What Is Dns Proxy Server
DNS Proxy Overview | User Access and Authentication …
domain name system (DNS) proxy allows clients to use an SRX300, SRX320,
SRX340, SRX345, SRX550M, or SRX1500 device as a DNS proxy server.
A DNS proxy improves domain lookup performance by caching previous
lookups. A typical DNS proxy processes DNS queries by issuing a new
DNS resolution query to each name server that it has detected until
the hostname is resolved.
DNS Proxy CacheWhen a DNS query is resolved by a DNS proxy, the result is stored
in the device’s DNS cache. This stored cache helps the device to resolve
subsequent queries from the same domain and avoid network latency
If the proxy cache is not available, the device sends the query
to the configured DNS server, which results in network latency delays.
DNS proxy maintains a cache entry for each resolved DNS query.
These entries have a time-to-live (TTL) timer so the device purges
each entry from the cache as it reaches its TTL and expires. You can
clear a cache by using the clear system services dns-proxy cache command, or the cache will automatically expire along with TTL
when it goes to zero.
DNS Proxy with Split DNSThe split DNS proxy feature allows you to configure your proxy
server to split the DNS query based on both the interface and the
domain name. You can also configure a set of name servers and associate
then with a given domain name. When you query that domain name, the
device sends the DNS queries to only those name servers that are configured
for that domain name to ensure localization of DNS queries.
You can configure the transport method used to resolve a given
domain name—for example, when the device connects to the corporate
network through an IPsec VPN or any other secure tunnel. When you
configure a secure VPN tunnel to transport the domain names belonging
to the corporate network, the DNS resolution queries are not leaked
to the ISP DNS server and are contained within the corporate network.
You can also configure a set of default domain (*) and name
servers under the default domain to resolve the DNS queries for a
domain for which a name server is not configured.
Each DNS proxy must be associated with an interface. If an interface
has no DNS proxy configuration, all the DNS queries received on that
interface are dropped.
Figure 1 shows how the
split DNS proxy works in a corporate network.
Figure 1: DNS Proxy with Split
In the corporate network shown in Figure 1, a PC client that points
to the SRX Series device as its DNS server makes two queries—to
and to, The DNS proxy redirects
the, query to the DNS server (203. 0. 113. 253),
while the query is redirected to the ISP DNS server
(209. 100. 3. 130). Although the query for is sent to
the ISP DNS server as a regular DNS query using clear text protocols
(TCP/UDP), the query for the domain goes to the intranet’s
DNS servers over a secure VPN tunnel.
A split DNS proxy has the following advantages:
Domain lookups are usually more efficient. For example,
DNS queries meant for a corporate domain (such as) can go
to the corporate DNS server exclusively, while all others go to the
ISP DNS server. Splitting DNS lookups reduces the load on the corporate
server and can also prevent corporate domain information from leaking
onto the Internet.
A DNS proxy allows you to transmit selected DNS queries
through a tunnel interface, which prevents malicious users from learning
about the internal configuration of a network. For example, DNS queries
bound for the corporate server can pass through a tunnel interface
to use security features such as authentication and encryption.
Dynamic Domain Name System ClientDynamic DNS (DDNS) allows clients to dynamically update IP addresses
for registered domain names. This feature is useful when an ISP uses
Point-to-Point Protocol (PPP), Dynamic Host Configuration Protocol
(DHCP), or external authentication (XAuth) to dynamically change the
IP address for a customer premises equipment (CPE) router (such as
a security device) that protects a Web server. Internet clients can
reach the Web server by using a domain name even if the IP address
of the security device has previously changed dynamically.
A DDNS server maintains a list of the dynamically changed addresses
and their associated domain names. The device updates these DDNS servers
with this information periodically or in response to IP address changes.
The Junos OS DDNS client supports popular DDNS servers such as
Figure 2 illustrates how the DDNS client
Figure 2: Dynamic DNS
The IP address of the internal Web server is translated by
Network Address Translation (NAT) to the IP address of the untrust
zone interface on the device. The hostname is registered
with the DDNS server and is associated with the IP address of the
device’s untrust zone interface, which is monitored by the DDNS
client on the device. When the IP address of is changed,
the DDNS server is informed of the new address.
If a client in the network shown in Figure 2 needs to access, the client queries the DNS
servers on the Internet. When the query reaches the DDNS server, it
resolves the request and provides the client with the latest IP address
VPN vs Proxy vs Smart DNS: What’s The Difference? – Beebom
Protecting your anonymity online, and getting around regional restrictions on content is one of the most asked for things in an Internet that is fast becoming increasingly accessible, and equally dangerous. There are a variety of services that you can use to keep your online identity hidden, and to access region locked content; the most important being VPNs, Smart DNS, and Proxies. But, what exactly are these services? How do they work? And when should you choose one over the other? If you’re asking yourself any (or all) of these questions, read on to find out the differences between VPN, proxy, and Smart DNS:
What is VPN, Smart DNS, and Proxy
A VPN, or a Virtual Private Network basically creates a private network that is accessible over the Internet (public network). It allows users to communicate as if they were directly connected over the private network, when they are, in fact, communicating over the Internet. VPNs are widely used by companies that need to allow remote employees to access the private network, and are also used as a way to get secure, encrypted access to the Internet.
Image courtesy of Wikipedia
Smart DNS is a server that is specially configured to redirect users to a proxy server. Unlike VPNs, which forward all internet traffic through their tunnels, Smart DNS only forwards very specific traffic. All other traffic is allowed to travel through the Internet as it would without a Smart DNS, VPN, or Proxy server. As such, SmartDNS servers are mostly used to access online streaming websites that restrict their content to specific countries. In such cases, the Smart DNS server tricks the website into thinking that the user is accessing the website from an eligible location.
A Proxy server, is basically used to maintain anonymity over a network. Every web request you send is first forwarded to the Proxy server, which then transmits it to the server it was intended for. This makes the recipient server think that the Proxy server sent the original request, therefore keeping the user anonymous. When the server responds to the Proxy, it sends the response back to the user.
Differences Between VPN, Smart DNS, and Proxy
VPN vs Smart DNS
VPNs and Smart DNS services are often used for similar purposes, such as accessing geo-restricted content, however, the way that both these systems work is fundamentally different:
A VPN sends all your internet traffic through a tunnel that is meant to mask your IP Address, whereas Smart DNS usually only routes the traffic that is related to determining your geographical location.
While VPN provides encryption of traffic, and hides your IP address; Smart DNS does not do either of those.
A VPN uses a tunnel to make it appear as if you’re accessing the Internet from a different location. Smart DNS, on the other hand, uses a different method. It changes your DNS to fool websites into thinking that you’re accessing them from a different location, often one that falls within their list of “eligible locations” to access them.
Smart DNS is often faster than VPN, because, unlike VPN, it doesn’t have to route your data through a distant server.
VPN vs Proxy
VPNs, and Proxies, both make it appear as if you’re accessing the Internet from a different location, than you actually are. However, that’s all there is to similarities between the two. There are certain differences, as well:
A Proxy is like a man-in-the-middle. Your computer sends data to the Proxy, and it forwards it to the Internet, acting as if it is the source of the request. VPN, on the other hand, works at the system level, and captures all your network traffic, and routes it through the VPN tunnel.
Proxies simply hide your IP address, they do not provide any encryption, whatsoever. VPN, on the other hand, encrypts your Internet traffic, and communicates with the Internet.
Since Proxies don’t encrypt any data, and they simply change the IP address that is shown to websites, it is pretty easy for someone to snoop in on your data, and it’s not even too difficult to find out your real identity. More often than not, Proxies don’t strip any identifying data from your network, except for changing the IP address. A VPN, on the other hand, heavily encrypts the traffic originating from your computer, which makes it very secure, and thus, it prevents someone from snooping in. If you’re using a VPN (a good one), not even your ISP will be able to get a gander at your traffic. The same can’t be said for a Proxy.
However, since Proxies do not encrypt any data, the overhead is very low, and latency is minimum. A VPN, on the other hand, has a lot of overhead, due to the processing power required to encrypt data. It also usually introduces a lot of latency into the connection. This is simply the cost you need to pay for a reliable VPN.
Smart DNS vs Proxy
On their face, the two services might look similar, but they are very different. Here are some of the important differences between Smart DNS and Proxy:
A Proxy hides your IP, and replaces it with its own IP address, so websites don’t know who’s actually trying to access the data. Smart DNS does no such thing. It simply tricks the websites into thinking you’re from a location that is eligible to access their data.
Smart DNS can unblock major websites from a number of different countries at the same time, since it does not depend on changing the IP address. A Proxy, however, can only unblock access to a single country at one time.
Smart DNS also has a higher speed than Proxy. This happens because Smart DNS doesn’t do anything except hide traffic relevant to your geographic location, allowing the rest of the traffic to flow through normally.
VPN, Smart DNS or Proxy: When to Use What
By now, you must have understood fairly well how these three services differ from each other. However, they’re still very similar, and the choice of which service you want to use, lies completely on you. So, how do you decide which one of these three things to use when? Well, some common uses that befit each of these services are mentioned below:
Why You Should Use Proxy
A Proxy is the least secure method of all three. It only hides your IP, and can’t really protect you from being identified by anyone who is snooping in on the network. You can use Proxies in situations where you just need to make the website treat your computer as a different system, each time. For example, if you play a game where you get points for rating the game server on a website, and you want to do this multiple times. You can use a Proxy to make the website think that a different computer is accessing it each time. This can easily fool most websites that place restrictions such as the number of ratings that you can post every day.
Basically, Proxies should only be used for tasks where you don’t need any type of security. As such, it is not recommended to use a Proxy to keep yourself anonymous while accessing the Internet from a coffee shop.
Why You Should Use Smart DNS
Smart DNS is the best option to use in situations where you just want to access geo-restricted websites at the best possible speeds. So, you can use Smart DNS to access popular online streaming websites that are not yet available in your country. Also, if you want to access multiple websites, where each one is restricted to a different country, a Smart DNS is probably your best bet, as it can unblock access to multiple countries at the same time.
Smart DNS simply tricks the website into thinking that you’re accessing it from a location that is eligible to access its content. However, Smart DNS also doesn’t offer any sort of encryption, and is not recommended to be used when you need a secure connection to the Internet.
Why You Should Use VPN
VPN is the most processor intensive, bandwidth heavy option of all. However, it is also the most secure. As long as you use a VPN from a reliable VPN provider, you can be rest assured that your internet traffic will not be snooped in on. Even your ISP can’t see what you’re doing on the internet. This high security is VPNs strongest point. Therefore, you should use VPN services when you need to maintain the highest possible level of security while you’re browsing. VPNs should definitely be used when you’re accessing the Internet from a public WiFi network, such as the one at your local coffee shop, or at a hotel.
A VPN can bypass most restrictions placed on websites, whether it be from the website developers, or even from your government. VPN can allow you to freely access the Internet without worrying about being spied on by your ISP, your government, or a man-in-the-middle. If anyone snoops in, they’ll only be able to see encrypted data flowing through the connection.
Best VPN, Smart DNS, and Proxy Services
The only problem with using services such as VPN, Proxy, and Smart DNS, is finding a reliable provider. While there are a lot of providers that give these services, how do you figure out which one is the best? So, here are some of the best VPN, Smart DNS, and Proxy services that you can use:
TunnelBear is one of the best VPN services. They even have a great free tier of their service, which will give you 500 MB of free data every month – a limit you can increase by tweeting at the TunnelBear twitter handle. TunnelBear is very competitively priced, and I would definitely recommend that you give it a try.
Download TunnelBear (Free, plans start from $3. 33 per month); (Available for Android, iOS, Windows, and macOS)
ExpressVPN is another really great VPN service that you can try. They include unlimited data with any of their plans, and while they don’t offer any free tier, you do get a 30 day money back guarantee, so there’s no harm in trying.
Download ExpressVPN (Plans start from $8. 32 per month); (Available for Android, iOS, Windows, and macOS)
Smart DNS Services
Smart DNS Proxy is a really great option to go with if you want to use Smart DNS to access geo-restricted content on your system. They offer competitively priced plans for their service, and support more than 300 websites and services. They have a trial option available, so you can definitely check it out.
Visit the Smart DNS website (14 days free trial, plans start from $2. 07 per month); (Available for Android, iOS, Windows, macOS, Smart TVs, and Gaming Consoles)
CactusVPN is another website that offers Smart DNS services. They have a 7 day trial period when you have access to all of the premium features, after which, you will have to pay to continue using their service.
Visit the CactusVPN website (7 day free trial, $4. 99 per month); (Available for Android, iOS, Windows, and macOS)
There are a lot of websites that offer Proxy servers that you can use to access websites that are otherwise not accessible in your region. You can use 4everproxy, or dontfilterus to access geo-restricted websites from a Proxy server.
SEE ALSO: 10 Best Free VPN Apps for iPhone To Protect Your Privacy Online
Use VPN, Smart DNS, or Proxy to Freely Access the Internet
Depending on your requirement, and the type of service you want to access, you can now make a choice between a VPN, Smart DNS, or Proxy to unblock geo-restricted content. You can use VPNs to ensure that your internet traffic is encrypted, and that no one can see the websites you’re accessing on the web. However, since VPNs are inherently slower, if all you want is to access an online streaming website, you should use Smart DNS instead. At the end of the day, it’s completely up to you, to use the service that you think is best suited to your applications.
As always, we would like to know your thoughts on VPNs, Smart DNS, and Proxy. Also, let us know about your favourite VPN and Smart DNS providers, in the comments section below.
Complete Guide on What is A Smart DNS Proxy Server and …
Complete Guide on What is A Smart DNS Proxy Server and How Does it Work
Category: Smart DNS Proxy
Smart DNS Proxy is sophisticated technology which allows Internet users all over the world to unblock Geo-restricted (or Geo-Blocked) websites like Netflix, Hulu, WWE Newtork,, BBC and many more popular websites which contain regional-restricted content.
Some of the main advantages of using a Smart DNS Proxy service to unblock websites include:
Minimal loss of speed. Smart DNS Proxy only needs to re-route specific information relating to your geographical location – unlike a VPN (Virtual Private Network) which needs to re-route ALL of your internet data in order for you to visit just one site. (Read more about why you should never use a VPN to unblock blocked websites).
Very easy to use and install on ALL of your devices. has been specifically designed for easy installation. So you can unblock any regional blocked website from any device including your PC, Laptop, Kindle Fire, Apple TV, Gaming Console, Smart Phone, Android device and most other Internet capable devices.
Smart DNS Proxy works by simply changing the DNS of your device when trying to access regional blocked content from websites such as Netflix. Your data is quickly re-routed through a dedicated proxy server which is conveniently located in the country where the website you are trying to access is based. This means that you will appear to be located within the country or region where viewing has been permitted when trying to watch Geo-blocked content from your home country.
Smart DNS proxy is made specifically just for unblocking regional/geographical blocked websites such as Netflix, Pandora, Hulu, etc. Smart DNS proxy does not hide your IP and encrypt your data but it does have MUCH FASTER speeds when streaming video and audio content online from your Internet capable device. Smart DNS Proxy is quite simply the fastest and best way for you to unblock regional blocked content online.
Click the following link to read the many AWESOME Positive Reviews of Smart DNS Proxy which have been left by users of our service.
have servers located all around the world which means we are able to offer the ultimate viewing experience when streaming/downloading any type of regional or geo-blocked content online.
Smart DNS Proxy Servers are also compatible and extremely easy to use with all of your internet capable devices such as your Laptop, PC, Mobile Device, Kindle Fire TV, Apple TV, etc.
Don’t miss out and click the following link to get your FREE Smart DNS Proxy Trial NOW!
Frequently Asked Questions about what is dns proxy server
What is the difference between DNS and proxy server?
A Proxy hides your IP, and replaces it with its own IP address, so websites don’t know who’s actually trying to access the data. Smart DNS does no such thing. It simply tricks the websites into thinking you’re from a location that is eligible to access their data.Nov 20, 2017
How does a DNS proxy work?
Smart DNS Proxy works by simply changing the DNS of your device when trying to access regional blocked content from websites such as Netflix. Your data is quickly re-routed through a dedicated proxy server which is conveniently located in the country where the website you are trying to access is based.
Is DNS proxy good?
Smart DNS Proxy is great at website unblocking, but its ineffective kill switch is a major technical downside, and the clumsy app interface makes it awkward to use. It’s so cheap you might want to use it anyway, just to access Netflix or other sites, but we wouldn’t recommend it for anything more.Jul 6, 2020