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DNS

dkim Route53 CharacterStringTooLong (Value is too long)

Last updated on February 25, 2019 by Sal Ferrarello

When trying to add my the dkim DNS TXT record for my domain (to authenticate outgoing emails) in Amazon’s Route 53, I received the error message: “CharacterStringTooLong (Value is too long)”. This is how I fixed it.

Warning! This is a draft, not a finalized post. See full draft disclosure.

Filed Under: Draft, Solution Tagged With: AWS, DKIM, DNS

DIG and WHOIS returning different name servers

Last updated on August 27, 2018 by Sal Ferrarello

You can look up the name servers associated with a domain name using either “whois” or “dig NS”. In some rare occasions, I have gotten back two different answers using these two techniques. In my experience, “dig NS” is the more trustworthy of the two.

Warning! This is a draft, not a finalized post. See full draft disclosure.

Filed Under: Dev Tips, Draft Tagged With: command line, DNS, network

Avoid Mucking Up DNS

How to Avoid Mucking Up Your DNS

Last updated on August 16, 2018 by Sal Ferrarello

At WordCamp Lehigh Valley 2018, I presented How to Avoid Mucking Up Your DNS. When I started working with websites, modifying DNS settings terrified me. We’ll discuss the things I wished I knew then: A records, CNAMEs, TTLs, name servers, and how to test these things. We’ll look at things I broke and how the […]

Filed Under: Computing, Dev Tips, Presentation Tagged With: DNS

DNS Name Servers by Company

Last updated on January 5, 2018 by Sal Ferrarello

I’ve started compiling a list of name server domain names and the companies associated with them. This list has been helpful in guiding clients to the correct company to contact when modifying DNS records. You can determine your clients’ name servers by using a command line utility like whois or dig (e.g. whois salferrarello.com or […]

Filed Under: Dev Tips Tagged With: DNS, network

Command Line DNS Lookup with dig

Last updated on April 21, 2017 by Sal Ferrarello

dig is command line DNS Lookup program pre-installed on *nix and Macs. If you don’t have access to dig from the command line, there are some websites that offer a web interface to dig (e.g. Google Toolbox’s Online Dig). Basic Lookup (Similar to ping) dig example.com Advantages over ping: Doesn’t get grumpy when you include […]

Filed Under: Computing Tagged With: DNS, network

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