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

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367 views

Should the email address in the SOA be used to validate domain control?

I'd like to validate the ability to own a DNS domain and am already considering validation that is currently in use by others such as Email validation of Whois contacts Access to the ...
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2answers
325 views

DNS access limitations

Im working on a script that's going to talk to a DNS on a LAN that have information about local domains. And I believe its blocking my requests. So my question is: How can you limit a DNS server to ...
2
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1answer
38 views

DNSCrypt-proxy: This certificate looks valid

I have just installed dnscrypt-proxy and dnsmasq with DNSSEC but I get a strange message in the logfile from dnscrypt-proxy. [INFO] + DNS Security Extensions are supported [INFO] - [dnscrypt.eu-dk] ...
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1answer
50 views

Fixing DNS leak - transparent proxy

My ISP is using a transparent proxy to intercept my DNS lookup requests when using VPN. Is there a way to prevent that? I am using Lubuntu if that makes any differance.
2
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1answer
56 views

Types of risks for my router

Recently I've read about viruses and worms that attack routers and do some nasty things, incl. DNS changes etc. In the beginning, I just read that some people have issues that their DNS server address ...
2
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3answers
170 views

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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2answers
643 views

What can my ISP see in their log files if I use Google DNS?

For example, if I use my ISP DNS and open this page they will see: http://security.stackexchange.com/questions/ask It would show up in their logs for sure. But if I use Google DNS, then what ...
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1answer
99 views

Abnormal SYN traffic from Blackhole DNS servers

I have been getting alerts from an anomaly based signatures for abnormally high SYN traffic. The traffic is coming from blackhole DNS servers. I hadn't had any experience with Blackhole servers prior ...
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1answer
103 views

Does any DNS Recursive resolver accept a “DNSSEC-only” option under DNSCurve?

I want to use DNSCurve (for privacy) to a trusted DNSSec resolver (for integrity), and want to ensure that I can tell a recursive resolver (like 8.8.8.8, or OpenDNS) that I only want DNSSec queries. ...
2
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1answer
161 views

Conversant, CNAME, Cookies, and PCI complaince

We have been asked to evaluate Conversant Tracking. http://www.conversantmedia.com/solutions/enterprise-solutions From what I can tell its pretty straight forward tracking, like google re-marketing, ...
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1answer
2k views

How to verify DNSKEY by using its corresponding DS

A DNSKEY on a name server can be verified by using it DS stored on its parental name server. According to RFC4034: The DS record refers to a DNSKEY RR by including a digest of that DNSKEY RR. The ...
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1answer
140 views

How did DNSChanger rogue name servers work?

I know DNS changer, changes DNS server with its own Evil DNS server on an infected computer, then the DNS servers point to their own rogue nameservers and the nameservers change the ads on websites ...
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1answer
137 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 ...
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2answers
62 views

Is VPN the only way to stop my ISP from logging my traffic?

I do know that my ISP is keeping logs permanently, which I'm not comfortable with because I like my privacy. Having said that, is VPN the only option to prevent my ISP from logging my traffic? The ...
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2answers
159 views

Does DNS-based blocking protect against ransomware?

I have been looking into OpenDNS as something to possibly use at my company, and they claim that Cryptolocker-style ransomware almost always uses DNS to "phone home" and that OpenDNS blocks this, ...
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2answers
269 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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5answers
3k views

What is the best way to run MitM attack on my wireless network?

For research purpose, I want to launch a MitM attack on computers that are connected to my wireless network. I wonder what is the best way to do so. Notice that I control the router, and do not want ...
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1answer
512 views

DNS: Conditional Forwarding

I'm currently attempting to track down a problem with a Websense Web Filter breaking SSL connections for sites in a conditional forward. To do this, I need to know exactly how a conditional forward ...
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1answer
710 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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2answers
454 views

DNS cache poisoning

What are the things the attacker needs to know from the victim to perform DNS cache poisoning ? for example : IP , Port number and Transaction number what else ?
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0answers
18 views

How to acquire DNSSEC root trust anchor from IANA?

I want to establish trust in a DNSSEC record. I found, that it can be done $ dig +sigchase +trusted-key=./root.key @8.8.8.8 eesti.ee root.key could be obtained with $ dig . DNSKEY @8.8.8.8 | grep ...
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0answers
43 views

bind9 resolves all queries to one address - a compromised server?

Since this morning we tried to open some SSL sites and were greeted by browser warnings, that certificate is not for this site. Upon checking the certificate, we determined that it is issued to ...
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2answers
24 views

DNS IP address auto reset

I have a unofficial Windows and i noticed that my internet connection gets reset. By taking a closer look at it, i found that the DNS server address is set to an IP in China. Any reason why this ...
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1answer
63 views

DynDNS alongside Tor? [closed]

Is there a way to resolve Dynamic DNS with Tor so that I can connect to my computer behind a NAT even if I am in a country that consider supicious connections to my native country ?
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0answers
42 views

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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0answers
136 views

DNS Server Recursive Query Cache Poisoning Weakness “Bounce DoS”

Tenable Nessus states that if there is a DNS Server Recursive Query Cache Poisoning Weakness the host allows recursive queries via UDP, then the host can be used to 'bounce' Denial of Service attacks ...
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107 views

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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0answers
93 views

DNS poisoned cache does not have any effect [closed]

I try to reproduce the attack, revealed by Dan Kaminsky in 2008, to poison DNS cache. I made my own virtual network, and all I do is confined within. The poisonning seems to work. But is doesn't. ...
2
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1answer
989 views

External network DNS spoofing

I've been thinking recently if its possible to DNS spoof an external network. Let's say for example you are attacker.com and your victim is of course victim.com. Then I've thought of 2 scenarios: 1. ...
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0answers
1k views

Hack scenario when a person has a non-superuser shell [closed]

Suppose that there are following three machines in the network: Machine A: Microsoft Server 2003 Service Pack 2 FileZilla 0.9.29 beta ftp server (TCP 21) Mcafee ePolicy server (81), remote desktop ...
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3answers
132 views

Are different top level domains somehow different security wise?

If so why is the difference? I've tried to google it but nothing relevant was found.
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2answers
20k views

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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2answers
196 views

Roommate Frequently Hacked — How Do I Protect My Network/Devices?

If you absolutely had to share a network with a user who had a very lax approach to security and was frequently hacked (1-2x month for over a year now), what might you consider doing to secure your ...
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2answers
297 views

anti virus acting up/DNS poisoning

I was running my desktop and the AV deleted a file that it said was a virus (this was not during a scan, just normal usage). Now I'm just browsing the web and I got a couple of DNS poisoning attacks ...
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3answers
913 views

Preventing 3rd party DNS Servers from being used

While using a wireless network recently that implemented a captive gateway, I noticed that any third party DNS servers manually set would not allow the network to connect properly. This would seem ...
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1answer
169 views

How to bypass DNS spoofing protection

I know that SSL certificates prevent DNS spoofing, but I was wondering why it is not possible after ARP cache poisoning to set up iptables rules and redirect the origin destination to fake page?
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3answers
168 views

MITM on popular sites - DNS

Can a MITM attack on popular sites such as Facebook.com Google.com be done by intercepting the DNS requests? Will the user notice something? For instance: Loading https://fb.com The client ...
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2answers
251 views

Difference between DNS spoofing and phishing [closed]

I am writing a bachelor thesis and I am having a hard time figuring out the difference between phishing and DNS spoofing. From what I understand, DNS spoofing is a way to achieve a succesfull phishing ...
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1answer
123 views

Force DNS to attach bad IP address

The question is not professional, but what I'm trying to say is... Is there any way to inject or force the DNS server to attach/change an IP address for some site. For example, I'm running an apache ...
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1answer
98 views

DNS Redelegation - Security Risk?

I am a web developer and I use Adobe Business Catalyst. To use some of their services it is recommended you redelegate the domain. In other words change the nameservers to Business Catalyst. I have ...
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1answer
430 views

Assuming no MITM, is Gmail communication 100% secure and private?

I sometimes have to use my personal Gmail account from my company workstation, where I know for fact they are using content-aware firewall(s) like Palo Alto, and potentially other nasty things like ...
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1answer
274 views

How does http://un****-us.com/ work?

There is this site un**-us.com which supposedly allows you to bypass ISP rules such as content restriction on a particular area. Now , it is well known that routing your traffic through a web proxy ...
1
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1answer
5k views

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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2answers
66 views

How do web hosts know you own your domain?

Let's say I registered a domain on Namecheap and want DigitalOcean to be my host. This can be achieved by first setting the nameservers to DigitalOcean in Namecheap's backend: Second, we add some ...
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1answer
28 views

Does DNSCrypt mask/hide the URLs I visit

I use DNSCrypt (https://dnscrypt.org/) and I'd like to know whether it's useful to mask/hide from my ISP (Telecom) the HTTP requests I make in my browser. And how does it protect me? Thanks
1
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1answer
99 views

Does using FreeDNS introduce a security risk?

If you use a service like FreeDNS for a DNS, does this introduce any additional security risk as opposed to simply paying a registrar? Obviously the owner of FreeDNS could hijack your domain. But ...
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2answers
140 views

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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2answers
954 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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1answer
184 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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1answer
193 views

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 ...