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

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Communicate through gpg

I need to frequently communicate with a server in the manner do stuff related to x or send me info of x My thoughts are to directly put the task I want to be executed into the package I want to send, ...
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1answer
545 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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1answer
84 views

Authentication on client server

I have following requirements for system: My admins authenticate on client servers Over http Central authorization server My solution is based on O-Auth: user is redirected to authentication ...
4
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1answer
342 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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0answers
76 views

Ubuntu server seems compromised for a DDOS attack [duplicate]

I have this VPS Ubuntu v12.04 Server running with DigitalOcean. Zpanel/Apache/PHP stack was installed on the Server. For the past few days it was occasionally down. Initially, I didn't know what ...
2
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2answers
227 views

How secure is loging into internet banking via an https library?

My bank does not have an API so I want my server to log in and check incoming payments to notify me if a client has paid or not. I would like the server to log in and scrape using Beautifulsoup and ...
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0answers
28 views

Is there any risk in allowing clients to be fed opengl shaders?

I'm working on a project that may eventually involve server specified fragment and vertex shaders. What are the possible risks of allowing a third party to send fragment/vertex shaders and execute ...
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2answers
289 views

Don't store passwords in database? [closed]

Where might someone keep them besides a database? By storing passwords elsewhere I mean a non-traditional database. Allow me to explain. A couple of my friends run high security websites. They ...
6
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5answers
428 views

Does setting a default DROP policy actually improve security?

It seems that the status quo at the moment is to configure firewalls to drop any packets that aren't destined for specifically-opened ports. Many defensive port scanners (such as ShieldsUP!) seem to ...
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1answer
1k views

Git server security

I want to install a Git server for my company. I'm able to get a Windows virtual machine. Now I've been asked to assess its security aspects. I'm lost on how to achieve this goal. As it is a Windows ...
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3answers
57 views

Which attacks can a malicious hosting company execute? [closed]

Which attacks can a rogue hosting company carry against the servers it hosts? Assume that the rogue hosting company also provides full access to law enforcement. I was just wondering about that. So ...
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2answers
124 views

Verifying Client with Server

I'm currently designing a basic Java program that uses sockets to communicate from a server to multiple clients. I want the clients to be unmodified, however, to prevent against users trying to use ...
1
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1answer
78 views

How to make sure my HTTP server on Win 7 is secure? [closed]

I'm hosting a HTTP server from home. I'm concerned about security issues since the machine has some personal files in it. I have forwarded data from external IP port 80 to my IP at port 80. The ...
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0answers
46 views

Is there a pre-established method for cracking RSA SecureID codes?

I am using the most modern version of RSA SecureID's tokens with a RSA server (used with a lot of governments and larger organizations ). I was just wondering if there was a pre-established method for ...
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1answer
95 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 ...
5
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1answer
95 views

Mail client: Public key pinning

I'm running my own mail server setup: - IMAP: Dovecot - SMTP: Postfix There are 4 clients which retrieve emails via IMAP: - iOS (Default client: Apple Mail) - Android (Default client) - Mac (Default ...
2
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1answer
104 views

What does this attack string do? How do I mitigate it?

Today I decided to run the apache-scalp script and it found a few issues. One was ranked as Impact 5, and I'd like to know if someone could explain what this does, and how to disable it? The request ...
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0answers
94 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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3answers
149 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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3answers
686 views

Error message in Apache logs shows /bin/bash and wget

I am wondering if my server is compromised or not I just looked at my log and seen the following line in there [Thu May 14 09:10:42.587255 2015] [autoindex:error] [pid 3422] [client 207.141.124.18:...
0
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1answer
38 views

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 ...
3
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1answer
120 views

Is a newly installed server with no services running (but connected to the web) at risk?

A new server has just been installed but literally has nothing else running on it, no services setup to SSH in or anything yet (it's a Linux server). However, it is hooked up to the web so I can ...
3
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3answers
138 views

How to keep logs safe from attackers?

I have a Linux server equipped with some security apparatus to prevent unauthorized access. Hopefully, this will prevent intrusions, but the possibility always exists. Naturally I keep logs so that ...
0
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1answer
361 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 ...
0
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1answer
189 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 ...
6
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1answer
2k views

How can one create one's own anti-virus scan server at home? [closed]

I suppose that every one used a service such as virustotal.com, anubis.iseclab.org, or any other service that could provide the same objective to scan same files. So my question is how can I make ...
1
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1answer
91 views

Solutions to decrypt data on access

I want to store sensitive data on on my (public) linux server. Also, I want to be able to access the data from different locations and different OS without much hassle. I thought about using a (simple)...
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2answers
234 views

Is VM per service a reasonable server security model?

Let's say I am hosting several services on my server, for instance, email and a web page. I am concerned that the web server software may have unknown vulnerabilities in it, which will allow an ...
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1answer
287 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 etc....
3
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1answer
141 views

Where to start , secure an AWS Ubuntu 14.04 [closed]

Ok so this is probably a basic question but I would like to expand my knowledge. I have created an AWS Ubuntu EC2 server. I am running software on the server that provides 2 services , firstly a ...
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0answers
77 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 ...
1
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0answers
131 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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2answers
118 views

security concern of user submitted bash command

Recently I am building a web service that user input will be used to run a bash command on the server side. What are the security problem I need to take care? Right now I find one that user could ...
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2answers
77 views

Server Files Got Exposed, What Security Steps Should I Take? [duplicate]

so I made a script that would accept a GET request through a script on my page download the url in the GET and then echo the response. Sort of like an in browser proxy. Basically someone found out ...
7
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3answers
3k views

Setting up a security CTF server

I'm looking for resources and information from people who have experience running hacking capture-the-flag challenges. To sum it all up in a simple one-sentence question: How do you set up a server ...
1
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1answer
121 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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1answer
446 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: text/...
7
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1answer
467 views

Are these SSH passwords of hacked servers?

I have been seeing persistent SSH connection attempts on my computer from a familiar IP address. I got curious and decided to do some Googling on the IP address. Turns out that someone from Indonesia ...
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1answer
46 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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1answer
90 views

Known Windows vulnerabilities vs actual exploits on Microsoft's websites?

Although some of Microsoft's servers are running on Linux, at least half is running Windows Server of some kind. I'm trying to understand how with so many unpatched and unresolved vulnerabilities in ...
0
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1answer
4k 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 ...
1
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1answer
154 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 ...
5
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2answers
217 views

Could a fake tip that my server is compromised be a social engineering attack?

A little while ago I got the following email from an unknown party (using an @alum.cs.[redacted].edu email address): I'm seeing attack traffic from your Linode. Just a friendly heads up that its ...
0
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1answer
111 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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1answer
25 views

Usage of Domain from one server to another [closed]

Just want to ask if anyone have an idea about how to do this. I'm using a domain lets call it mymaindomain.com to connect to my Main Server, now I have a second Server that uses mysecondomain.com Is ...
0
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1answer
132 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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2answers
193 views

Stop POODLE vulnerability in Oracle Application Server

Our Enterprise is using Oracle Application Server in front of Oracle database. We are using Oracle wallet manager(Installed with Oracle client 10) to create self-signed certificates. As you may know ...
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1answer
133 views

Emulating Client by sending encrypted hexdump to dB server and getting response back [closed]

So I used wireshark to retrieve a hexdump that has been encrypted with RSA. I need to figure out what the response to that would be when it comes back from the server. How I imagine it would work is:...
5
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1answer
231 views

What is investigated after a possible hack on servers?

My question follows recent news of the Sony hacking incident. I was wondering what type of investigation is conducted by a security firm or the FBI. For example, if the network servers were hacked, ...
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5answers
1k views

What Man-made Physical Threat Could Pose Severe Danger to a Server Farm?

I am writing a novel in which a researcher attempts to work against a study he is a part of by purposely sabotaging operations on the research compound. I am wondering if the following is plausible. ...