<![CDATA["Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large."]]>"Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large."

I felt I had to put this into this CVE advisory I'm drafting...

]]>https://board.circlewithadot.net/topic/72c9c364-eec5-461d-835a-d41d17351ffc/trailing-dots-in-hostnames-is-a-menace-and-a-plague-that-keeps-haunting-us-and-the-world-at-large.RSS for NodeMon, 25 May 2026 12:10:53 GMTSat, 16 May 2026 09:26:50 GMT60<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 14:20:16 GMT]]>@bagder Thanks, I see the headache you're referring to. Good prediction that it wasn't the last time you'd run into it being an issue.

]]>https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116584691542124517https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116584691542124517Sat, 16 May 2026 14:20:16 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 14:11:22 GMT]]>@2Bfair https://daniel.haxx.se/blog/2022/05/12/a-tale-of-a-trailing-dot/

]]>https://board.circlewithadot.net/post/https://mastodon.social/users/bagder/statuses/116584656565821996https://board.circlewithadot.net/post/https://mastodon.social/users/bagder/statuses/116584656565821996Sat, 16 May 2026 14:11:22 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 13:30:51 GMT]]>@starlily @bagder

True but the trailing dot is still a core part of DNS.

RFC 1035

s make up a large share of the data in the master file.
The labels in the domain name are expressed as character strings and
separated by dots. Quoting conventions allow arbitrary characters to be
stored in domain names. Domain names that end in a dot are called
absolute, and are taken as complete. Domain names which do not end in a
dot are called relative; the actual domain name is the concatenation of
the relative part with an origin specified in a $ORIGIN, $INCLUDE, or as
an argument to the master file loading routine. A relative name is an
error when no origin is available.

]]>https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116584497257210730https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116584497257210730Sat, 16 May 2026 13:30:51 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 13:22:38 GMT]]>@2Bfair @bagder BIND != DNS

]]>https://board.circlewithadot.net/post/https://mastodon.social/users/starlily/statuses/116584464933306334https://board.circlewithadot.net/post/https://mastodon.social/users/starlily/statuses/116584464933306334Sat, 16 May 2026 13:22:38 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 10:38:44 GMT]]>@bagder

It's always DNS.

]]>https://board.circlewithadot.net/post/https://mastodon.online/users/zl2tod/statuses/116583820448720062https://board.circlewithadot.net/post/https://mastodon.online/users/zl2tod/statuses/116583820448720062Sat, 16 May 2026 10:38:44 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 10:35:11 GMT]]>@bagder I remember a guy in school making a real point out of the fact that the trailing period is valid, and as far as he was concerned, the preferred way!

I'm sure he turned his DNS passion into a profession

]]>https://board.circlewithadot.net/post/https://hachyderm.io/ap/users/115695384862759365/statuses/116583806480360393https://board.circlewithadot.net/post/https://hachyderm.io/ap/users/115695384862759365/statuses/116583806480360393Sat, 16 May 2026 10:35:11 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 10:24:19 GMT]]>@bagder My understanding is that's a core part of DNS so unlikely to change without redesigning DNS. I have wondered if part of the issue is that it gets abstracted away/ignored in implementation (i.e. you dont have to add the trailing dot in many things for an address to work).

]]>https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116583763765418597https://board.circlewithadot.net/post/https://infosec.exchange/ap/users/116347120688535430/statuses/116583763765418597Sat, 16 May 2026 10:24:19 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 09:37:50 GMT]]>@larsmb on the Internet, that purpose is lost

]]>https://board.circlewithadot.net/post/https://mastodon.social/users/bagder/statuses/116583581020488600https://board.circlewithadot.net/post/https://mastodon.social/users/bagder/statuses/116583581020488600Sat, 16 May 2026 09:37:50 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 09:37:23 GMT]]>@bagder Curious as to why, I thought a trailing dot served a specific purpose that is useful?

]]>https://board.circlewithadot.net/post/https://mastodon.online/users/larsmb/statuses/116583579204398884https://board.circlewithadot.net/post/https://mastodon.online/users/larsmb/statuses/116583579204398884Sat, 16 May 2026 09:37:23 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 09:30:27 GMT]]>@bagder itโ€™s called terminating for a reason ๐Ÿ˜‰

]]>https://board.circlewithadot.net/post/https://twitter.resolvt.net/users/zaphodb/statuses/116583551965103763https://board.circlewithadot.net/post/https://twitter.resolvt.net/users/zaphodb/statuses/116583551965103763Sat, 16 May 2026 09:30:27 GMT<![CDATA[Reply to "Trailing dots in hostnames is a menace and a plague that keeps haunting us and the world at large." on Sat, 16 May 2026 09:28:34 GMT]]>@bagder Don't worry about it, just use libcurl to... oh, wait...

]]>https://board.circlewithadot.net/post/https://mas.to/users/ticho/statuses/116583544572420730https://board.circlewithadot.net/post/https://mas.to/users/ticho/statuses/116583544572420730Sat, 16 May 2026 09:28:34 GMT