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

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How can I detect/withstand DNS amplification attack?

I am a developer, and I am trying to get an insight into what could I do to enable my application to withstand a DNS amplification kind of attacks. Would such prevention methods help against DOS type ...
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257 views

Kaminsky Bug Exploitation

I am trying to exploit the Kaminsky bug for a school assignment. The specific version of the bug that I want to exploit is sending a forged packet with false information about www.domain.com so that ...
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How dangerous is it that there are DNS entries for our domain that we did not register?

I was performing an DNS brute-force on our company's domain and found entries like "html" "ww" and "wwww" resolving to IPs outside of our registered block. This sparked a debate about just how ...
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What risk do International Domain Names (IDN) pose?

I understand that IDN's are basically a GUI display change for domains that have a prefix of "xn--". What should I advise companies do in regards to these domains? For example, should companies ...
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Why would you want to run DNS servers externally?

Something that's never made much sense to me is when environments have DNS servers which are publicly accessible (on the internet). This more often than not seems to leave them vulnerable to Cache ...
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Is it harmful to redirect web bugs to localhost on hosts file?

I was checking the article hosts file on Wikipedia, and I found this: Blocking access to servers of unwanted content by redirecting them to the local host (127.0.0.1) may have security ...
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How can I determine the domain controller when it's not in DNS?

On a penetration test going in blind for an organization, meaning no knowledge of network topology of design, no idea what the domain(s) might be, and domain controller is not apparent in DNS...how ...
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Is this a DNS attack?

The following graph shows the UDP DNS queries/sec (blue) and DNS responses/sec (red) of traffic passing a router over the preiod of 4 days. DNS query is a DNS packet with query/response flag set to 0 ...
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Implications of using DNS Forwarders instead of Root Hints

When redesigning an organizations DNS infrastructure, the question of using Forwarders instead of Root Hints comes up. What kinds of issues should I be aware of when the admins and designers start ...
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I just deployed DNSSec. Is there any benefit in DANE for a CA- issued Cert?

I just deployed DNSSec at https://val-id.com and https://getvalid.com Since DNSSec is a requirement of DANE, and I have a CA-based certificate, can I show my support for DANE-based deployments by ...
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103 views

How can I protect myself against DNS leaks?

As discussed here, a DNS leak is where DNS lookups ignore your current routing (in the example of a VPN connection) and still end up going out over your normal internet connection. This can ...
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When should a DNS entry be cached? What conditions should not be? How do I determine the TTL?

I'm writing a DNS resolver and am building a spreadsheet of when a DNS record should be cached, and not be cached... but it's harder than it first looks (to me at least). Is there consolidated test ...
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225 views

proxychains + dnscrypt + tor

I'm currently working in Kali and I'm trying to boost my security and anonymity online. Please, bear with me for I am no expert yet. Googling and searching here has yielded useful info but not enough ...
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Kaminsky Bug DNS Cache Poisoning

I'm trying to use Kaminsky DNS cache poisoning method. I'm using bind9 server on ubuntu and static port. So far I achieved to insert a line into DNS cache which is ;additional www.blalba.com 80000 ...
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What's stopping DANE? [closed]

As I understand it, DANE (RFC 6698) is a promising candidate for addressing issues with current TLS Trust Anchors (i.e. Trust Anchors). My attempt at explaining the issue: Currently, CAs are ...
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Does using Google DNS make extensions like AdBlock Plus useless?

As many of you probably do, I am not using my ISP DNS because of very low performance, and I am using Google's primary and secondary DNS (8.8.8.8 and 8.8.4.4) which are good speed-wise but, knowing ...
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To DMZ, or not to DMZ

So for an assignment, we need to create a scheme (and eventually also the set-up) of a couple of servers in a network. The 'networks' are: Internal network DMZ The internet And the servers we ...
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Does DNS pinning protect against all DNS rebinding attack?

I found an example of a DNS rebinding attack scenario in the paper "Dynamic Pharming Attacks and Locked Same-origin Policies for Web Browsers". Figure 1: An example of a dynamic pharming attack ...
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Alternatives for DNS resolution

I was told it's a good idea not to use your ISP to resolve DNS, both for privacy issues and because it can be slow. So I wanted to change, but I've read criticism on using OpenDNS (who makes money on ...
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How will users know if their session is DNSSec protected or not?

There is definite security value in having DNSSec-verified connections, however I have yet to see software indicate if the connection is secure. Ultimately I would like my users to recognize that ...
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DNS Spoofing vs ARP spoofing, the relationship?

As I understand, ARP spoofing can only be done on the LAN-side of the router? DNS spoofing, can that be done either side of the router? In order to do DNS spoofing, do you need to perform ARP ...
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How do I find all domains hosted on a single host?

I found several websites offer a function that allows you to list all domains hosted on the same machine, e.g you supply a.com, and it tells you b.com and c.com are both hosted on the same machine as ...
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Listing of DNS vulnerabilities

I am currently studying how to setup DNS servers and all aspects of the DNS system. I would also like to study the security aspect. I want to use current DNS server attack on my test servers. Is there ...
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Is DNSSEC immune to stripping signatures?

In my opinion, it should be possible to forge DNS reply so it doesn't include DS/RRSIG/... parts for any request, thus bypassing DNSSEC validation of resolved domain. Is DNSSEC system immune to this ...
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261 views

My DNS Name Server does not support DNSSec client queries, what alternatives do I have?

I am using a web browser to access DNSSec enabled sites. My current name server doesn't (won't) support DNSSec for at least a year. What are my alternatives? Do any ISPs currently offer DNSSec? ...
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Anyone use the International Domain Name (IDN) security mitigation API's? Is there a wrapper for .NET?

The International Domain Name mitigation API's are available here for download: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=ad6158d7-ddba-416a-9109-07607425a815&displaylang=en ...
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Are there DNS analysis tools that could detect bad DNS results?

Are there any tools (or at least methods that would work, if no free tools currently exist) which one could use to detect false DNS results? It would be very simply to detect an attack along the ...
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Can NSEC domain enumeration happen for zones with wildcard records?

In DNSSEC, NSEC records are used to provide proof of nonexistence. The trouble is that these records provide pointers to existent domain names (the closest known domain in either direction) ...
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How Do I Troubleshoot a Browser Hijack on a Mac?

My Mac is getting weird redirects with Safari and Chrome, however not with Mozilla Firefox. Since I cannot find software to do malware removal on Apple products or any good information, I am at a loss ...
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Does deliberately wrong information from a DNS server violate standards generally accepted good practices?

For certain host names my DNS gives me a wrong ip address (the ip address of a transparent proxy) for which inverse DNS look up does not give me back the host I originally looked up. This is related ...
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Is it less secure to use OpenDNS for banking accounts, SSH, Adsense account?

I have one WiFi connection in my house which I use for my iPad, phone and computers. I want to block adult sites, time consuming sites for every device that use the WiFi connection. So I came across ...
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How to determine if resolved ip is rogue or part of CDN?

I'm subscribed to goverment's owned ISP because only this ISP provides access to rural area. It has a bad reputation because it is not only redirects sites, but also injects JavaScript for ...
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How exactly would SOPA-style DNS blocking threaten the security of the Internet?

A point that keeps getting mentioned in the SOPA debate is that the DNS blocking it prescribes will cause security problems. Can somebody explain in simple terms just exactly how SOPA threatens ...
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Why is a separate reconnaissance server needed for DNS cache poisoning?

I'm trying to understand how Metasploit's DNS BailiWicked Host Attack module works. One of the required module options is a "reconnaissance" nameserver (option RECONS). What I understand from the ...
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Unecrypted connection to server - safe?

I am using heroku and cloudflare. I am going to release my website but I don't want do it without SSL. Now I always need an heroku addon to add my SSL certificates which costs $20/month. Cloudflare ...
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357 views

How does a client know that a DNS zone is DNSSEC protected?

Recently, I've been reading about DNSSEC and how it works. I found other questions and some very interesting answers on this and other websites related to this matter. However, I have a question to ...
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How does DNS Changer malware detection work?

This malware directs your computer to use DNS servers under control of the badguys. These DNS servers were taken over by the FBI. They were replaced with clean ones, to prevent service disruption, but ...
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Is a ptr mechanism in an SPF record secure?

If I understand http://www.openspf.org/SPF_Record_Syntax correctly, any machine with an IP that points to my-domain.com can send email as if it's from my-domain.com if I'm using ptr in my SPF record. ...
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Which is the best antidote for DNS cache poisoning?

I know some antidotes for DNS cache poisoning attacks, both simple as port randomisation, and more complex as DNSSEC. But, which is the more effective? Which solutions are really deployed in the ...
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I believe my Domain has been hijacked I am not receiving in sales in shopping cart

My IP address is 181.224.153.95 Domain: www.ashaybythebay.com FTP Hostname: m23.siteground.biz I added private domain servers to my domain name ashaybythebay.com and I see the two IP server ...
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447 views

captive portal wikipedia article

Something on the wikipedia page regarding captive portals have confused me: http://en.wikipedia.org/wiki/Captive_portal When a client requests a website, DNS is queried by the browser. The ...
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ISP glitch or a malware? Has this ever happened to you?

Brief background: I consider myself a relatively paranoid power-user, if not an absolute pro. I regularly update my AV and keep up with all the latest updates on my Windows7 machine. But what happened ...
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Blocking incoming traffic from privileged port (< 1024) to mitigate DNS DDos Amplification attacks

Hope someone can clarify. As I understand, in a DNS DDos Amplification attacks Multiple DNS queries are sent to a vulnerable name server with the source IP spoofed to that of the target server. The ...
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DDoS Protection for DNS providers

Zerigo, our DNS provider has reported to have been under heavy DDOS attack in the last 24 hours or so. Considering the distributed nature of DNS, and their architecture consisting of 5 main DNS ...
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Why isn't there a Global Root for SSL?

I was just wondering why there is a file on your computer implementing the trusted root CA's instead of something similar to DNS where there is a file on root servers that computers check against to ...
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Might Google log every website I visit using Chrome?

I wanted to start using Chrome for quite some time now, but I really don't want to tell Google about whatever sites I visit. So I was wondering if Chrome sends any data to Google telling them what ...
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what is the Akamai Name Server i see at some big companies

I have played with DNS a lot lately, and i have found that some big companies's web sites uses the Akamai NS as the Name Server for thier WWW servers, for example: $>nslookup > www.redhat.com ...
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Google DNS in Firewall logs

I was viewing my firewall logs and come across the IP 8.8.8.8. Further check reveals it belongs to Google DNS. And such traffic has been going out from some of our LAN segment PCs. From here on, how ...
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Is it a real security benefit if a host uses static IP Addresses for authentication?

As my knowledge about information security is not THAT good and Google did not give me a satisfactory answer I would like to ask the community here: I am working for a company offering online ...
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How does DigitalOcean DNS verify the owner of a domain?

Say you purchase a domain on Namecheap, but want to host DNS on DigitalOcean. DigitalOcean, says to simply tell your registrar to use DO's nameservers, then set up your DNS for that domain on DO. ...