HomeHome ArticlesArticles Most Popular ArticlesMost Popular Articles Most Helpful ArticlesMost Helpful Articles Request New ArticleRequest New Article
RSS Feeds
DrillDown Icon Table of Contents
DrillDown Icon Knowledge Base Information
DrillDown Icon Cyberoam Security Appliances (UTM and NGFW)
DrillDown Icon FAQs on Cyberoam and Sophos Firewall
DrillDown Icon Vulnerability Security Advisories
DrillDown Icon Best Practices & Policies
DrillDown Icon Protect Your Cyberoam Appliances from Power Fluctuations
DrillDown Icon Technical Library
DrillDown Icon Deployment
DrillDown Icon Registration & Licensing
DrillDown Icon System
DrillDown Icon Objects
DrillDown Icon Network
DrillDown Icon Add Static DNS Host Entry in Cyberoam
DrillDown Icon Establish a 6in4 IP tunnel using a Tunnel Broker Service
DrillDown Icon From where do I change the Maximum Transmission Unit (MTU) or Maximum Segment Size (MSS) values of any Cyberoam Interface?
DrillDown Icon Configure Multi-Port Bridge in Cyberoam
DrillDown Icon Configure DNS Inbound Load Balancing and Failover
DrillDown Icon Configure Link Aggregation (LAG) in Cyberoam
DrillDown Icon Configure Zone settings in Cyberoam
DrillDown Icon Routing
DrillDown Icon Wireless LAN (WLAN)
DrillDown Icon Wireless WAN
DrillDown Icon Configure Cyberoam as a DDNS Server
DrillDown Icon Create an IP Tunnel
DrillDown Icon Implement Transparent Subnet Gateway using Bridge Pair
DrillDown Icon Implement Transparent Subnet Gateways using Proxy ARP
DrillDown Icon Configure Cyberoam as HTTP Proxy Server Using Single Port
DrillDown Icon Configure DHCP Option Objects in Cyberoam
DrillDown Icon How do I configure DHCP Option Object 150 in VoIP Configuration?
DrillDown Icon Implement IPv6 using Cyberoam CLI Console
DrillDown Icon Configure Cyberoam as DHCP Relay
DrillDown Icon Tunnel IPv6 Traffic over IPv4 Network
DrillDown Icon Integrate Cyberoam with third-party Dynamic DNS Service Provider
DrillDown Icon Configure PPPoE on Cyberoam
DrillDown Icon Configure Cyberoam as DHCP Server
DrillDown Icon What is the meaning of AND & OR in Gateway Failover condition?
DrillDown Icon Does Cyberoam support Fiber Optical networks?
DrillDown Icon How to take a tcpdump on Cyberoam for IPv6 traffic?
DrillDown Icon Why are users not being able to access a website hosted on an internal web server when their browsers have Cyberoam configured?
DrillDown Icon How to prevent MAC Spoofing in Cyberoam?
DrillDown Icon Does Cyberoam Support H.323 Standard?
DrillDown Icon How can I clone the MAC address of an interface (Port) of Cyberoam?
DrillDown Icon Does Cyberoam support VLAN over WAN interface?
DrillDown Icon My 3G is not getting connected automatically after reboot. What can be the reason for the same?
DrillDown Icon How to change the Interface/Port Speed?
DrillDown Icon Does Cyberoam support RTP (Real-time Transport protocols)?
DrillDown Icon SIP support in Cyberoam
DrillDown Icon Which are the voice protocols supported by Cyberoam?
DrillDown Icon How do I tag Cyberoam's Bridge Interface initiated traffic with VLAN IDs?
DrillDown Icon How can I bring my LAN and WLAN that terminate on Cyberoam under a single subnet?
DrillDown Icon Configure Virtual LAN in Cyberoam
DrillDown Icon Configure Gateway Load Balancing and Failover
DrillDown Icon How to assign multiple IP addresses on WAN Interface?
DrillDown Icon How to check Gateway wise Data transfer?
DrillDown Icon Configure DHCP over VPN in Cyberoam
DrillDown Icon Identity
DrillDown Icon Firewall
DrillDown Icon VPN
DrillDown Icon IPS
DrillDown Icon Web Filter
DrillDown Icon Application Filter
DrillDown Icon Web Application Firewall (WAF)
DrillDown Icon IM
DrillDown Icon Quality of Service (QoS)
DrillDown Icon Anti Virus
DrillDown Icon Anti Spam
DrillDown Icon Logs & Reports
DrillDown Icon Clients
DrillDown Icon Cyberoam Maintenance
DrillDown Icon Compatibility
DrillDown Icon Archives
DrillDown Icon Cyberoam Virtual Security
DrillDown Icon Cyberoam iView
DrillDown Icon Cyberoam Central Console
DrillDown Icon Cyberoam's On-Cloud Management Service
  Subscribe Print PreviewPrint Current Article and All Sub-Articles
Rate Icon Rate Icon Rate Icon Rate Icon Rate Icon
Add Static DNS Host Entry in Cyberoam

Applicable Version: 10.6.1 onwards


The Domain Name System (DNS) is a system which translates domain names to IP Addresses and reverse of this i.e. translation from IP address to domain name is done by using reverse DNS. Given below is an illustration of how a DNS Request is resolved.

Types of DNS: There are two types of DNS using which translation of domain name to IP address can be done, one is static DNS and other one is Dynamic DNS.

Cyberoam allows you to create a Static DNS entry as well as you can configure Cyberoam as a DDNS (Dynamic DNS) server.

How DNS works:

Suppose, there is a website www.example.com with IP Address

So, when a user accesses the website www.example.com, the steps given below are followed to resolve this domain name into an IP address:

1.   Client sends request to Local DNS Server asking for the IP address of http://www.example.com.

2.   Local DNS Server forwards this request to the Authoritative DNS Server.

3.   The Authoritative DNS Server responds to the Local DNS Server with resolved IP addresses.

4.   The Local DNS Server replies to the client with the IP Address ( obtained from Cyberoam.
5.   The Client then access 
www.example.com using the HTTP request

Cyberoam supports Static DNS Host Entry wherein Cyberoam acts as a DNS Name Server that provides the requesting client with 'A' or 'AAAA' records to resolve their requested URL. Also, multiple host entries can be added to a single domain.

This facilitates resolving of frequent DNS requests ay Cyberoam itself, and avoiding multiple cycles of the above mentioned DNS resolution cycles for every request.

This article instructs how you can configure Static DNS host entry.


Create a static DNS host entry for a website www.example.com such that when user accesses it, the DNS request is resolved by Cyberoam itself.


You must be logged on to the Web Admin Console as an administrator with Read-Write permission for relevant feature(s).

Step 1 : Resolve IP address for a domain name

You can find resolved addresses for any domain name using CLI of Cyberoam.

Steps that can be used to find resolved address for any domain name are:

   Logon to CLI Console via Telnet or SSH. You can also access the CLI Console by clicking on the Console button on the
    upper right corner of the Web Admin Console screen.

    From firmware version 10.6.1 onwards, the Console button is visible to theSuper Administrator ONLY.

   Choose option 4. Cyberoam Console.

   Execute the following command to check all the resolved IP addresses for a particular domain name

    console > dnslookup host < domain name >

    For example, if you want to find resolved IP address for a domain name www.example.com then executing the following command will find the resolved IP addresses for this domain name:

    console > dnslookup host example.com

Step 2 : Configure Static DNS Host Entry

Go to Network > DNS > DNS Host Entry and click Add to add a DNS Host Entry.


Specify the IP Address for the domain www.example.com and click OK to save the host entry as shown below:



So after above configuration of DNS host entry in Cyberoam, thesteps that will be followed when any user accesses the website www.example.com are:

1.    Client sends the request to Cyberoam asking for the IP address of http://www.example.com

Cyberoam checks DNS host entries for the requested website

3.   Cyberoam replies to the client with the IP address found in the static DNS host entry for the requested domain.

4.   The client then accesses the website using the resolved IP address i.e. 


•   A maximum of Eight (8) Address Mappings are allowed.

      Only A, AAAA, and PTR type of DNS records are supported.

    Address (A) record - points a hostname to an IP address and returns a 32-bit IPv4 address.

    AAAA record - points a hostname to an IP address and returns a 128-bit IPv6 address.

    Pointer records (PTR) - are just the reverse of A records and are used for reverse lookups. It maps IP address to a hostname.

    Maximum DNS entries supported – 1024
    If the appliance interface is used as a DNS in the Client system then a query is sent to the configured DNS servers prior to querying the ROOT severs.

The above configuration creates a static DNS host entry for a domain name.

                                                                                                                                                     Document Version: 1.0 – 29 May, 2015


Related Articles

Article ID: 3129