NETWAYS / NETWAYS/postfix-logstash-pipeline

Improve checking for IP address or domain name

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#38 2 comments 0 reactions 0 assignees View on GitHub

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Description

Thanks @RincewindsHat for pointing that out. There are valid domain names that start with a digit. To be honest, I don't know if a hostname may start with a digit, too according to RFC. But since it's possible, we have a domain name in server.address and client.address we should make sure to have a more robust check in filter-70-client.conf and filter-70-server.conf.

To be honest, I consider host- and domainnames starting with a digit as fairly exotic. So I think it's important to fix that but not an immediate must to start a fix right now.

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Research direction

Inspect the address checks in filter-70-client.conf and filter-70-server.conf, starting with how server.address and client.address are currently recognized. Compare the checks with valid domain and hostname cases that begin with a digit; done means both filters handle those cases without breaking existing address parsing.

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Assessment

Domain
data-engineering
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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