isr4331 as dns server

[SAMEHELSAMMAK]

dear all

i configured the isr4331 as dns server and it forwards requests to OpenDNS servers

it works correctly without any problems

my question is the dns records  or hosts on the router

do i need to clear them manually at specific periods

or will the router do that automatically ?

ip name-server 208.67.222.222 208.67.220.220
ip domain name xxx.com

ip dhcp pool WEBUIPool
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1
lease 0 5

ip dns view default
dns forwarder 208.67.222.222
dns forwarder 208.67.220.220
ip dns server

[balaji.bandi]

i would not advise Router as DNS Server (for time being you can use until you have a full-blown DNS Server / DHCP Server in place)

you need to manually manage any A records or SoA timers required.

more information can be find here :

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dns/configuration/15-mt/dns-15-mt-book/dns-config-dns.html

Note : i prefer to have small Linux Pi as DNS and DHCP server in the network.

[SAMEHELSAMMAK]

so for now i need to clear the hosts manually 

do i do it daily or every 48 hours or ?

[balaji.bandi]

so for now i need to clear the hosts manually 

do i do it daily or every 48 hours or ?

Can you some examples of why you need to do so, this is DNS Service ? 

some reference again :

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dns/configuration/15-sy/dns-15-sy-book/Configuring-DNS.html#GUID-A2EC61FC-FD64-438E-972D-E8A4BB8A84F0

[Georg Pauwen]

Hello,

I think the default timeout is 180 seconds. If you e.g. ping www.google.com and then 'show hosts view default all', the entry stays in there for about 3 minutes...

[SAMEHELSAMMAK]

show hosts view default all

doesnt show any thing

but when i show hosts 

it shows the dns records

i dont know how long they are kept 

so do i need to clear them daily or leave them ?

[Georg Pauwen]

Hello,

do the hosts have a 'temp' flag ? Post the output of 'show hosts'.

When you do the test I suggested (ping www.google.com) how long does the entry stay in there ?

[SAMEHELSAMMAK]

Sat Oct 23 2021 22:48:49 GMT+0200 (Eastern European Standard Time)
===================================================================================
#show hosts view default all
Command Execution Completed

Sat Oct 23 2021 22:48:42 GMT+0200 (Eastern European Standard Time)
===================================================================================
#show hosts
Default domain is xxx.com
Name servers are 208.67.222.222, 208.67.220.220
NAME TTL CLASS TYPE DATA/ADDRESS
-----------------------------------------

d13bp4e0gihgcp.cloudfront.net 41 IN A 13.32.158.113
d13bp4e0gihgcp.cloudfront.net 41 IN A 13.32.158.114
d13bp4e0gihgcp.cloudfront.net 41 IN A 13.32.158.106
d13bp4e0gihgcp.cloudfront.net 41 IN A 13.32.158.111
c.cfeu.prod.t300.ter.int.amazonvideo.com 40 IN CNAME c.c001.cfeu.prod.t300.ter.int.amazonvideo.com
c.eu.prod.t300.ter.int.amazonvideo.com 40 IN CNAME c.cfeu.prod.t300.ter.int.amazonvideo.com
eu.prod.t300.ter.int.amazonvideo.com 40 IN CNAME c.eu.prod.t300.ter.int.amazonvideo.com
ab2xb7ra6e44.eu.api.amazonvideo.com 36 IN CNAME eu.prod.t300.ter.int.amazonvideo.com
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 44.232.5.195
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 34.209.170.118
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 34.212.190.30
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 34.215.61.194
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 35.164.74.155
prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com 36 IN A 35.166.79.231
signal.pod1.avatar.ext.hp.com 368 IN CNAME prod-pod1-signaling-pod-lb-1964079050.us-west-2.elb.amazonaws.com
api.amazon.com 22 IN A 52.46.143.123
self.events.data.microsoft.com 1093 IN CNAME self-events-data.trafficmanager.net
api.restream.io 19 IN A 46.51.156.117
api.restream.io 19 IN A 52.210.145.193
api.restream.io 19 IN A 99.81.244.250
s-0005.s-msedge.net 138 IN A 52.113.194.132
config-teams.s-0005.s-msedge.net 140 IN CNAME s-0005.s-msedge.net
s-0005-teams.config.skype.com 3498 IN CNAME config-teams.s-0005.s-msedge.net
config.teams.microsoft.com 289 IN CNAME config.teams.trafficmanager.net
mobile.pipe.aria.microsoft.com 164 IN CNAME mobile.events.data.trafficmanager.net
teams.events.data.microsoft.com 2753 IN CNAME teams-events-data.trafficmanager.net
outlook.office365.com 52 IN CNAME outlook.ms-acdc.office.com
substrate.office.com 186 IN CNAME outlook.office365.com
mas-ext.amazon.com 310 IN A 54.239.26.246
europe.configsvc1.live.com.akadns.net 177 IN A 52.109.76.68
prod.configsvc1.live.com.akadns.net 177 IN CNAME europe.configsvc1.live.com.akadns.net
officeclient.microsoft.com 3087 IN CNAME config.officeapps.live.com
nav.smartscreen.microsoft.com 66 IN CNAME wd-prod-ss.trafficmanager.net
addgadgets.com 110 IN A 172.67.196.109
addgadgets.com 110 IN A 104.21.21.52
www.ipchicken.com 66 IN A 104.26.8.109
www.ipchicken.com 66 IN A 104.26.9.109
www.ipchicken.com 66 IN A 172.67.73.20
my.te.eg 28 IN A 196.219.3.120
ksn-dc1-st.geoksn.kaspersky.com 3060 IN A 77.74.181.62
ksn-dc1-st.geoksn.kaspersky.com 3060 IN A 77.74.181.71
ksn-dc1-st.geoksn.kaspersky.com 3060 IN A 62.128.100.45
ksn-dc1-st.geoksn.kaspersky.com 3060 IN A 62.128.100.49
dc1-st.ksn.kaspersky-labs.com 1905 IN CNAME ksn-dc1-st.geoksn.kaspersky.com
nrdp.prod.ftl.netflix.com 75200 IN CNAME nrdp-ixanycast.ftl.netflix.com
roaming.officeapps.live.com 3212 IN CNAME prod.roaming1.live.com.akadns.net
star.facebook.com 2508 IN CNAME star.c10r.facebook.com
time-osx.g.aaplimg.com 553 IN A 17.253.108.253
time-osx.g.aaplimg.com 553 IN A 17.253.54.125
time-osx.g.aaplimg.com 553 IN A 17.253.54.251
time-osx.g.aaplimg.com 553 IN A 17.253.54.253
time-osx.g.aaplimg.com 553 IN A 17.253.108.125
g.whatsapp.net 2752 IN CNAME chat.cdn.whatsapp.net
amplitude.life360.com 164 IN CNAME amplitude-life360-com-207526384.us-east-1.elb.amazonaws.com
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.157
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.159
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.237
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.239
ksn-file.geoksn.kaspersky.com 84 IN A 81.19.104.37
ksn-file.geoksn.kaspersky.com 84 IN A 81.19.104.40
ksn-file.geoksn.kaspersky.com 84 IN A 195.122.177.180
ksn-file.geoksn.kaspersky.com 84 IN A 62.67.238.146
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.109
ksn-file.geoksn.kaspersky.com 84 IN A 62.128.100.131
geoksn.kaspersky.com 3073 IN SOA dnsmaster.kasperskylabs.net dnsadmin.kaspersky.com 1635021544 7200 3600 864000 3600
www2.ati.com 81 IN CNAME www2.ati.com.edgekey.net
cdn-drivers.amd.com.edgekey.net.globalredir.akadns.net 380 IN CNAME e2897.dscd.akamaiedge.net
cdn-drivers.amd.com.edgekey.net 11521 IN CNAME cdn-drivers.amd.com.edgekey.net.globalredir.akadns.net
drivers.amd.com 32479 IN CNAME cdn-drivers.amd.com.edgekey.net
download.amd.com 31689 IN CNAME www2.ati.com.edgekey.net
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.177.176
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.177.180
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.177.198
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.181.28
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.181.30
ksn-stat.geoksn.kaspersky.com 80 IN A 62.128.101.10
ksn-stat.geoksn.kaspersky.com 80 IN A 62.128.101.11
ksn-stat.geoksn.kaspersky.com 80 IN A 77.74.177.174
v10.events.data.microsoft.com 1802 IN CNAME global.asimov.events.data.trafficmanager.net
ocsp2.apple.com 75203 IN CNAME ocsp2-lb.apple.com.akadns.net
aidc.apple.com 75244 IN CNAME aidc.origin-apple.com.akadns.net
cs9.wac.phicdn.net 1134 IN A 93.184.220.29
crl4.digicert.com 9615 IN CNAME cs9.wac.phicdn.net
settings-win.data.microsoft.com 1612 IN CNAME settingsfd-geo.trafficmanager.net
crl.sectigo.com 968 IN CNAME crl.comodoca.com.cdn.cloudflare.net
xp.apple.com.edgekey.net 19498 IN CNAME e17437.dscb.akamaiedge.net
xp.apple.com 1748 IN CNAME xp.itunes-apple.com.akadns.net
ds.kaspersky.com 2377 IN CNAME ksn-ds.geoksn.kaspersky.com
r5.sn-4g5e6nze.googlevideo.com 594 IN A 173.194.187.202
r5---sn-4g5e6nze.googlevideo.com 594 IN CNAME r5.sn-4g5e6nze.googlevideo.com
web.facebook.com 12 IN CNAME star.facebook.com
gateway.facebook.com 2053 IN CNAME msgr-latest.c10r.facebook.com
itunes-cdn.itunes-apple.com.akadns.net 757 IN CNAME itunes.apple.com.edgekey.net
itunes.apple.com 2240 IN CNAME itunes-cdn.itunes-apple.com.akadns.net
www.apple.com.edgekey.net.globalredir.akadns.net 2241 IN CNAME e6858.dscx.akamaiedge.net
www.apple.com.edgekey.net 18828 IN CNAME www.apple.com.edgekey.net.globalredir.akadns.net
mesu.apple.com.edgekey.net 14790 IN CNAME e1329.g.akamaiedge.net
r5.sn-hgn7yn7z.googlevideo.com 288 IN A 74.125.11.234
r5---sn-hgn7yn7z.googlevideo.com 288 IN CNAME r5.sn-hgn7yn7z.googlevideo.com
r2.sn-aigzrn7e.googlevideo.com 240 IN A 173.194.5.39
r2---sn-aigzrn7e.googlevideo.com 239 IN CNAME r2.sn-aigzrn7e.googlevideo.com
amp-api.apps.apple.com.edgekey.net 15797 IN CNAME e3925.dscx.akamaiedge.net
r2.sn-aigzrn76.googlevideo.com 217 IN A 173.194.137.71
r2---sn-aigzrn76.googlevideo.com 216 IN CNAME r2.sn-aigzrn76.googlevideo.com
lh3.googleusercontent.com 32746 IN CNAME googlehosted.l.googleusercontent.com
client-api.itunes.apple.com.edgesuite.net 6518 IN CNAME a1838.dscb.akamai.net
crl-symcprod.digicert.com 1421 IN CNAME cs9.wac.phicdn.net
smartscreen-prod.microsoft.com 1147 IN CNAME wd-prod-ss.trafficmanager.net
myiponline.com 1362 IN A 50.97.68.122
www.whatsmyip.us 12021 IN CNAME whatsmyip.us
edge-mqtt.facebook.com 307 IN CNAME mqtt.c10r.facebook.com
go.microsoft.com 981 IN CNAME go.microsoft.com.edgekey.net
outlookmobile-office365-tas.msedge.net 278 IN CNAME outlookmobile-office365-tas-msedge-net.e-0009.e-msedge.net
o.lencr.edgesuite.net 14727 IN CNAME a1887.dscq.akamai.net
ocsp.globalsign.com 2840 IN CNAME global.prd.cdn.globalsign.com
ocsp2.globalsign.com 14800 IN CNAME global.prd.cdn.globalsign.com
crl.apple.com 571 IN CNAME crl-lb.apple.com.akadns.net
ksn-dc1.geoksn.kaspersky.com 36 IN A 195.27.253.11
ksn-dc1.geoksn.kaspersky.com 36 IN A 195.122.177.160
ksn-dc1.geoksn.kaspersky.com 36 IN A 195.122.177.184
ksn-dc1.geoksn.kaspersky.com 36 IN A 81.19.104.213
ksn-dc1.geoksn.kaspersky.com 36 IN A 81.19.104.214
pancake.apple.com 74453 IN CNAME pancake.cdn-apple.com.akadns.net
graph.facebook.com 481 IN CNAME api.facebook.com
ocsp.sectigo.com 276 IN CNAME ocsp.comodoca.com.cdn.cloudflare.net
suggestqueries.google.com 585405 IN CNAME suggestqueries.l.google.com
mtalk.google.com 41351 IN CNAME mobile-gtalk.l.google.com
yt3.ggpht.com 595154 IN CNAME photos-ugc.l.googleusercontent.com
67b.org 4514 IN A 184.105.143.133
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9BC4:7EBB
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9C88:87A9
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9CA8:A8AD
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9D91:837B
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9DB3:C59D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9EB1:74B9
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9F9A:86C2
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9FA6:B39A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:9FB6:C493
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A17D:7E72
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A36F:8389
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A37A:B6A8
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A4B1:BDB3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A4B8:A386
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A58B:B9A2
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A5BF:C787
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A6B2:A27B
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A770:7A7D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A8C1:A88A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:A97A:75A2
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:ABA5:C39D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:ABB2:8399
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:ABB8:BC7F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:AC7C:C57F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:ACA4:768E
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:AD8E:80BC
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B1B8:AFB0
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B370:9393
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B3B1:9AAC
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B3C0:C57F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B59F:A8A3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B67A:A3C0
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B6C7:9CC3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B78F:9272
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B7B9:AF9E
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B7C4:BA7E
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B88E:939B
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B8AE:9AA5
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B970:AF81
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B983:B770
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:B98E:987A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BA97:7080
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BAB5:B57A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BAC3:9E8D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BB74:90A7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BB98:72BF
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BBA4:A5C7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BBC7:7EA6
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BC73:AD7E
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BC98:A2A9
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BD72:84AE
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BD79:AC8A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BD93:B88D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BF71:A179
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BF73:7080
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BF90:C7AF
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:BFA5:858A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C0C4:A286
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C17C:9780
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C1C6:B5AF
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C1C6:C07F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C271:AB9F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C29E:9C8A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C381:ABB5
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C39C:C3AB
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C3C5:7AC3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C59D:86BA
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C59F:98AE
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:C7A6:87BA
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:6F6F:6F6F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:6F7E:C0C4
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:6F8E:80B1
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7071:A9B6
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7187:BC8E
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7192:ADC6
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:71B7:72C6
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:71BD:C576
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:72A5:8790
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:737F:8988
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7388:7EBB
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7388:B37F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7593:C39B
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:76BC:BA84
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:777E:717D
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:77B2:9791
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:77B6:AEB3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:77BF:C385
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7990:9884
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7AA4:85B7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7B79:C0C7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7B80:7EA7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7BA4:88BA
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7BA4:C1B3
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7BBC:9FBF
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7C73:7AC7
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7D94:BD9F
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7D98:949C
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:7FC0:B5C5
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:8071:B9BB
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:8076:7BA9
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:808E:8A98
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:8197:7C8B
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:83AF:708A
67b.org 69174 IN AAAA 2444:2444:2444:2444:2444:FFFF:847D:88C0
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[SAMEHELSAMMAK]

Sat Oct 23 2021 22:48:49 GMT+0200 (Eastern European Standard Time)
===================================================================================
#show hosts view default all
Command Execution Completed

Sat Oct 23 2021 22:48:42 GMT+0200 (Eastern European Standard Time)

[Georg Pauwen]

Hello,

as I said, my tests showed that the entries (if unused obviously) time out after about 180 seconds. Is that what you see as well ? 

Try and access a website that nobody else accesses, and monitor the time when it disappears from the list:

www.farhorizonmedia.com

[paul driver]

Hello

When you set a router as a dns server then you would only really need to specify the name servers to forward dns requests unless that is you want to split the dns resolution?

ip dns view default  <- normaly used for split dns 
dns forwarder 208.67.222.222  < the specified name servers are already forwarding dns requests

---

@SAMEHELSAMMAK wrote:

so for now i need to clear the hosts manually 

do i do it daily or every 48 hours or ?

r

---

Why are you needing to clear host records?

[SAMEHELSAMMAK]

I don't need to clear them , i am asking do i need to clear them every 1 or 2 days or the router will do it automatically or do i leave them as is ?

[paul driver · Accepted solution]

Hello
No you dont require to clear any DNS records, The DNS servers should be using refresh/ aging/scavenging features to update its records or purge stale ones