The Domain Name System (DNS) translates Internet domain and host names to IP addresses.

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What are the risks of removing ISATAP from the default global block list?

The process of installing Microsofts pseudo VPN called Direct Access requires me to remove the ISATAP name from the default global block list by running this command: dnscmd /config ...
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53 views

NMAP DNS Resolution

By default NMAP does reverse DNS resolution for a given IP which responds to the host discovery probes. My question is, what are the benefits of getting the host name when performing a network scan?
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Using DNS to track browser activity on a LAN

I am trying to create a small network auditing script that tracks HTTP and HTTPS domain names visited by certain hosts using the libpcap wrapper for Nodejs. At its best the script would be able to ...
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185 views

What can my university see by installing a CA root certificate on my computer, even when I'm using a VPN?

To use the wifi at my university, you must install a CA root certificate by them. In my case, I am using a Mac computer with a VPN installed. I'm curious, what can they see me do on my computer by ...
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762 views

Way to make “DNS unblockers” safe?

Many people who live outside the US use "DNS unblockers" such as Unblock-Us to access region restricted services such as Netflix and Hulu. My understanding of these services is that for DNS requests ...
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Network enumeration protection [closed]

I was reading about DNS security, and readed about Zone Transfer and how can be used to retrieve host information of a network, so not allowing Zone Tranfer from external sources will be the solution ...
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Anyone out there using Umbrella from OpenDNS? What exactly is it?

I'm still looking for a centrally-managed AV/malware management system and I've been testing out both Panda and Webroot (due to their 'cloud-based' structure that doesn't require a server for me to ...
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116 views

Using free subdomains to circumvent web filtering systems

(I was told that this was the place to ask this by someone from Webmasters, if I've got it wrong again please give me a chance!) I'm running a personal proxy service for the use of myself and some of ...
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216 views

DNSSec vs SSL and IPsec

Theoretically, DNS cache poisoning shouldn't matter,because everything important is protected by SSL and IPsec. So why DNSSec was developed? Aren't the first two protocols sufficient?
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Root/Naked domain and DDOS

Some services like Github has DDOS mitigation measures for their root/naked domain, but not other subdomain(s). What so special about the root domain concerning the DDOS attacks? [1] ...
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How do big companies ensure that other people don't register a new top level domain with their name?

For example today there are ".codes", ".farm" and ".vaijes" newly available. How do big companies like google, facebook, twitter, .. keep sure that they are the first who register their name on the ...
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183 views

DNS zone size overload?

Is it possible to DOS DNS by creating custom dns zones with lots of text records in them so that the size of the DNS zone is in the order for example 100 Gigabyes, and then query all the dns records ...
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354 views

Proxy aware or DNS capable meterpreter?

I'm having issues traversing a proxy protected network and was wondering if there are meterpreter implementations which allow proxy awareness (automatically using windows AD credentials) or which can ...
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326 views

Following redirects from HTTPS to HTTP - Secure?

So I have an HTTP client which supports HTTPS. However, it doesn't follow the HTTP spec recommendation for redirects on POST(which is to ask the user before redirecting) This means, in theory, if you ...
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682 views

Should Windows 2008 R2 be used as an externally facing DNS name server?

When compared to more traditional DNS name servers, what are the benefits / drawbacks of using a Windows 2008 R2 as a public ns record for a company. What limitations, or security issues would I ...
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70 views

Is DNS secure when using DNS crypt?

Is it the same security level like a VPN DNS wise when using Open DNS crypt servers plus DNS crypt proxy? I installed both packages in Ubuntu and now unless I have the right IP entry in the network ...
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DNSSEC Why are RRSIG return in the Answer not Additional section

Looking at Wireshark traces of DNSSEC responses, I see that the RRSIG is returned in the Answer section, even though it wasn't part of the query. Why isn't it returned in the Additional Section, ...
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What are the pros and cons of using DNS to block unwanted domains?

There are many methods to block unwanted outgoing requests. Examples include browser settings and extensions, and .hosts files. While DNS blocking won't affect direct accesses to a numeric IP address, ...
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107 views

What types of attacks and abuse does DNSSEC protect against?

I've read lots of different articles on what DNSSEC is and that it provides authentication for DNS. What I unfortunately haven't seen is a good description of the types of attacks and abuse that ...
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How Fast Flux technique works exactly?

I was reading about botnets and C&C servers and saw this term. I've read this Wikipedia article but I couldn't really understand what and how this is working. I think its some kind of proxy ...
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Is it possible to redirect someone to a fake site without changing the hosts file?

Is it possible to redirect someone to a fake site without changing the hosts file? When I access a bank site, I receive a fake page. But my hosts file does not have any changes to do this. Is it ...
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197 views

Security risk with using internal IP on public DNS

A web server inside the office network which is accessed by staff internally and the internal DNS resolves web.company.com to the server's LAN IP. Publicly, company.com nameservers belong to their ...
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Wildcard DNS entry from a security PoV

We are going to release our new product which will have customers create their own subdomains. This requires having a wildcard DNS on our main domain (We have no other options, right?) Are there any ...
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954 views

DNS settings compromised from WAN on Edimax ADSL router

My home network Edimax AR-7084gB ADSL modem/router with firmware verison 2.9.5.0(RUE0.C2A)3.5.18.0 was exploited from WAN few days ago. The attacker changed DNS server settings - primary server to ...
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DNS causing SSL errors

On my old ISP's DNS servers, sometimes https://www.facebook.com would return a cert for Akamai instead of Facebook. What I don't understand is that changing my DNS server to Googles (8.8.8.8) fixes ...
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164 views

DNS queries to compromise DNS cache

The transaction ID for DNS queries can take values from 1 to 65,536 and my computer pseudorandomly chooses one for each DNS request. If I sents 1,024 false replies per request, how many requests ...
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656 views

Clear the DNS server's cache?

Is there anyway for the attacker to clear the cache of a DNS server in order to poison it? For example, if someone attacked my DNS server in an attempt to spoof Google.com, they will receive the ...
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Manual DNS change

If I manually change my DNS setting in the router or in Windows settings from the provider's one to, say, 8.8.4.4 by Google - will it mean that my ISP has no idea which sites I am going to? Maybe it ...
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Is it safe to use namebench?

As the title states is Google's namebench utility safe to run on my Mac and let it use Safari's web history?
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DNS query through squid? [closed]

My IDS picked up our squid proxy server doing a dynamic DNS request. I wasn't aware squid passed DNS requests from the client to the internal DNS server. Is this possible? Snort Alert: ET POLICY ...
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Reliability of DNSBLs for Stopping Forum Spam

I know that certain DNS blacklists are considered more reliable than others, in that they don't have as many false positives. I run a forum that is known to be spammed, and I've installed a mod to ...
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Are IPs and domains in malwaredomainlist.com compromised?

I did an nmap scan on a website that is being hosted by a hosting company. The results showed a rDNS record with an ip and a domain name. When I googled the domain name it appeared in ...
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Does DNSSEC still have the “enumerate all names in zone” problem?

According to Wikipedia: DNSSEC introduces the ability for a hostile party to enumerate all the names in a zone by following the NSEC chain. NSEC RRs assert which names do not exist in a zone ...
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Firewall egress filtering by domain

In our production environment, we are connecting to a few core external service providers though their APIs and are required to have all other services blocked (PCI DSS). We currently have a firewall ...
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Why would home routers accept incoming DNS traffic?

I stumbled upon an interesting paper (PDF Link) where researchers found out that more than 58% of the DNS open resolvers that are blamed in DDoS attacks are in fact home routers distributed by ISPs to ...
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Does DNSSEC provide signed statements that a certain domain does NOT yet support DNSSEC? If not, why not?

In my security class with David Wagner, we talked about some of the reasons why DNSSEC is not widely adopted right now. One of the reasons was that for backward compatibility reasons, clients need to ...
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RHS Blocklist, Other blocklists and impacts of RHS blocking on similar domains

I am not very familiar with Blocklists so had a few queries around it. I have a sub-domain example.com which is used to send mass marketing emails i.e. emails are sent from no-reply@example.com. A ...
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Is OpenVPN secure in this way?

I'm familiar with OpenVPN because my home router has a builtin OpenVPN server. I would like to use OpenVPN all the time, but how do I deal with situations where I don't own the routers? ex.: in a ...
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Is my service provider hacked and what can I do to protect myself?

I found myself looking at a stock and forex search page when I try to access Chinese Stackexchange using my FireFox browser today. This is what the page looks like: And this is the HTML of the ...
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Unpublished server

Is it possible to setup my web server such that only certain sources can access and the public from internet has no access? i am thinking that we could just not publish our web server URL/IP to our ...
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Broadband security question

I have a fixed line broadband connection at home. This morning when I tried accessing Google or Facebook through my browser (Google Chrome) I got a webpage asking me to update my flash player. I found ...
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Is OpenDNS safe to use?

Anyone know anything about OpenDNS? Is it safe to use, or should it be avoided? If it should be avoided, what are the alternatives? I am basically looking for a way to block certain sites from my ...
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tor and widecap dns leak

I am using a program that I coded in C#. All it does is use HttpWebRequest to request some pages and read info from them. I tried running it through Tor. I installed the Vidalia Bundle and Widecap. My ...
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Masking IP address and port number for Web application [closed]

I have a Web application running on port 89 ( non-standard port) of a Windows 2012 R2 machine. The login page for this application needs to be accessible through a link on my website - let's call it ...
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What is same site scripting and what are some exploit scenarios?

I know it is an issue with how DNS is configured , but is it really dangerous if the attacker couldn't access your network?
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How to test for zone transfer? [duplicate]

I heard that it is possible to test for zone transfer attacks on a web application using host and dig commands in Linux. How it is done?
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How would I secure my hosts file?

I know the hosts file is often deemed obsolete by an actual DNS, but what is/are the best way(s) to secure a hosts file (Current Best Practice)? Example: Would I delete the hosts file, input known ...
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780 views

DNS Cache Poisoning as a Foil to SSL

I recently learned a bit more about DNS cache poisoning, and my understanding of the basic way it works is by editing the DNS cache so that when the victim types in, say, www.google.com they get the ...
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Can Tor browser bundle be attacked like this?

When using the Tor browser bundle, you load the check.torproject.org on start. It tells you when there is a security update to downloads, and let's you click a link to get it. The way for users to ...
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How CDN operator will decide content fo me if i am using google public DNS [closed]

As i saw most of the internet is being load balanced even at DNS . And DNS load balancers takes decision on behalf of client's DNS . So I Am just curious to know if i will use 8.8.8.8 as nameserver in ...