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

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I think my server is under attack, what can I do to stop it? [duplicate]

Possible Duplicate: Invalid users trying to log in to my server I have a small ssh server mostly used for file sharing. A couple of other people and I use it and there are only 3 users. ...
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1answer
107 views

Client/server communication keystore and tls

I want to establish a client-server communication using TLS protocol. The point is I dont understand a few things since I don't know many oner security. I have created certificates for my server and a ...
2
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1answer
240 views

Remote Administrative Access to a server, KVM over IP or HP iLo?

We have a situation. We want to grant remote administrative access to one of our servers for clients. As I know, there are two possible ways: 1- KVM-over-IP and 2-HP iLO. The most important thing for ...
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3answers
2k views

Is it possible to upgrade the SSL version of a connection from the server's side only?

I am trying to find out if there's a way to upgrade the SSL version from SSLv3 to TLSv1 of a connection by only making server-side changes. In my case, both the client application and server are ...
2
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1answer
610 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 ...
2
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1answer
163 views

After having confirmed a computer is infected by a Botnet.

And having found a server IP that is controlling it. How can I find out the log-in credentials this client uses to log in to a IRC channel / server webpage / control panel. I have found out a python ...
2
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1answer
156 views

Forefront Identity Management Server Hardening

Is there a good document for hardening FIM? I've tried CIS and NIST, but I couldn't find anything. If there is no such document, what would I have to look out for in the configuration?
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2answers
7k views

How to set up a user-friendly NAS encryption?

We recently installed one NAS drive (Buffalo LinkStation Pro Duo, LS-WVL, running the most recent Firmware version 1.6 to be precise) in our (small) company network. Currently, there is no encryption ...
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1answer
80 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 ...
2
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0answers
48 views

How do I start securing a virtual appliance to avoid manipulation? [closed]

We have created an amateur software product related with monitoring and management of specific services. It has been made in Python and runs a web service as frontend to show the data in a nice way ...
2
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0answers
72 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 ...
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0answers
669 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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1answer
81 views

Can clients visit my site, and spam socket.emit(something); to my server, or is there some security behind socket.io?

I'm using Socket.IO and the client side looks like this. <script src="/socket.io/socket.io.js"></script> <script> var socket = io(); socket.emit("sendData", "hello!"); ...
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4answers
12k 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 ...
1
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1answer
136 views

Is nc -l unexploitable?

Suppose I want to set up a server as a test, and I want it exposed to the Internet, giving any IP access. It could be for any reason or no reason. I don't want it to be at risk of a buffer ...
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1answer
161 views

question on rooting

Rooting a server is done through uploading a shell on a target website and running a root exploit to gain root privileges on a server thus gaining access to sites that are hosted on that shared ...
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2answers
192 views

Using “Dynamic Hash Technique” to protect cookies from XSS?

This paper appears to describe a solution in which XSS attacks stealing cookies are made pointless by having the server send clients a cookie with a hashed name. Whenever the user sends the cookie ...
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1answer
178 views

Client vs Server security for business critical application (crossplatform)

We have the option to develop a software either based on Java (but then it is only available for desktop clients using Java SE and can run maybe also as tomcat app can be multithreaded, stable, ...
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2answers
359 views

best place to store backup encryption key [closed]

I have a server on which I keep an encrypted backup of some data. The server updates the backup once a day if the data has been changed and is physically accessible to many people. Further, I would ...
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1answer
379 views

Is it safe to use flex and bison as a protocol parser?

I started writing a a simple protocol lexer and parser for STOMP using flex and bison. Does anyone know of any security issues that might result from this? Edit: Added code. %{ /* Tokenizer for ...
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2answers
317 views

Good Practices to secure a Gaming Web Server, Memcached Server & MySQL Server

We have developed Game for Facebook platform. We have several Gaming Web Server, Memcached Server & MySQL Server. Here we have to work with facebook Payment API. We need to secure enough our ...
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2answers
73 views

Is using a sqlite with random name file secure?

As you know, SQLite have no security mechanism. My question is if i change the database file into some random name like '22OYIz23tmpyesTcMVFmw1tquFxzCIQD.sqlite' can someone exploit my database and ...
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2answers
409 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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2answers
85 views

Is a server absolutely safe if the attacker don't know unknown bug?

If a server installed all patches for known bugs and the attacker can't do a 0-day attack, then is the server absolutely safe?
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2answers
497 views

Why should web applications use multiple gatekeepers?

I have been reading a security checklist for web application design which can be found on: http://msdn.microsoft.com/en-us/library/ff648647.aspx One of the recommendations is to "use multiple ...
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1answer
729 views

Is server-side cryptography with user-only access possible for email services?

I came across the Lavabit High Scalability Writeup and got curious. Do you use any particularly cool technologies or algorithms? The way we encrypt messages before storing them is relatively ...
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1answer
192 views

Is it dangerous to allow clients to run JavaScript on a Server

On a webpage I have been working on, we can archive certain webpages for a user. The user can give an address and this webpage is than visited on the server and archived. Lately, I noticed that ...
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1answer
196 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://example.com/upload/RS=%5EADAJVxZ5NB.GMTgFV3EMEJX3sN22Jw- Note that my server doesn't have an upload folder inside ...
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3answers
526 views

Multiple SSL server certificates

I am sort of new to SSL. During a SSL connection establishment, I see that the server is sending multiple certificates. Can someone help me to understand why the server is sending multiple ...
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3answers
173 views

Is forwarding a port(s) a security risk to all computers on the network or just one?

I know forwarding ports can add some security risk, but if I forward a port to a computer, say running linux, would it add a security risk to all computers on my network or just the one?
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2answers
1k views

What security does an ISP provide for its customers?

I've heard that ISPs provide some kind of protection; using NAT and firewalls, to prevent hackers from using tools such as nmap to attack customers from over the Internet. What other technologies are ...
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1answer
313 views

How to verify data from localStorage on a server

This is a cross-post from my Programmers.StackExchange post - I think this might be a better forum to ask this question. Admins - please delete either of them as you deem fit. On my mobile app, I am ...
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1answer
63 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 ...
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1answer
73 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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1answer
497 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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2answers
177 views

Does where I put my PKI certificates matter?

I have an intermediate and a root PKI certificate that I see were already imported into a computers (windows server 2003) certificate store. However both the intermediate and root certificates were ...
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1answer
596 views

How does Java connect via SSL to a server without me providing any private/public key for the communication? [duplicate]

I am talking about server side auth only. Does Java create an internal self-signed cert for this communication? AFAIK from TLS protocol, we both need to create a shared secret, which is based on what ...
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1answer
110 views

Should statically-linked server binaries (daemons) be deemed more secure? [closed]

For a long time I've pondered this question. I am aware of the benefits and downsides of dynamic libraries (shared objects), including the infamous article by Drepper. All other things being equal, ...
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1answer
621 views

Certificate services will not start with “server is offline” error [closed]

I have a subordinate CA. The Enterprise root service was uninstalled from the network by accident and then migrated to a new box using the same key. This new server has a different server name. It ...
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2answers
108 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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2answers
63 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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1answer
686 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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1answer
118 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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1answer
19 views

Usefulness of Server's Work Load given Timing Attack Resistance of Responses

I've read articles in the past discussing the importance of having timing attack resistant responses for information where knowing the time for evaluation would leak information about the data being ...
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1answer
80 views

What Are Good Code Signing Environment Guidelines? [closed]

Take this scenario as an example: An organization has a few build servers that periodically check out source from a repository and builds everything. When a build finishes the binaries are code signed ...
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1answer
55 views

How to prevent a hacker from accessing other user's web dir

My website got hacked today :) The hacker accessed a website hosted by another user on the same server, then he got access to my /home/website-dir/ ! it's my server and I use it to host some websites ...
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2answers
115 views

Mobile Phone Client -> Server Authentication based on device

I have a mobile application (Android, iOS) and a server, which handles requests from the application. It is easy to perform standard authentication using SSL, password and random token to ...
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1answer
68 views

Preventing outgoing Portscan/SYN/UDP Floods in the datacenter

We are a VPS hosting company that have servers housed in a datacenter in Germany. Currently we are receiving multiple take-down requests because customers are ports scanning or attacking servers ...
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2answers
93 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 ...
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1answer
99 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 ...