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

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80 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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55 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Protecting encryption of outdated software with a server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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137 views

Does using NAT-T for L2TP / IPsec VPN pose a realistic security risk?

I'm working on upgrading an old Windows RAS server that hosts PPTP VPN. I want to move to a L2TP/IPsec VPN. Due to the firewall appliance we use, the VPN server has to be behind a NAT. This means ...
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1answer
320 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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4answers
6k views

How is HTTP PUT and DELETE methods insecure, if they really are? [duplicate]

If I really need to use these methods, how do i make sure they are secure? Edit: Is there a link or source where I can see how to make sure that 'PUT' and 'DELETE' methods are not able to delete or ...
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2answers
165 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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2answers
78 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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1answer
184 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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1answer
100 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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5answers
331 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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1answer
63 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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139 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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2answers
70 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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1answer
69 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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2answers
1k 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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1answer
87 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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3answers
170 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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0answers
27 views

How can I Run my Kali Tools on a Remote Server [migrated]

I am currently ssh-ed into a remote server. However, I do not have root permissions on the remote server and therefore am unable to install and use tools such as nmap. I've been trying to figure out ...
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1answer
15 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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1answer
95 views

What is attacker trying to do with my server?

Some is trying to access this link (and similar ones) frequently in my site: http://mysite.com/upload/RS=%5EADAJVxZ5NB.GMTgFV3EMEJX3sN22Jw- Note that my server doesn't have an upload folder inside ...
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1answer
229 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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0answers
188 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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0answers
84 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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0answers
20 views

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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91 views

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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179 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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1answer
45 views

Where do I start securing my system? [closed]

I am working for a company with perhaps the least security possible. We have servers, databases, web applications, and websites that are all unsecured. There only exists one account: root, which ...
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1answer
76 views

Configuration for a server [closed]

I would like to configure a server and need guidance in assembling a server. I do not wish to spend much but at the same time I do not wish to compromise on performance. The purpose for my server ...
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1answer
56 views

Exchange of encrypted files through a server

I have a thing to do, that basically bases on a server that is honest but curious. Therefore I want the server to have the public key for encryption and it will encrypt files during the process of ...
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1answer
80 views

Server security experiment? [closed]

Okay, so I am in a university class where we are using a server. Each student in the class has access to the server. We all share it. I can see their files and open them, and they likewise can see ...
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1answer
63 views

Should I do science of computing or systems analyst? [closed]

I want to become a federal analyst of cyber crimes and I dont't know what's the right university course for me, I would like to know what's the cons and pros of choosing one or another course and ...
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1answer
366 views

Spoofed DDoS mitigation / DNS amplification mitigation [duplicate]

Recently my server has been attacked multiple times, after looking at my firewall I've come to the conclusion that the IP's are spoofed. (10,000+ IP's connect at once) I'm running Win server 2012 x64 ...
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1answer
162 views

Hacker problems - They stole my backups [closed]

I am facing an issue where hackers are seeking to compromise two of my servers. They succeeded in wiping out both and stealing my backups. I had off-site backups and I am back online. Nonetheless, I ...