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Cleanup DHCPD leases as well as DDNS Entries
Option 82 and dhcpd. “No free leases” for second computerDHCP DDNS not working for Linux clientsSome clients aren't updating using dhcpd's “ddns-update-style interim” with Windows dns serversddns correct setting for dhcpd.conf and ifcfg file with regards to hostnameCentOS 5 domain-search from DHCP server ignored by dhclientDHCP renew fails with multiple subnets on same linkBIND: DNS failover and high availability with dynamic updatesEdgerouter DNSmasq send updates to BINDDynamic DNS, basic configuration not workingCan isc-dhcp-server update bind running on a non default port?
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I have a fairly simple set up on a Debian server I'm running. I currently have isc-dhcp-server installed along with bind9. I set up my zone and my reverse lookup zones and set up dynamic updates, it's all working as expected.
My problem is that dhcpd is holding onto leases for a long time. If I look at my dhcpd.leases file it's a mess. I only have one VM pulling an address (for testing purposes before I put this server into production) and there's about 10 entries for it in dhcpd.leases.
I set the lease time to 5 seconds in dhcpd.conf just for testing purposes. I shut off this VM and waited a little while. The A and PTR record still exists in DNS.
My question is as follows: Is it possible to force dhcpd to clean up leases AND DNS records immediately after the lease expires?
When the lease is up I want everything that corresponded with that lease gone as well.
If you need any logs/config files let me know. I can post them, I just don't want to waste my time right now posting them if it's not needed.
dhcpd.conf
authoritative;
option domain-name "local";
option domain-name-servers pegasus.local;
ddns-updates on;
ddns-update-style interim;
ignore client-updates;
update-static-leases on;
default-lease-time 5;
max-lease-time 10;
log-facility local7;
include "/etc/dhcp/rndc.key";
zone local.
primary 10.1.0.3;
key rndc-key;
zone 1.10.in-addr.arpa.
primary 10.1.0.3;
key rndc-key;
shared-network local
subnet 10.1.0.0 netmask 255.255.0.0
option routers 10.1.255.254;
range 10.1.1.0 10.1.4.254;
domain-name-system dhcp bind dhcp-server dhcpd
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
add a comment |
I have a fairly simple set up on a Debian server I'm running. I currently have isc-dhcp-server installed along with bind9. I set up my zone and my reverse lookup zones and set up dynamic updates, it's all working as expected.
My problem is that dhcpd is holding onto leases for a long time. If I look at my dhcpd.leases file it's a mess. I only have one VM pulling an address (for testing purposes before I put this server into production) and there's about 10 entries for it in dhcpd.leases.
I set the lease time to 5 seconds in dhcpd.conf just for testing purposes. I shut off this VM and waited a little while. The A and PTR record still exists in DNS.
My question is as follows: Is it possible to force dhcpd to clean up leases AND DNS records immediately after the lease expires?
When the lease is up I want everything that corresponded with that lease gone as well.
If you need any logs/config files let me know. I can post them, I just don't want to waste my time right now posting them if it's not needed.
dhcpd.conf
authoritative;
option domain-name "local";
option domain-name-servers pegasus.local;
ddns-updates on;
ddns-update-style interim;
ignore client-updates;
update-static-leases on;
default-lease-time 5;
max-lease-time 10;
log-facility local7;
include "/etc/dhcp/rndc.key";
zone local.
primary 10.1.0.3;
key rndc-key;
zone 1.10.in-addr.arpa.
primary 10.1.0.3;
key rndc-key;
shared-network local
subnet 10.1.0.0 netmask 255.255.0.0
option routers 10.1.255.254;
range 10.1.1.0 10.1.4.254;
domain-name-system dhcp bind dhcp-server dhcpd
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12
add a comment |
I have a fairly simple set up on a Debian server I'm running. I currently have isc-dhcp-server installed along with bind9. I set up my zone and my reverse lookup zones and set up dynamic updates, it's all working as expected.
My problem is that dhcpd is holding onto leases for a long time. If I look at my dhcpd.leases file it's a mess. I only have one VM pulling an address (for testing purposes before I put this server into production) and there's about 10 entries for it in dhcpd.leases.
I set the lease time to 5 seconds in dhcpd.conf just for testing purposes. I shut off this VM and waited a little while. The A and PTR record still exists in DNS.
My question is as follows: Is it possible to force dhcpd to clean up leases AND DNS records immediately after the lease expires?
When the lease is up I want everything that corresponded with that lease gone as well.
If you need any logs/config files let me know. I can post them, I just don't want to waste my time right now posting them if it's not needed.
dhcpd.conf
authoritative;
option domain-name "local";
option domain-name-servers pegasus.local;
ddns-updates on;
ddns-update-style interim;
ignore client-updates;
update-static-leases on;
default-lease-time 5;
max-lease-time 10;
log-facility local7;
include "/etc/dhcp/rndc.key";
zone local.
primary 10.1.0.3;
key rndc-key;
zone 1.10.in-addr.arpa.
primary 10.1.0.3;
key rndc-key;
shared-network local
subnet 10.1.0.0 netmask 255.255.0.0
option routers 10.1.255.254;
range 10.1.1.0 10.1.4.254;
domain-name-system dhcp bind dhcp-server dhcpd
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
I have a fairly simple set up on a Debian server I'm running. I currently have isc-dhcp-server installed along with bind9. I set up my zone and my reverse lookup zones and set up dynamic updates, it's all working as expected.
My problem is that dhcpd is holding onto leases for a long time. If I look at my dhcpd.leases file it's a mess. I only have one VM pulling an address (for testing purposes before I put this server into production) and there's about 10 entries for it in dhcpd.leases.
I set the lease time to 5 seconds in dhcpd.conf just for testing purposes. I shut off this VM and waited a little while. The A and PTR record still exists in DNS.
My question is as follows: Is it possible to force dhcpd to clean up leases AND DNS records immediately after the lease expires?
When the lease is up I want everything that corresponded with that lease gone as well.
If you need any logs/config files let me know. I can post them, I just don't want to waste my time right now posting them if it's not needed.
dhcpd.conf
authoritative;
option domain-name "local";
option domain-name-servers pegasus.local;
ddns-updates on;
ddns-update-style interim;
ignore client-updates;
update-static-leases on;
default-lease-time 5;
max-lease-time 10;
log-facility local7;
include "/etc/dhcp/rndc.key";
zone local.
primary 10.1.0.3;
key rndc-key;
zone 1.10.in-addr.arpa.
primary 10.1.0.3;
key rndc-key;
shared-network local
subnet 10.1.0.0 netmask 255.255.0.0
option routers 10.1.255.254;
range 10.1.1.0 10.1.4.254;
domain-name-system dhcp bind dhcp-server dhcpd
domain-name-system dhcp bind dhcp-server dhcpd
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
edited Aug 9 '14 at 18:11
dhcpd_is_the_death_of_me
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
asked Aug 9 '14 at 13:43
dhcpd_is_the_death_of_medhcpd_is_the_death_of_me
163
163
Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12
add a comment |
Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12
Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12
add a comment |
1 Answer
1
active
oldest
votes
If you disable ddns update-optimization, it should remove the records when the lease ages out. [1]
1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
add a comment |
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If you disable ddns update-optimization, it should remove the records when the lease ages out. [1]
1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
add a comment |
If you disable ddns update-optimization, it should remove the records when the lease ages out. [1]
1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
add a comment |
If you disable ddns update-optimization, it should remove the records when the lease ages out. [1]
1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
If you disable ddns update-optimization, it should remove the records when the lease ages out. [1]
1: https://kb.isc.org/article/AA-01091/0/ISC-DHCP-support-for-Standard-DDNS.html
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
answered Dec 17 '14 at 15:05
DTKDTK
1,523614
1,523614
add a comment |
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Show us the dhcpd config file?
– Andrew B
Aug 9 '14 at 16:49
Added the contents of dhcpd.conf
– dhcpd_is_the_death_of_me
Aug 9 '14 at 18:12