Hi MongoDB Community, I have been using MongoDB 5.0.1. I am converting a few bash scripts from mongo to mongosh. I noticed MongoDB shell is rejecting hostnames with an underscore in the name “_” (and other characters which are not to DNS standards). These are accepted by the mongo command. $ mongo…

@K_C1 I’ve opened a ticket and we’ll get the _ in as an allowed character for more convenience for the --host parameter: https://jira.mongodb.org/browse/MONGOSH-933

Mongosh command rejects host names with an underscore which are accepted by mongo command

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Michael_Rose (Michael Rose) July 29, 2021, 9:16am 2

Hi KC!

Thanks for reaching out! Right now you could also specify a connection string like this:

mongosh mongodb://host_abc

The validation of the hostname does not happen there.

Just out of curiosity - the _ is the not allowed character in that case. Do you have other characters you have locally that would be regarded as invalid characters but you have as part of your DNS names?

If you want to you could also file a bug report in JIRA directly: https://jira.mongodb.org/projects/MONGOSH/issues. But I’ll take care of that for this request

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