Sorry, I missed the
before: Yes, they can cause issues. The IP address is fed through inet_pton which may trim spaces around addresses, I have not seen any details about this in man inet_ntop but it may be possible. The extra spaces and tabs in the hostname are probably an issue but dnsmasq validates the hostnames you define here for validity, i.e., only a-z A-Z 0-9 - _ are allowed here. It should fail hard with bad DHCP host name otherwise,