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

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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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257 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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60 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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125 views

how to trace or get evidence you've been hacked [closed]

my devices and my network have been compromised. I foolishly left my router unprotected and they were able to gain access to all my apple devices and then install some sort of software that will take ...
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251 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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4answers
140 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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221 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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341 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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133 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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216 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
409 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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46 views

How to keep home hosted webserver safe [closed]

I've got a raspberry pi I used as a web server. It's not for any sort of commercial traffic I just have it as a machine on my network so I can SSH/FTP in. I recently setup a page linked to a domain ...
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27 views

Is it secure to have an iPad app run a webDAV server on localhost without authentication?

I have two iPad apps running on the same device. One is hosting a webDAV server on http://localhost:8080 without any authentication (the server is active whilst the app is foregrounded, and for a few ...
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54 views

Is there a solution for On-the-fly-encryption with active directory rules & policies?

I am looking at having our servers' sql databases for a few program and documents to be always encrypted on the HDD, but available to AD users. So one or multiple users with the right AD privileges ...
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92 views

Store/retrieve users passwords on server (using password managers ?) [closed]

I am working on a project in wich a school's server will need to use students' passwords periodically to connect to another website for them. I am aware that storing users' passwords in a server ...
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592 views

Prevent CryptoLocker on Server

A quick question, which may have a not-so-quick answer - Are there any ways to prevent files associated with CryptoLocker, to be propagated to a data server, by means of a back up? We use Cobian as ...
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71 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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116 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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141 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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105 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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84 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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3answers
47 views

Securing online SQL database and server [closed]

I am trying to build a big project but lack the knowledge of security of servers and SQL. So, please help me by telling what necessary steps should i take. Block all remote access :- I have heard ...
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5answers
228 views

DDOS Server Attacks & Domain Names

I'm currently with a web hosting account whose servers seem to be constantly down due to DDOS attacks. I check my analytics daily and I'm seeing a major surge in fake traffic for several of my URLs ...
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102 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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315 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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4k 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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126 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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125 views

Encrypting the System Infrastructure

The requirements are to Encrypt the data in our servers 'at rest' and the 'database' - in short the whole infrastructure. Threat Model - to protect a possible data-breach by an adversary (or from ...
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968 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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586 views

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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146 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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417 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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57 views

Man in the middle attack on loopback

We made a client/server program that runs at localhost. Is it possible to execute a man in the middle attack on the loopback between the client and server?
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166 views

Command & Control Server List [duplicate]

I recently got an email from my ISP saying that they'd detected traffic to a known Command & Control server from my home. Boo. I'm sure this probably means one of our computers has some awful ...
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Is it possible to FDE a VPS/VMS

Is it possible to implement Full Disk Encryption on a Virtual Machine Server or a Virtual Private Server? Also, if it's possible, will the service provider (of the VPS) be able to decrypt/see my ...
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99 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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85 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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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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47 views

Dealing with a malware infected server

I have a web server which is heavily infected by malware. That is, around 12 websites (Outdated CMS) are infected by PHP shells and XSS. My websites are banned and are not accessible anymore. I have ...
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3answers
125 views

Is it possible for an attacker to redirect a packet sent by a client, modify it then sent to original server

Theoretical question: Is it possible, or will it ever be possible, for an attacker to sniff/intercept it and redirect a packet, sent from a client through wireless, modify it and then sent to the ...
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242 views

Why is Parallels Plesk running on port 8443 > 1023?

Parallels Plesk, a server administration software package, uses HTTP(S) on port 8443 (ref). I know that ports <1024 are only available for root. This means that if the server Plesk is using for ...
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107 views

The security of dll files in a Client/Server application in .net [closed]

I'm going to write a Client/Server application. There are some ambiguous concepts in this that I was not able to get answer to after many hours of searching. As we all know one of the major caveats ...
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430 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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103 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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3k 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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114 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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107 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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290 views

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 ...
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242 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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SQL server standard edition encryption [migrated]

I'm trying to look into what kind of encryption I can do with SQL server standard edition from 2008 forth, so far I know that I can't use TDE as that's part of EKM. When I look up this topic I'm ...