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| From | Fred Morris <m3047@m3047.net> |
| Newsgroups | comp.protocols.dns.bind |
| Subject | Best way to force a TC=1 response? |
| Date | Tue, 26 May 2020 13:50:25 -0700 |
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What's the best way to force an A query via UDP to return a TC=1 result: a really long CNAME chain? I want to set up a name that can be used in e.g. ping to perform an end to end resolution check in application context. The longer version is that there was a thread on postfix-users not too long ago about the fact that MUSL libc doesn't do TCP (among other things) and I want a way to test some hardware and statically built apps. No jumbo frames here. I was also mildly surprised to discover that glibc doesn't try TCP if UDP fails to answer; for some reason I thought it did! Instead it reports "Temporary failure in name resolution" in the ping example. -- Fred Morris
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Best way to force a TC=1 response? Fred Morris <m3047@m3047.net> - 2020-05-26 13:50 -0700 Re: Best way to force a TC=1 response? "John Levine" <johnl@iecc.com> - 2020-05-26 17:27 -0400
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