Network Security - securing network infrastructure and connections

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What implications does IPv6 have for internet worms and script kiddies?

Though IPv6 is not here yet it one day we will all lose our familiar IPv4 addresses and be communicating over the internet solely with IPv6 addresses. What interests me is the implications this has ...
6
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2answers
327 views

Design proposals for enhanced security for parts of Internet, e.g. for banking?

There is some recent discussion of some sort of "multilevel" internet, with e.g. a level defined for banking in which access is only granted after special authentication with "true names", special ...
6
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1answer
1k views

Security Operation Center (SOC)

I am looking for resources and details on establishing a security operation center (SoC) or network operation center (NoC) based on ITIL or any other applicable regulations. Where can I find good ...
6
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3answers
427 views

How can an IPS be fingerprinted?

I'm not trying to solve a current technical problem but I came across this and have been wondering how it's done. Intrusion Prevention Systems are supposed to let all network traffic pass through and ...
6
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2answers
259 views

What tools are available for distributing and syncing firewall rule-sets to multiple devices?

I am looking for a solution to be able to distribute and sync firewall rule-sets to multiple devices. There are a few solutions out there such as Playbook by Matasano but it comes with an expensive ...
6
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1answer
3k views

Exchange of DEK and KEK (encryption keys) between app server and key server

In my application, it is required to encrypt a user's data before inserting it into the mysql database. I am using AES algorithm to encrypt the data using a 256 bit hash (and is calling it Data ...
6
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1answer
320 views

Epson Projector security threats

I have an EPSON PROJECTOR (model EB-824H) And I would like to use it in our company. As I know (but not sure) this kind of projector has no WIFI,no network card and there is no HD in this PROJECTOR It ...
6
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2answers
2k views

Strange STP traffic in my network, possible MitM attack?

I live at a student dorm, where we are connected to a student network. The administrators of this network have forgotten to disable STP broadcast on non-infrastructure ports. Periodically, I lose my ...
6
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3answers
599 views

wlan security - why is it not possible to protect against deauthentication flooding

Wireless security (Wikipedia) describes security issues due to the fact that wi-fi deauthentication packets are unencrypted: Weak PSK passphrases can be broken using off-line dictionary attacks by ...
6
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2answers
654 views

SSH Tunnelling: How can I stop users being able to access services bound to localhost via port forwarding?

I want to be able to offer ssh accounts on my linux server for people to be able to use for SSH tunnelling. All accounts will be locked down with no interactive shell, for tunnelling / port forwarding ...
6
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3answers
3k views

Can I block the true IP address using X-Forwarded-For header in IIS?

All the traffic gets to my IIS server through a proxy. I can't block or white list IP addresses because all the traffic comes from the proxy's IP address. Can I use the X-Forwarded-For header with ...
6
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1answer
1k views

Deploying a campus WiFi network that authenticates against an AD LDAP

We are looking to deploy about 15-20 Cisco 1131ag access points on campus. I have been reading up on different authentication methods, but I don’t know what will be the best long term solution that ...
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1answer
724 views

How to get hold of and use WPA session keys?

I'm testing sniffing and decrypting my WPA2 wifi network traffic. But when using airdecap to decrypt the capture file (created by airodump) using my WPA passphrase I only get broadcast traffic. If I ...
6
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1answer
1k views

DSL Modem Compromised?

Just found out that the primary & secondary DNS servers have been changed to 95.211.156.101 & 5.45.75.11. I had the following setup in place. MAC filtering and WPA2 for WiFi. ...
6
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4answers
654 views

Has my network/computer been breached?

I'm not sure if this is the right site to ask, so I apologise if it isn't, but here goes. A while ago I started noticing some odd behaviour. My Gmail account was compromised, it seemed, and I had to ...
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2answers
2k views

How bad is the leaking of Internal IP addresses through external DNS

If an external DNS server is leaking internal IP addresses are there any significant security threats associated with this information leakage? Apart from most the obvious - gaining an understanding ...
6
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1answer
3k views

Obtain credentials by spoofing WPA/WPA2 Enterprise network?

I have a large scale wireless network secured using WPA/WPA2 Enterprise authentication. Recently, I was made aware of the possibility that someone may use a dd-wrt router and a computer to spoof the ...
6
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1answer
2k views

How to create your own RBL DNS Blacklist to prevent spam

I am getting sick of reporting the same old chinese emails to Spamcop now and would like to make my own small RBL list that I can easily add blocks of IP's to. I have a spare PC and static IP address ...
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2answers
9k views

What is best practice for separation of trusted zones from a DMZ with a single firewall?

At our organization we have a single firewall sitting between our internal zones and the public internet. Currently all of our trusted zones are defined as different vlans on a layer 3 switch plugged ...
6
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2answers
167 views

Are temporary blocks sufficient response to network probes?

We have the option of using an automatic blocking feature of our firewall to temporarily block the source IPs of network probes. It is fast and automatic, and it expires after a set amount of time. ...
6
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1answer
761 views

I can receive all PADI packets for PPPoE connections of my ISP, is that a problem?

for debugging why my router wasn't connecting to pppoe i've tried to connect via the pc, it worked, then i started wireshark just to see what was going on, and i've seen that i can read all the PADI ...
6
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2answers
284 views

LTE networks and MITM

2G would leave you vulnerable to spoofed base stations. 3G tried to somewhat fix that using mutual authentication. Now, I tried to check how LTE handles this but I couldn’t find any usefull ...
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3answers
7k views

How can I keep a roommate from seeing my web activity?

I have a roommate who is a network security engineer and I think he hacked our home network and now knows what sites I am visiting and what I am doing online. Although he is not stealing anything I ...
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5answers
1k views

Is there a reason to disable root login, if SSH connections are restricted to a single IPv4 address?

I have a linux server running centos, and while hardending the SSH server, I asked myself: Is there a reason to disable root login, when only I (assuming my IP address is static, and i have direct ...
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4answers
728 views

What is War Dialing?

The topic says it all - I encountered the term in a PDF given to me. So ... what does the term/phrase 'War Dialing' mean?
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4answers
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Tips for a secure iptables config to defend from attacks. (client side!)

Own examples: ############### # KERNEL PARAMETER CONFIGURATION # PREVENT YOU SYSTEM FROM ANSWERING ICMP ECHO REQUESTS echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all # DROP ICMP ECHO-REQUEST ...
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3answers
3k views

Resolving an IP address of a Remote machine to its MAC address

I wanted to know whether its possible to get the MAC address of remote node (computer/Access Point) if I know its IP address. I have heard that if someone sends you an email (even through gmail), you ...
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7answers
2k views

What security risks exist in cell phone apps' data transfer?

Smartphones apps transfer various types of data over the provider's data network (or wifi, if enabled). What security risks are there in this transfer, and how can the risks be mitigated? I'm not ...
5
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4answers
169 views

software to keep a list of IP that try to access ssh over a set of rules and feasibility

i'm interested in software or set of scripts to keep a lists of filtered IP that attempt to brute-force ssh, and to label an IP as brute-forcing i would add some checks like: one attempt to log as ...
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3answers
8k views

How does “traceroute over TCP” work, what are the risks, and how can it be mitigated?

There is a utility called tcptraceroute, and this enhancement called intrace that is used just like a standard traceroute, but it works over TCP. How is the syn flag in TCP used to achieve ...
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4answers
5k views

Prevent network users from creating an unauthorized outgoing VPN connection to avoid network policies

Is it possible to prevent network users from creating unauthorized outgoing VPN connections to avoid network policies? Edit- What is the best way to detect unauthorized outgoing VPN connections while ...
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1answer
831 views

What is the value of encrypting a payload when it will be transferred over sftp anyway?

We have a integration arrangement to send content across the internet and the agreed protocol encrypts then sends it via sftp. What possible reason coould there be to encrypt the content twice? I ...
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5answers
4k views

What kind of attacks against home router's NAT do exist?

I always thought NAT was some kind of a security feature and I still think it is, because if it didn't existed the internet, respectively the clients behind NATs, would be even more insecure, since ...
5
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4answers
461 views

Is there a way to identify the host of a malicious VM from across the network?

Scenario: Someone is attacking your network. However, they're not exactly using their machine to do it - they're using a VM running on their system. The VM's network adapter is configured in ...
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5answers
500 views

Can hardware firewalls be infected?

If a computer is directly connected to the internet, it is vulnerable to attacks. So we attach a hardware firewall between the computer and the internet. But doesn't this new setup mean that now our ...
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4answers
1k views

Ways to monitor someone's internet traffic

If some authority for whatever reason decides they want to monitor your traffic on a wired DSL connection, how would they do it besides exploiting your OS? What are the other ways assuming the OS is ...
5
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2answers
12k views

What advantages and disadvantages do Palo Alto firewalls have, compared to others in the market

I am about to start an evaluation process for firewalls. I have experience with Checkpoint and Juniper, but I don't have any information on Palo Alto networks, other than their marketing stuff. So I ...
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4answers
1k views

Email header IP address

Do the IP addresses in an email header include information from the device from which the mail is being sent, or from the mail server?
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4answers
942 views

Persisting and comparing NMAP scans

Does anyone have any good recommendations on a good tool for persisting NMAP scans to database? It may be a tool for persisting or simply a java library for easy parsing of the nmap xml scan result ...
5
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3answers
5k views

Why do I need a firewall on my router?

I just bought a new router, and as usual the router manufacturer make a big deal out of the firewall. I have never understood why the firewall is needed, sure, stopping dos attacks (such as ...
5
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1answer
7k views

Are open ports dangerous?

I have forwarded port 80 to WAMPServer and 25565 to the MineCraft-server running Bukkit. (http://www.bukkit.org/) Am I vulnerable to attacks. Can hackers attack me if WAMP-server is running or if it ...
5
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3answers
695 views

Books on Cryptography, with a focus on application to Network Security?

Looking for some nice text books in the field of network security as part of my course. Our course covers mainly tls, ssl, pgp, smime, vpn, md5, hmac ....
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2answers
1k views

Snort Sensor Placement

I have a snort sensor monitoring some of my network being fed from a mirrored port. This mirrored session only monitors traffic between the firewall and peering switch. Since this just sees traffic ...
5
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3answers
1k views

Advantages of separating Web server from Database

What are the security advantages of installing the database of a web application on a server other than the one containing the web server?
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2answers
3k views

Is opening port 3389 on a router and forwarding this to a Windows SBS 2003 server secure?

I know of a company who has port 3389 open on their router and forwards this to a Windows SBS 2003 server. The server has the Windows firewall switched on, is patched and has an up to date antivirus ...
5
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2answers
8k views

Detecting the presence of wifi devices

Is it possible, with a normal wifi adapter, to detect present wifi devices in the surrounding? Let's say, is it possible to detect an Iphone with wifi switched on in the range of my wifi adapter? ...
5
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2answers
915 views

Is that possible? A router with arpspoof from factory

Just bought a 3G router from China and then checked the log: [1970-01-01 00:00:00] The system will be restored the factory value. [1970-01-01 00:00:00] The system current version: 1.0.5.1. ...
5
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3answers
450 views

Solaris: IP Spoofing Across Ethernet Ports

Given a Solaris machine with two network interfaces corresponding to the separate ethernet ports in the back. 0: 192.168.0.5/255.255.255.0 1: 192.168.1.5/255.255.255.0 with /etc/defaultrouter set ...
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5answers
13k views

Multiple VPN clients in parallel

If I were to run more than one VPN clients on my machine, simultaneously, what risks would be involved? E.g. are there technical conflicts, such that it wouldn't work right? Could there be ...
5
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1answer
489 views

How do you analyze an unknown network protocol?

Of course Wireshark can be used to sniff traffic - you can inspect each packet or chain of packets. But how would you do it smarter? Which tools do you use to identify behaviors or to automate the ...