DNS

Anonymous
Primary Nameserver Service All Janet services are governed by the Janet policies [1]. What is a primary nameserver?
16 June 2016 at 11:00pm
At the FIRST conference, James Pleger and William MacArthur from RiskIQ described a relatively new technique being used to create DNS domain names for use in phishing, spam, malware and other types of harmful Internet activity. Rather than registering their own domains, perpetrators obtain the usernames and passwords used by legitimate registrants to manage their own domains on registrars' web portals.
To apply in Welsh please click here. Cliciwch yma i wneud cais yn Gymraeg.
16 June 2015 at 1:55pm
Domain Name Service resolvers are an important source of information about incidents, but using their logs is challenging. A talk at the FIRST conference discussed how one large organisation is trying to achieve this.
26 June 2014 at 10:10am
Time to move from the mechanics and policy of DNS replication to a new topic. Within the global DNS there are two roles that a server can play: ones that hold data - nameservers, and ones that fetch that data for clients - resolvers. Nameservers need to provide their data to the entire Internet whereas resolvers serve a small set of client systems.
25 June 2014 at 2:15pm
So you've designed your redundant architecture and ensured that your data is being replicated across it? All set? Not quite. Within your DNS configuration there are two timers that we frequently see misconfigured -  TTL values and the SOA expire value. Frequently we see these left at default a default of one day (86400 seconds). Whilst these may suit many organisations it's worth taking a closer look to make sure that they match your expectation for your DNS services.
24 June 2014 at 1:53pm
Having designed a redundant DNS infrastructure, one of the most common mistakes is failing to ensure that secondary nameservers can successfully replicate data for the domains it is hosting. The most common way this is done on the Internet is though zone transfers - the AXFR command. This command causes a DNS server to reply with all the data it knows for a domain.
Subscribe to DNS