When the DHCP server doesn't provide any domain-name or domain-search value, it would be desirable for the DHCP client to set them to the result of "hostname -d" and to print them to /etc/resolv.conf as a fallback mechanism.

- -- System Information:
Debian Release: 11.0
  APT prefers stable-security
  APT policy: (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-8-amd64 (SMP w/8 CPU threads)
Locale: LANG=fi_FI.utf8, LC_CTYPE=fi_FI.utf8 (charmap=UTF-8), LANGUAGE=fi:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages isc-dhcp-client depends on:
ii  debianutils        4.11.2
ii  iproute2           5.10.0-4
ii  libc6              2.31-13
ii  libdns-export1110  1:9.11.19+dfsg-2.1
ii  libisc-export1105  1:9.11.19+dfsg-2.1

Versions of packages isc-dhcp-client recommends:
ii  isc-dhcp-common  4.4.1-2.3

Versions of packages isc-dhcp-client suggests:
pn  avahi-autoipd         <none>
pn  isc-dhcp-client-ddns  <none>
pn  resolvconf            <none>

- -- Configuration Files:
/etc/dhcp/dhclient.conf changed:
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
send host-name = gethostname();
request subnet-mask, broadcast-address, time-offset, routers,
	domain-name, domain-name-servers, domain-search, host-name,
	dhcp6.name-servers, dhcp6.domain-search, dhcp6.fqdn, dhcp6.sntp-servers,
	netbios-name-servers, netbios-scope, interface-mtu,
	rfc3442-classless-static-routes, ntp-servers;
default domain-name "lan";
default domain-search "lan";
append domain-name-servers 1.1.1.1;

- -- no debconf information
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Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)