Tagged Questions

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

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0answers
26 views

How can I Run my Kali Tools on a Remote Server

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
8 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
43 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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6answers
2k views

Is it fundamentally possible to validate that an unmodified version of your client connects to your server?

I'm cross posting this question from Programmers.SE because I think it's equally on-topic here and would like to pose the question to this community as well. This seems like a programming question ...
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1answer
99 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
55 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
91 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 ...
2
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0answers
61 views

Ubuntu server seems compromised for a DDOS attack [duplicate]

So 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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1answer
55 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 ...
3
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1answer
145 views

Securing server to server http communication

We are trying to come up with a scheme to secure http communication between our internal servers. Are there any good established schemes out there? The requirements we have are: The clients and ...
2
votes
1answer
81 views

OpenVPN: Storage location and creation of keys/certificates?

I am re-setting up some OpenVPN infrastructure to be more secure than the original and wanted some guidance. It's noted that the best security policy is to keep the Certificate Authority (CA) offline ...
1
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1answer
48 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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2answers
99 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 ...
0
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1answer
217 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
vote
1answer
82 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 ...
2
votes
1answer
75 views

How to deal with misbehaving clients on an authoritative server?

My coworker and I are developing an authoritative server for an MMO. We can't agree on how to handle "misbehaving" clients. Misbehaving, in this case, means clients who send "odd" requests that might ...
1
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1answer
89 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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1answer
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 ...
0
votes
0answers
185 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 ...
2
votes
1answer
213 views

Bastion host that allows jailed users to SSH but protects private key

Basically, I'm trying to let the user use a private key without having read access to it. Use case: Employee needs to SSH to a server in the data center. There is 1 private key for all servers, ...
0
votes
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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3answers
131 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 ...
0
votes
1answer
61 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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1answer
165 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 ...
1
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1answer
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 ...
1
vote
1answer
52 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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votes
3answers
226 views

What is a good source for hardened base configurations

I attended B-Sides in Orlando FL where one of the speakers had mentioned a site which contains hardened configs for popular services such as apache and postfix. The author of these configs is ...
6
votes
1answer
164 views

How important is a mysql password for localhost?

We can assume that if an attacker gained access to a web server running mysql that they would be capable of reading the scripts to determine the mysql password. If mysql only responds on localhost, ...
1
vote
1answer
93 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 ...
0
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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 ...
1
vote
4answers
106 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 ...
0
votes
1answer
180 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 ...
1
vote
3answers
94 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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vote
2answers
192 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 ...
8
votes
1answer
3k views

Check logs for Heartbleed exploit use?

According to articles such as the following, it's apparently possible to check logs for heartbeat requests matching the payloads described in the Heartbleed exploit. Is this something that any server ...
3
votes
3answers
193 views

How do I store a user's secret key on a server?

I'm learning about security at the moment and one thing I'd like to try out is having a key server distribute keys to clients that will allow them to securely save and read data locally. My basic ...
1
vote
0answers
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 ...
1
vote
1answer
175 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
89 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 ...
0
votes
2answers
163 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 ...
1
vote
1answer
123 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 ...
1
vote
2answers
120 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 ...
8
votes
1answer
290 views

What is the difference between HSM and Key server?

As per PCI-DSS requirements, we have to use either HSM (Hardware Security Module), or Key Server to store the KEK (Key Encryption Key). If I'm storing encrypted DEK (Data Encryption Key) in an App ...
0
votes
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 ...
4
votes
3answers
93 views

Will sabotaging a shared web hosting account threaten the security of sibling accounts being that they are shared on the same server?

Will sabotaging a shared web hosting account threaten the security of sibling accounts being that they are shared on the same server? Whether it it be through htaccess setups, posting login ...
2
votes
2answers
117 views

How to find out the email host of a vanity email address?

Assuming a person gets his own domain address, say, theperson.com. He then goes on to create a vanity email address with that domain. e.g. me@theperson.com. me@theperson.com may be hosted by the ...
2
votes
4answers
249 views

What are the arguments for and against having anti-virus on domain servers

I have been hired at a start-up where I seem to have become the de-facto admin despite being hired to do application support (to be fair I do have a background as an all-rounder). Amongst the ...
0
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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?
2
votes
4answers
380 views

What's the best way to secure inter-server communication for cloud servers?

I'm looking for best-practices or suggestions to secure inter-server communications between VPSs. Should I just run all traffic through SSH? What about HTTP Traffic via something like mongo? ...
2
votes
2answers
326 views

Are there any logic-bombs that execute when the file is deleted?

I want to delete a suspected malicious file from a server. For the purposes of this question assume that the infected machine is Windows Server 2003 or later. Is there any risk in deleting such a ...