Network Security - securing network infrastructure and connections

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3answers
133 views

Decrypting SSL over a Mobile Network

I work for a large company and we are trying to judge the safety of some proprietary information that is being sent and received in a new application we are developing. After our initial testing we ...
0
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0answers
60 views

Is WPA practically less secure than WPA2 only if QoS is enabled?

I've been looking into attacks that are effective against WPA-TKIP but not WPA2-AES (both using PSK). I've found Vanhoef & Piessens's paper that builds off an attack by Beck & Tews and can be ...
14
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2answers
960 views

What's the diff between blocking a port with a firewall and not starting a service on that port in the first place?

I was considering setting up a software firewall (pf) on my web server and did some research on them. Were I to do it, it'd involve basically blocking connections to all ports except 80, 443, and the ...
0
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1answer
49 views

Segregating network systems and functions [closed]

I want to segregate network systems and functions so that if an attacker hacks in one area, he can't necessarily reach others. What should be the recommendation when information from one network is a ...
3
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1answer
143 views

Securing my network: unmasking spoofed mac possible?

In Kali you can: airmon-ng start wlan0 ifconfig mon0 down macchanger -r mon0 (-r changes mac id to a random number) ifconfig mon0 up This attack for example: aireplay-ng -0 2 -a [ap mac #] -c ...
47
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6answers
17k views

What techniques do advanced firewalls use to protect againt DoS/DDoS?

It is hard to protect a server against Denial of Service attacks, DoS/DDoS. The two simple ways I can think of is to use a server with much resources (e.g. CPU and memory), and to build the server ...
1
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1answer
197 views

Security criteria for selecting a network switch?

I am looking to purchase a switch with 24+ ports. The set of security criteria that I should bear in mind when selecting a switch is not clear to me. I have tried to take other networking security ...
1
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1answer
62 views

How safe are networking ACLs based on IP-address?

As far as I know, a determined attacker would have no major issues in hacking the IP address of the packets contained by his (web) request. Therefore, I cannot see how an Access Control List (such as ...
1
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2answers
167 views

In detail, how does SSL offloading/acceleration/termination work?

What is the in-depth working mechanism of SSL offloading/termination? I could not find literature that would dive deep enough into the subject. Assume the following example, where a intends to ...
1
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0answers
74 views

Two similar computeres on same network, different traceroutes (one slow - one fast) [closed]

My SO's computer has a very slow internet connection. So I compared her traceroute to xkcd.com with mine. We are on the same network, on both on os-x. It's a simple 4g home router. tracerouter ...
0
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1answer
73 views

Why do private networks use both X.509 and User/Password authentication

For example, the school network I am on requires both a name & password to log in along with having its X.509 certificate installed in my browser. Why does it need both? Shouldn't name and ...
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3answers
103 views

Can the packets of a wireless network be sniffed by a user who is not present in that network?

1.If an user knows the frequency used by a wireless network, is he able to collect the packets from that network? Those packets may be encrypted, but can he collect those packets? 2.If the user has ...
71
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6answers
72k views

What is the difference between SSL vs SSH? Which is more secure?

What is the difference between SSH and SSL? Which one is more secure, if you can compare them together? Which has more potential vulnerabilities?
0
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1answer
91 views

Compromised submarine cables and the consequences to internet?

I recently read an article that Google wants to build a submarine cable connecting to my country supposedly to increase overall speed and while I hope my government will never allow this kind of thing ...
2
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2answers
2k views

hide dhcp/ip request, traffic under lan router

I have a question on the following scenario: Lets say, we have a normal LAN network with 192.168.1.1/24 gateway, DNS, DHCP servers all running on 192.168.1.1 ; There is only one client: ...
8
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1answer
667 views

What are the main issues and best practice security controls when exposing SIP and H.323 to the Internet?

What are the main issues and recommended controls when exposing SIP and H.323 to the Internet (could be for voice, video, and instant messaging traffic or all three)? Specifically I'm looking for ...
32
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3answers
5k views

What is the best home wireless network encryption algorithm to use?

What is the best home wireless network encryption algorithm to use? I realize the best answer will probably change over time, and hopefully people can provide updated answers as new standards come ...
0
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1answer
108 views

Puzzle: network intrusion or OpenDNS/Disconnect.me collision?

My home / home-office network uses OpenDNS as a content filter. As the OpenDNS admin, I received a "User wants access to..." email indicating that someone tried to access a blocked site and requested ...
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1answer
11k views

How to get a Network's WIFI Password through CMD? [closed]

I found that Wifi's Password can be retrived using the network and sharing wizard in Windows, And Technicaly theres no way to store Passwords/collection of bytes in the memory after switching/shutting ...
1
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2answers
101 views

Am I exposing my application to IP address forgery / ip spoofing?

Here is my setup: I will create two REST services that are run on Server B and should only be called from Server A. Both servers are on the same network and I am not able to configure a firewall to ...
1
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1answer
52 views

How do you practically manage your never-use-personal-accounts-on-a-work-machine-ever double life, when your personal machine is a limited iOS device? [closed]

This is follow-up to Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace? The answer to that question is Follow company security ...
2
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3answers
158 views

Parallel systems, in case any of two has known exploits

As software becomes more and more complex it's harder and harder to keep it secure down the entire line. Discussing this problem with a friend we were opting some pretty extreme solutions and wondered ...
0
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1answer
92 views

Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace?

I have just started interviewing for new computer job after years of working from home. At home I feel very secure with how I protect myself from data loss and keeping my secrets secure. I backup ...
1
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2answers
191 views

Is a sensitive NAS behind a router safe?

I have four pcs connected to a switch connected to a router that gets connected directly to the internet. How safe is a NAS attached to the same router along with the switch plug? I'd like to have ...
13
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5answers
15k views

Why is WPA Enterprise more secure than WPA2?

In personal mode WPA2 is more secure than WPA. However, I have read that WPA Enterprise provides stronger security than WPA2 and I am unsure exactly how this is achieved.
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4answers
1k views

Verify Mac firmware is not hacked…how to do?

I have a late model Mac computer. I allowed someone to plug in a USB drive, and my network activity changed afterwards. Normally, Little Snitch will report every app that uses the internet. Every ...
3
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1answer
280 views

Sticky keys on RDP

A recent report on page 18 states that: [black hats] have even leveraged [systems administration tools] as a means of maintaining additional persistence via setting “sticky keys” for RDP sessions. ...
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3answers
69 views

What Mechanisms Keep Network Processes (and Applications) Sandboxed

This question stems from my other question, sorry if it is too similar. Now I would like to know what mechanism is used to sandbox network processes and (if relevant) individual programs, if at all? ...
1
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3answers
95 views

What security implications are there when sending video feed over unknown applications, and how can we protect ourselves?

This might sound broad -- but it has to be considering the details are truly unknown. Context: Our university (and many more) have begun rolling out mandatory webcam recording for certain portions of ...
-1
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2answers
669 views

How to make Reaver crack WPS faster [closed]

I have Reaver 1.4 on Ubuntu 14.10 with a Realtek RTL8187SE B/G adapter and it takes almost 5-10 minutes to get from 0.01% to 0.02%. I always have my TX-Power at 30 when I use Reaver, the network is ...
3
votes
1answer
184 views

Is it possible to retrieve SSH v2 credentials in a username/password authentication scheme?

I'm currently analysing a compromised network(root access has been gained to a workstation and logs show that it has been used for port scanning and service brute forcing attacks on the remaining ...
1
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1answer
216 views

How can I convert a Windows certificate into a PEM format, that includes the chain + root?

I need to import a certificate into a Cisco Ironport for Web SSL inspection. The only input format supported is PEM. Based on my research the PEM format does support all certificates in the chain, ...
5
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3answers
689 views

Organization like OWASP for network security?

Is there something like OWASP for Network Security ? Or have anyone of you come across a testing guide for network security, as to how to start an audit and then the minimum number of tests to run ...
2
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1answer
51 views

Spoofing of Server Sent Events

In the spec for Server Sent Events, it says Authors should check the origin attribute to ensure that messages are only accepted from domains that they expect to receive messages from. Otherwise, ...
16
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3answers
1k views

What techniques and tools do you use to relate security events?

You have central logging going, detailed app logging/alerting (e.g. modsec), network based security alerting (e.g. snort), and whatever else feeding your observation deck. Do you have any cool ...
3
votes
1answer
198 views

Can a Windows or Linux password be brute-forced on a public network?

I am at a hotel that has a public network. I have a Windows machine with a wired connection to it. "Network and Sharing" has network discovery on. No folders are shared except "Users", which is shared ...
2
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4answers
81 views

Find the destination script of an inbound TCP connection on our shared webserver

We have a shared webserver which is being monitored constantly by our ZABBIX agent. On some hours of day we have unusual TCP traffic on port 80. Lets say we have over 400 connections from IP address ...
32
votes
4answers
5k views

Is there any meaning in only allowing port 80 and 443 today?

It's become standard fare for security minded organisations to block everything other than 80 and 443. As a result, more and more applications (other than web browsers) are learning to use these ports ...
1
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4answers
5k views

Ignoring broadcasts to 10.0.0.255 using iptables

I'm trying to drop logging packets that are destined for 10.0.0.255 by using the following rules: $IPTABLES -A OUTPUT -d 10.0.0.255 -j DROP $IPTABLES -A FORWARD -d 10.0.0.255 -j DROP It ...
2
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2answers
127 views

Connecting trusted and untrusted networks

We have two domains that are isolated. First domain is the Corp LAN, the second is an hostile untrusted network with untrusted clients that could contain malware. Clients on the untrusted network ...
-4
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1answer
120 views

How The Sony Hack Was Traced, and So Quickly? [closed]

What are the steps that are required to locate a source that have routed their traffic through multiple zombie hosts, spanning multiple networks/carrier/nations?
0
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2answers
108 views

Only HTTP(S) port is open. Why do I need to worry about unpatched software?

Unpatched software poses no risk by themselves. They're only problematic when someone exploits it. How could malware get into my system if I do have unpatched software in general and I'm connected to ...
2
votes
1answer
202 views

Are COMET installations immune to “Slow TCP Reading” DoS on Windows? (Such as SignalR or WebSync)

My understanding is that COMET implementations of WebSync and SignalR do not directly use IIS and are a few layers lower on the ISO model. After reading Qualys's blog regarding slow TCP reading, I ...
0
votes
1answer
149 views

Why is browsing while logged onto a VPN from public wifi more secure than not?

I've been trying to wrap my brain around VPNs for a while now, but can't find a good source that answers the questions I have. In particular, I can't understand why browsing from a public access ...
2
votes
1answer
134 views

DNS Cache poisioning examples, or other criteria when a client ignores a response

Is there a concise set of rules that describe what 99% percent of DNS responders accept? Conversely, are there are set of rules that define when DNS queries are invalid? I would think that the ...
0
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3answers
149 views

How are computers identified across networks?

IP addresses are assigned to computers when they connect to the internet and change depending on your location. However, I read that your computer also has an address that doesn't change. So, when ...
37
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9answers
18k views

Are powerline ethernet adapters inherently secure?

I have 2 Zyxel PLA407 powerline adapters. Router is downstairs connected to one adapter, other adapter is upstairs about 30 feet away connected to a desktop. I have a house, not an apartment or ...
1
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2answers
538 views

When do I use IPsec tunnel mode or transport mode?

I basically understand how tunnel mode and transport mode works, but I don't know when I should use one instead of another. Among the two parties who want to communicate, if one computer B doesn't ...
4
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2answers
159 views

Is HTTPS redirecting to HTTP a vulnerability?

Let's say a user is authenticated, and the entire account authentication process happened under secure HTTPS. Upon successful login, the user is redirected back to the homepage. However, the homepage ...
2
votes
1answer
93 views

Does having a VPN service mean accessing my email etc. over public free open WiFi mean I have security/privacy? [duplicate]

Is my information secure over public WiFi if I use a VPN service? i.e. protection of emails and login details.