any resource is shared,it is uploaded to the server and then shared.This means that the server does not take the ...
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151 views

How to trace AD Admin Login

How to trace an admin login to active directory server (2008 R2) from which host or which ip (In the situation where multiple admin are working) ?
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114 views

Is it possible to block specific users that connect to the internet behind of same gateway with NAT?

Assume there are two internet users (A and B) that connect to the internet from the same gateway by using NAT. That means they use same IP address while passing through our firewall. Now assume we ...
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96 views

Hardware-restricted root login

I was thinking about how security on my Linux server can be increased and came up with this question: If most intrusions are performed by gaining remote access to machines, would it be possible and ...
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151 views

MITM Attacks with Web GUI

I'm thinking of writing an application that communicates sensitive information (using Python, if that's relevant). Instead of using the standard GUI libraries (like GTK, Qt or wxWidgets), I was ...
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264 views

Is a separate server needed for remotely accesing accounting software?

Wishing you all a great 2014. I hope this is the right section. Basically we have a Dell Poweredge R520 server in our office, and we now want to install some accounting software that can be accessed ...
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124 views

Renting a remote server with IPMI: is one vulnerable?

It has been reported in the media and some security conscious mailing lists that some IPMI-enabled servers, implementations and brands suffer serious security issues. When you go to a dedicated ...
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196 views

Main requirements to secure my Application in any database related features

I have an application which is hosted on a windows server on which an SQL DB exists. This server communicates with the clients and agents installed on host PCs through TCP/IP and SSL connections. I'm ...
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4answers
331 views

Learn about network and security for securing a server

I'm setting up an OpenBSD server that I want to connect to the Internet (it's going to be used to host a site - so, with Apache, SQLite and the like). I want it to be as secure as possible. Social ...
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37 views

Domain Exploitation [closed]

I have set up a domain testing environment on a couple of old computers that i had lying around at home. I have done a lot of information gathering and attempts at exploiting the machines via ...
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24 views

Windows Domain Controller Authentication Logon Logging and Forensics [migrated]

This question does not take Windows Server 2003 and older OSes into consideration. I know that for local logon (event ID 4624) also the logon type is logged (interactive, remote, etc.). Is there a ...
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25 views

Is a direct SIP video call (encrypted) between two computers more secure than going through a registrar service?

I learned recently about ZRTP-encrypted video calls using an SIP client, such as Jitsi or Linphone or Blink. I was able to make a direct encrypted video call between two clients on the same local ...
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16 views

nslookup shows wrong data [migrated]

I am currently an administrator and have about 150 windows systems running. The previous administrator turned out be be a real nightmare for me before he left. The network assignes some windows ...
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52 views

Secure (P2P) Client/Company File Sharing

my small web design company currently uses a cloud storage service to collaborate with our clients and I would like an easier (and more secure) way for files to be transferred-in and stored. The ...
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94 views

Implications of Bash history [closed]

I am using Salt Cloud to script my deployments of a small collection of commercial servers. Since it is cheap to get things right the first time, I'd like to avoid obvious mistakes. If I leave my ...
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376 views

Mobile Backend Server: How to validate authenticated client is valid?

Consider this scenario Step 1: App asks user to "Sign In" using Google or Facebook Step 2: Once authenticated, app sends user's Id (from Google/Facebook) to My App Server requested to app ...
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69 views

Protecting encryption of outdated software with a server

I have a 1st generation iPad, and I usually use it for web browsing when I'm home. The 1st gen iPad can't run newer versions of iOS (I'm stuck with iOS 5). I went to a website that tells if your SSL ...
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419 views

How should IPSec be configured to provide a protection at least as good as my current Stunnel configuration?

In private network (as in using a private IP address space) at a cloud provider, other customers have access to the same private network. I have secured the communication between many hosts and ...
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130 views

Are buffer overflows on websites stoppable?

Recently, I was at the bookstore checking out books on computers. I found an interesting book on various types of hacks and how to stop them on your servers. One that caught my eye was the "buffer ...
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62 views

Application-Server connection security

I have this school project of mine that involves an app and a website that use the same database. The app serves as an administration tool for the website. Since it's made in C# and it's not as ...
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253 views

How do I prove for my client that unused ports are closed and unused services are disabled?

I have seen advice that I need to close all unused ports, and disable any unused services in order to secure my servers. How can I prove, beyond any doubt, to my client that I have done this? I need ...
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94 views

What influences the speed of rendered php page using encryption [closed]

I've built a web app which uses the openssl_private_decrypt() functions. The rendering of a page with 15 messages encrypted with these functions takes remarkely longer as the ones without. (3-4 ...
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329 views

How does Shodan crawl internet-connected devices?

I wonder how Shodan crawls internet-connected devices and adds them to its database. I know Google, for instance, finds new websites by following links in websites it already found, but that strategy ...
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104 views

Is there any reason to allow Python fetches of my Web server's pages?

I keep seeing "python-requests/1.1.0 CPython/2.7.4 Linux/3.8.0-19-generic" requests e.g. from Amazon's servers of my website. It's kind of creepy. Who would set up an Amazon server to scan websites? ...
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355 views

How to protect server uploads

I want to upload .jpg images to my Linux server so that clients can re-download the files when they want. Supposing unknowingly there is a trojan, worm or malware in my computer, will these be ...
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31 views

SELinux ignoring /etc/sysconfig/selinux directive

I'm running SELinux on CentOS 6.5. In /etc/sysconfig/selinux I have set SELINUX=permissive. But everytime the system starts, sudo getenforce shows SELinux as Enforcing. What could be causing it to go ...
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68 views

unfamiliar IP when logging into ssh server

I just noticed something today, and Now I am curious... I was on my shell server, an i was wondering who was on, so I gave the command $w and saw this: j0h@server:~$ w 22:06:02 up 18 days, 7:02, ...
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Subdomain-only SSL security/availability

CAcert and StartSSL both only validate domains whose TLD is owned by the requester. I have a few subdomains that come from places like freeDNS that I would like to run an SSL-secured server on. Are ...
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73 views

Restricting locations for unzipping a zip file

I hope that I have found the correct place to ask my question regarding unzipping files. I would like to see if there is a way to restrict the locations available to the user to unzip a password ...
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318 views

Recent “attack” to my server that might be using shellshock exploit

I just notice this repeated entry in nginx log: 31.184.194.114 - - [04/Mar/2015:10:29:53 +0700] "GET /cgi-bin/up.cgi HTTP/1.1" 301 178 "-" "() { :;};/usr/bin/perl -e 'print \x22Content-Type: ...
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66 views

SSH stealing files from client?

Is it technically possible for a ssh server to steal files from a connected client?.
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905 views

internal proxy server vs DMZ proxy server

What would be reason for placing a proxy server in a Demilitarized Zone (DMZ)? I understand that a DMZ is a separate network to your internal network (lies inbetween internal network and firewall). I ...
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85 views

Create https session between server and client

I'm doing a project about security transactions and i'm wondering if to establish a connection based on https both client and server need to have a ssl implementation installed to preform the ...
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2k views

Should I restrict Core Networking firewall rules in Windows server?

I have a server that I want to restrict access to by allowing only one IP address to be able to connect to it through desktop and make http request through port 80. Now in my firewall I only have ...
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90 views

What are the risks of uploading and downloading data in binary (non-encoded) format to servers and browsers?

I admit up-front that this question may be the result of unfounded paranoia. But I am concerned that uploading and downloading data in binary form opens the door to exploits that might not be ...
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196 views

Implement server serial key for server software

Me and my friend want to sell game server-side software, but we want some sort of control, over use of that software. For example, we want some sort of serial key system, so only verified/paid ...
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Storing LVM encryption key on network share [migrated]

I want to encrypt all my LVM LV's and have them automatically unlocked on boot using a keyfile available on my network. I can make the files available by SMB, NFS, HTTPS, etc. I have Ubuntu Server ...
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58 views

How can I ensure safety when literal passwords are required

I have a case at my hands where my server needs to make automated API calls. Those require authentification. Hence the server will need to know the literal passwords to make those calls. What options ...
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116 views

OWASP ZAP with self-signed server cer

I have my browser connect to ZAP via proxy with ZAP cer imported into firefox. I am getting " "connection timeout" when trying to access self-signed server but i am able to see traffic from ...
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How can it be possible to have encrypted communication between a server and a client if the server has only a public key [duplicate]

If only the server has an electronic certificate (User ID, Version, Public key), how can be possible the encrypted communication between the client and the server?
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Transmission of messages

I am currently developing a game which will be run in a client, they will sign up for this game online and create their account there, their information will be stored into a MySQL database. I am ...
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Working from many places <-> being able to restrict SSH access to server to IP range

I administer a webserver, and while I'd like to restrict the SSH access to an IP range, I wouldn't be able to do so because a) I travel a lot and b) I don't have a static IP at my homeoffice. I've ...