Support for multiple wildcard filterering

[marcelo321]

Please describe your feature request:

I think it would be really helpful you support multiple wildcard filter. Let's say I want to resolve 1k subdomains at the same time, and in the list there are at least 5 different root domains, I can't use dnsx because it only support one wildcard filter at the same time.

It would be cool to have a flag like -wd all to do wildcard filtering on all domains/subdomains on the list.

[marcelo321]

Also that flag doesn't appear to be doing a very good job:

# cat a
ads.closeenough.data.hbo.com
asd.ads.closeenough.data.hbo.com
nono.ads.closeenough.data.hbo.com

# cat a | dnsx -rcode servfail -silent
nono.ads.closeenough.data.hbo.com [SERVFAIL]
asd.ads.closeenough.data.hbo.com [SERVFAIL]
ads.closeenough.data.hbo.com [SERVFAIL]

# cat a | dnsx -rcode servfail -wd hbo.com -silent
#

What I am looking is to identify servfail subdomains, and of course filter the wildcards. Almost all servfails are wildcards, so the filter would be to check the "start" of the wildcard.

Let's say in this case it is closeenough.data.hbo.com it is the start of the wildcard, everything below this subdomain gives SERVFAIL, but if you remove closeenough , data.hbo.com gives NOERROR.

[MetzinAround]

Thanks for the issue @marcelo321. I'm going to move this to discussions and tag @ehsandeep on it to see what he thinks about it.