[Samba] [Fwd: Re: Samba_dlz, dhcp y zona inversa no actualiza]

[cosme at crearq.co.cu]

>> what is in '/usr/bin/dhcpd-update-samba-dns.sh' ?

# will receive addresses from this DHCP server. Instructions are found here:
#
https://wiki.archlinux.org/index.php/Samba_4_Active_Directory_Domain_Controller#DHCP
sleep 5
checkvalues()
{
[ -z "${2}" ] && echo "Error: argument '${1}' requires a parameter." &&
exit 1
case ${2} in
-*)
echo "Error: Invalid parameter '${2}' passed to ${1}."
exit 1
;;
*)
return 0
;;
esac
}
showhelp()
{
echo -e "\n"`basename ${0}` "uses samba-tool to update DNS records in
Samba 4's DNS"
echo "server when using INTERNAL DNS or BIND9 DLZ plugin."
echo ""
echo " Command line options (and variables):"
echo ""
echo " -a | --action Action for this script to perform"
echo "
ACTION={add|delete}"
echo " -c | --krb5cc
Path of the krb5 credential cache (optional)"
echo "
Default: KRB5CC=/run/dhcpd.krb5cc"
echo " -d | --domain
The DNS domain/zone to be updated"
echo "
DOMAIN={domain.tld}"
echo " -h | --help
Show this help message and exit"
echo " -H | --hostname Hostname of the record to be updated"
echo "
HNAME={hostname}"
echo " -i | --ip
IP address of the host to be updated"
echo "
IP={0.0.0.0}"
echo " -k | --keytab
Krb5 keytab to be used for authorization (optional)"
echo "
Default: KEYTAB=/etc/dhcp/dhcpd.keytab"
echo " -m | --mitkrb5 Use MIT krb5 client utilities"echo "
MITKRB5={YES|NO}"
echo " -n | --nameserver DNS server to be updated (must use FQDN, not IP)"
echo "
NAMESERVER={server.internal.domain.tld}"
echo " -p | --principal Principal used for DNS updates"
echo "
PRINCIPAL={user at domain.tld}"
echo " -r | --realm
Authentication realm"
echo "
REALM={DOMAIN.TLD}"
echo " -z | --zone
Then name of the zone to be updated in AD.
echo "
ZONE={zonename}
echo ""
echo "Example: $(basename $0) -d domain.tld -i 192.168.0.x -n 192.168.0.x \\"
echo "
-r DOMAIN.TLD -p user at domain.tld -H HOSTNAME -m"
echo ""
}
# Process arguments
[ -z "$1" ] && showhelp && exit 1
while [ -n "$1" ]; do
case $1 in
-a | --action)
checkvalues ${1} ${2}
ACTION=${2}
shift 2
;;
-c | --krb5cc)
checkvalues ${1} ${2}
KRB5CC=${2}
shift 2
;;
-d | --domain)
checkvalues ${1} ${2}
DOMAIN=${2}
shift 2
;;
-h | --help)
showhelp
exit 0
;;
-H | --hostname)
checkvalues ${1} ${2}
HNAME=${2%%.*}
shift 2
;;
-i | --ip)
checkvalues ${1} ${2}
IP=${2}shift 2
;;
-k | --keytab)
checkvalues ${1} ${2}
KEYTAB=${2}
shift 2
;;
-m | --mitkrb5)
KRB5MIT=YES
shift 1
;;
-n | --nameserver)
checkvalues ${1} ${2}
NAMESERVER=${2}
shift 2
;;
-p | --principal)
checkvalues ${1} ${2}
PRINCIPAL=${2}
shift 2
;;
-r | --realm)
checkvalues ${1} ${2}
REALM=${2}
shift 2
;;
-z | --zone)
checkvalues ${1} ${2}
ZONE=${2}
shift 2
;;
*)
echo "Error!!! Unknown command line opion!"
echo "Try" `basename $0` "--help."
exit 1
;;
esac
done
# Sanity checking
[ -z "$ACTION" ] && echo "Error: action not set." && exit 2
case "$ACTION" in
add | Add | ADD)
ACTION=ADD
;;del | delete | Delete | DEL | DELETE)
ACTION=DEL
;;
*)
echo "Error: invalid action \"$ACTION\"." && exit 3
;;
esac
[ -z "$KRB5CC" ] && KRB5CC=/run/dhcpd.krb5cc
[ -z "$DOMAIN" ] && echo "Error: invalid domain." && exit 4
[ -z "$HNAME" ] && [ "$ACTION" == "ADD" ] && \
echo "Error: hostname not set." && exit 5
[ -z "$IP" ] && echo "Error: IP address not set." && exit 6
[ -z "$KEYTAB" ] && KEYTAB=/etc/dhcp/dhcpd.keytab
[ -z "$NAMESERVER" ] && echo "Error: nameservers not set." && exit 7
[ -z "$PRINCIPAL" ] && echo "Error: principal not set." && exit 8
[ -z "$REALM" ] && echo "Error: realm not set." && exit 9
[ -z "$ZONE" ] && echo "Error: zone not set." && exit 10
# Disassemble IP for reverse lookups
OCT1=$(echo $IP | cut -d . -f 1)
OCT2=$(echo $IP | cut -d . -f 2)
OCT3=$(echo $IP | cut -d . -f 3)
OCT4=$(echo $IP | cut -d . -f 4)
RZONE="$OCT3.$OCT2.$OCT1.in-addr.arpa"
kerberos_creds() {
export KRB5_KTNAME="$KEYTAB"
export KRB5CCNAME="$KRB5CC"
if [ "$KRB5MIT" = "YES" ]; then
KLISTARG="-s"
else
KLISTARG="-t"
fi
klist $KLISTARG || kinit -k -t "$KEYTAB" -c "$KRB5CC" "$PRINCIPAL" || {
logger -s -p
daemon.error -t dhcpd kinit for dynamic DNS failed; exit 11; }
}
add_host(){
logger -s -p daemon.info -t dhcpd Adding A record for host $HNAME with IP
$IP to zone $ZONE
on server $NAMESERVER
samba-tool dns add $NAMESERVER $ZONE $HNAME A $IP -k yes
}
delete_host(){
logger -s -p daemon.info -t dhcpd Removing A record for host $HNAME with
IP $IP from zone
$ZONE on server $NAMESERVER
samba-tool dns delete $NAMESERVER $ZONE $HNAME A $IP -k yes
}update_host(){
CURIP=$(host -t A $HNAME | cut -d " " -f 4)
logger -s -p daemon.info -t dhcpd Removing A record for host $HNAME with
IP $CURIP from
zone $ZONE on server $NAMESERVER
samba-tool dns delete $NAMESERVER $ZONE $HNAME A $CURIP -k yes
add_host
}
add_ptr(){
logger -s -p daemon.info -t dhcpd Adding PTR record $OCT4 with hostname
$HNAME to zone
$RZONE on server $NAMESERVER
samba-tool dns add $NAMESERVER $RZONE $OCT4 PTR $HNAME.$DOMAIN -k yes
}
delete_ptr(){
logger -s -p daemon.info -t dhcpd Removing PTR record $OCT4 with hostname
$HNAME from
zone $RZONE on server $NAMESERVER
samba-tool dns delete $NAMESERVER $RZONE $OCT4 PTR $HNAME.$DOMAIN -k yes
}
update_ptr(){
CURHNAME=$(host -t PTR $OCT4 | cut -d " " -f 5)
logger -s -p daemon.info -t dhcpd Removing PTR record $OCT4 with hostname
$CURHNAME
from zone $RZONE on server $NAMESERVER
samba-tool dns delete $NAMESERVER $RZONE $OCT4 PTR $CURHNAME -k yes
add_ptr
}
case "$ACTION" in
ADD)
kerberos_creds
host -t A $HNAME.$DOMAIN > /dev/null
if [ "${?}" == 0 ]; then
update_host
else
add_host
fi
host -t PTR $IP > /dev/null
if [ "${?}" == 0 ]; then
update_ptr
else
add_ptr
fi
;;
DEL)kerberos_creds
host -t A $HNAME.$DOMAIN > /dev/null
if [ "${?}" == 0 ]; then
delete_host
fi
host -t PTR $IP > /dev/null
if [ "${?}" == 0 ]; then
delete_ptr
fi
;;
*)
echo "Error: Invalid action '$ACTION'!" && exit 12
;;
esac



>> what does it use to actually carry out the updates, samba-tool or
nsupdate ?

with both



what am I doing wrong?

Leonidch