Title: underscores invalid
Name: wax
Date: 2/6/2013 9:52:06 AM
Comment:
A note on valid DNS.
underscores: _ are not valid for DNS. A hostname or domain name may never contain a underscore.
hostnames consisting of only numbers are actually valid DNS, so 33.domain.com is allowed.
http://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
Title: extended and modified for DNS configuration validation
Name: Andreas Burger
Date: 3/20/2012 5:05:19 AM
Comment:
Here's a version that also matches domains starting with a digit or an asterisk (*). I need this to match domains like 12.152.80.in-addr.arpa and *.domain.de for a DNS configuration suite.
^(?=^.{1,254}$)(^(?:(?!\.|-)([a-z0-9\-\*]{1,63}|([a-z0-9\-]{1,62}[a-z0-9]))\.)+(?:[a-z]{2,})$)$
Title: Not Working : machine name should not be passed.
Name: MP
Date: 8/31/2011 5:36:22 AM
Comment:
If I pass xyz as a machine name then it will be passed !
A FQDN should contain at least a dot ".", else it's not a FQDN, it's a hostname. as said by ED
Title: Not Working : machine name should not be passed.
Name: MP
Date: 8/31/2011 3:46:06 AM
Comment:
If I pass xyz as a machine name then it will be passed !
A FQDN should contain at least a dot ".", else it's not a FQDN, it's a hostname. as said by ED
Title: perl
Name: happyman
Date: 7/27/2010 6:50:11 AM
Comment:
not working for reverse domains 20.115.in-addr.arpa.
Title: javascript
Name: stx
Date: 9/5/2009 4:53:41 PM
Comment:
in javascript ?<!- doen't work.
only match LowerCase and no _ [a-z0-9]
/^(?=^.{1,254}$)(^(?:(?!\d+\.|-)([a-z0-9]{1,63}|([a-z0-9\-]{1,62}[a-z0-9]))\.)+(?:[a-z]{2,})$)$/
Non-Matche srv-01-abc
Title: FQDN vs hostname.
Name: ED.
Date: 5/6/2009 8:45:11 AM
Comment:
srv-01-abc is returned as valid FQDN.
It is not.
A FQDN should contain at least a dot ".", else it's not a FQDN, it's a hostname.
Title: Noticed huge slow down
Name: JH
Date: 4/4/2009 11:05:40 AM
Comment:
Hi
I've noticed that there is a huge slow down when matched against a string ending with a '.' For example test out:
deadmines-virtualconfig.qwer.zxcv.fghj.
I am using the built-in .NET regex library and running a IsMatch() on it.
It even chokes this website when I test it. RegexBuddy has no issues with it so it may be only .NET related.
Title: Noticed huge slow down
Name: JH
Date: 4/4/2009 11:05:29 AM
Comment:
Hi
I've noticed that there is a huge slow down when matched against a string ending with a '.' For example test out:
deadmines-virtualconfig.qwer.zxcv.fghj.
I am using the built-in .NET regex library and running a IsMatch() on it.
It even chokes this website when I test it. RegexBuddy has no issues with it so it may be only .NET related.
Title: A problem with long single sub-name
Name: Jason
Date: 1/3/2008 11:25:14 AM
Comment:
While testing this, I tried a single sub-name of more than 63 characters and the .Net Regex.IsMatch() hangs. I used this for my test data:
Rabbitcarrotstrawhaycowpatrichardandrewdevice12345678911234567892
Has anyone else tried testing the length boundaries?
Title: does it not work with c#?
Name: Markus Engelhardt
Date: 8/3/2007 7:46:53 AM
Comment:
Hi there.
After hours of searching I found exactly what I needed
with this sample... at least I thought so...
but unfortunately, I cannot get it to work in cä
"unknown group element" it keeps telling me
Can anyone maybe help me how to get the same for use with C#?
Thanks a lot in advance,
bet regards,
Markus
