Blog
Mert Özen's blog posts on software development, backend, frontend, and DevOps.
Buying and Owning a Domain: Registry, Registrar, Nameserver Delegation and Not Losing Your Domain
A registry runs the TLD, a registrar sells the domain and you own it as the registrant; where its DNS lives is decided by the nameservers you enter at the registrar, after which the registrar's own DNS screen has no effect. In a two-container BIND lab we look at referrals, glue records and lame delegation, write a script that tracks expiry via RDAP, and build a checklist of lock, MFA and auto-renew so you don't lose the domain.
What Is Bookstore? The Shared Example Application Behind This Site's Series: Product, Users and Business Rules
Bookstore is an online bookstore chosen so that every series on the site takes place in the same world: retail sales, Institutional Orders for schools and libraries, and a back office. We cover its six roles, the main flow from catalog to shipping, business rules such as the 20-copy minimum, the 10 percent institutional discount, non-stacking campaigns and rounding half a cent up, the product's numbers and its team.