Dns Priority
Test suite to check DNS service priorities
Valid Address
Description
Configures a simple, valid address and checks the DNS can resolve it. There is no priority involved as a single address is in use.
Scenario
Step 1: Set the following configuration in DUT1:
set interfaces ethernet eth0 address 10.0.0.2/24 set service dns forwarding record host teldat.com ipv4-address 172.24.0.11 set service dns forwarding record host teldat.com ipv6-address ff00::dead:cafe set service dns resolver local
Step 2: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10.0.0.1/24 set service dns forwarding logs set service dns resolver local set service dns forwarding name-server 10.0.0.2
Step 3: Ping IP address 10.0.0.2 from DUT0:
admin@DUT0$ ping 10.0.0.2 count 1 size 56 timeout 1Show output
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.483 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.483/0.483/0.483/0.000 ms
Step 4: Run command show host lookup teldat.com type A wait 0 at DUT0 and check if output contains the following tokens:
172.24.0.11Show output
teldat.com has address 172.24.0.11
Step 5: Run command service dns forwarding show logs | cat at DUT0 and expect this output:
Show output
-- Logs begin at Thu 2023-11-23 22:33:21 UTC, end at Thu 2023-11-23 22:33:24 UTC. -- Nov 23 22:33:23 osdx dnsmasq[24696]: dnsmasq: syntax check OK. Nov 23 22:33:23 osdx dnsmasq[24703]: started, version 2.80 cachesize 150 Nov 23 22:33:23 osdx dnsmasq[24703]: DNS service limited to local subnets Nov 23 22:33:23 osdx dnsmasq[24703]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Nov 23 22:33:23 osdx dnsmasq[24703]: warning: ignoring resolv-file flag because no-resolv is set Nov 23 22:33:23 osdx dnsmasq[24703]: using nameserver 10.0.0.2#53 Nov 23 22:33:23 osdx dnsmasq[24703]: read /etc/hosts - 1 addresses Nov 23 22:33:24 osdx dnsmasq[24703]: query[A] teldat.com from ::1 Nov 23 22:33:24 osdx dnsmasq[24703]: forwarded teldat.com to 10.0.0.2 Nov 23 22:33:24 osdx dnsmasq[24703]: reply teldat.com is 172.24.0.11
Valid Address IPv6
Description
Configures a simple, valid IPv6 address and checks the DNS can resolve it. There is no priority involved as a single address is in use.
Scenario
Step 1: Set the following configuration in DUT1:
set interfaces ethernet eth0 address 10::2/64 set service dns forwarding record host teldat.com ipv4-address 172.24.0.11 set service dns forwarding record host teldat.com ipv6-address ff00::dead:cafe set service dns resolver local
Step 2: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10::1/64 set service dns forwarding logs set service dns resolver local set service dns forwarding name-server 10::2
Step 3: Ping IP address 10::2 from DUT0:
admin@DUT0$ ping 10::2 count 1 size 56 timeout 1Show output
PING 10::2(10::2) 56 data bytes 64 bytes from 10::2: icmp_seq=1 ttl=64 time=0.645 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.645/0.645/0.645/0.000 ms
Step 4: Run command show host lookup teldat.com type A wait 0 at DUT0 and check if output contains the following tokens:
172.24.0.11Show output
teldat.com has address 172.24.0.11
Step 5: Run command service dns forwarding show logs | cat at DUT0 and expect this output:
Show output
-- Logs begin at Thu 2023-11-23 22:33:29 UTC, end at Thu 2023-11-23 22:33:33 UTC. -- Nov 23 22:33:31 osdx dnsmasq[25108]: dnsmasq: syntax check OK. Nov 23 22:33:31 osdx dnsmasq[25115]: started, version 2.80 cachesize 150 Nov 23 22:33:31 osdx dnsmasq[25115]: DNS service limited to local subnets Nov 23 22:33:31 osdx dnsmasq[25115]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Nov 23 22:33:31 osdx dnsmasq[25115]: warning: ignoring resolv-file flag because no-resolv is set Nov 23 22:33:31 osdx dnsmasq[25115]: using nameserver 10::2#53 Nov 23 22:33:31 osdx dnsmasq[25115]: read /etc/hosts - 1 addresses Nov 23 22:33:32 osdx dnsmasq[25115]: query[A] localhost.domain from ::1 Nov 23 22:33:32 osdx dnsmasq[25115]: forwarded localhost.domain to 10::2 Nov 23 22:33:33 osdx dnsmasq[25115]: query[A] teldat.com from ::1 Nov 23 22:33:33 osdx dnsmasq[25115]: forwarded teldat.com to 10::2 Nov 23 22:33:33 osdx dnsmasq[25115]: reply teldat.com is 172.24.0.11
Multiple Addresses
Description
Configures two DNS addresses: one invalid and the other valid. Checks that the resolution works against the second address, while the first one does not respond.
Scenario
Step 1: Set the following configuration in DUT1:
set interfaces ethernet eth0 address 10.0.0.2/24 set service dns forwarding record host teldat.com ipv4-address 172.24.0.11 set service dns forwarding record host teldat.com ipv6-address ff00::dead:cafe set service dns resolver local
Step 2: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10.0.0.1/24 set service dns forwarding logs set service dns resolver local set service dns forwarding name-server 10.0.0.10 priority 0 set service dns forwarding name-server 10.0.0.2 priority 1
Step 3: Ping IP address 10.0.0.2 from DUT0:
admin@DUT0$ ping 10.0.0.2 count 1 size 56 timeout 1Show output
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.430 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.430/0.430/0.430/0.000 ms
Step 4: Run command show host lookup teldat.com type A wait 0 at DUT0 and check if output contains the following tokens:
172.24.0.11Show output
teldat.com has address 172.24.0.11
Step 5: Run command service dns forwarding show logs | cat at DUT0 and expect this output:
Show output
-- Logs begin at Thu 2023-11-23 22:33:40 UTC, end at Thu 2023-11-23 22:33:45 UTC. -- Nov 23 22:33:42 osdx dnsmasq[25524]: dnsmasq: syntax check OK. Nov 23 22:33:43 osdx dnsmasq[25531]: started, version 2.80 cachesize 150 Nov 23 22:33:43 osdx dnsmasq[25531]: DNS service limited to local subnets Nov 23 22:33:43 osdx dnsmasq[25531]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Nov 23 22:33:43 osdx dnsmasq[25531]: warning: ignoring resolv-file flag because no-resolv is set Nov 23 22:33:43 osdx dnsmasq[25531]: using nameserver 10.0.0.10#53 Nov 23 22:33:43 osdx dnsmasq[25531]: using nameserver 10.0.0.2#53 Nov 23 22:33:43 osdx dnsmasq[25531]: read /etc/hosts - 1 addresses Nov 23 22:33:43 osdx dnsmasq[25531]: query[A] teldat.com from ::1 Nov 23 22:33:43 osdx dnsmasq[25531]: forwarded teldat.com to 10.0.0.10 Nov 23 22:33:44 osdx dnsmasq[25531]: query[A] teldat.com from 127.0.0.1 Nov 23 22:33:45 osdx dnsmasq[25531]: query[A] teldat.com from ::1 Nov 23 22:33:45 osdx dnsmasq[25531]: forwarded teldat.com to 10.0.0.2 Nov 23 22:33:45 osdx dnsmasq[25531]: reply teldat.com is 172.24.0.11
Multiple IPv6 Addresses
Description
Configures two IPv6 DNS addresses: one invalid and the other valid. Checks that the resolution works against the second address, while the first one does not respond.
Scenario
Step 1: Set the following configuration in DUT1:
set interfaces ethernet eth0 address 10::2/64 set service dns forwarding record host teldat.com ipv4-address 172.24.0.11 set service dns forwarding record host teldat.com ipv6-address ff00::dead:cafe set service dns resolver local
Step 2: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10::1/64 set service dns forwarding logs set service dns resolver local set service dns forwarding name-server 10::10 priority 0 set service dns forwarding name-server 10::2 priority 1
Step 3: Ping IP address 10::2 from DUT0:
admin@DUT0$ ping 10::2 count 1 size 56 timeout 1Show output
PING 10::2(10::2) 56 data bytes 64 bytes from 10::2: icmp_seq=1 ttl=64 time=429 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 429.106/429.106/429.106/0.000 ms
Step 4: Run command show host lookup teldat.com type A wait 0 at DUT0 and check if output contains the following tokens:
172.24.0.11Show output
teldat.com has address 172.24.0.11
Step 5: Run command service dns forwarding show logs | cat at DUT0 and expect this output:
Show output
-- Logs begin at Thu 2023-11-23 22:33:51 UTC, end at Thu 2023-11-23 22:33:57 UTC. -- Nov 23 22:33:53 osdx dnsmasq[25937]: dnsmasq: syntax check OK. Nov 23 22:33:53 osdx dnsmasq[25944]: started, version 2.80 cachesize 150 Nov 23 22:33:53 osdx dnsmasq[25944]: DNS service limited to local subnets Nov 23 22:33:53 osdx dnsmasq[25944]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Nov 23 22:33:53 osdx dnsmasq[25944]: warning: ignoring resolv-file flag because no-resolv is set Nov 23 22:33:53 osdx dnsmasq[25944]: using nameserver 10::10#53 Nov 23 22:33:53 osdx dnsmasq[25944]: using nameserver 10::2#53 Nov 23 22:33:53 osdx dnsmasq[25944]: read /etc/hosts - 1 addresses Nov 23 22:33:54 osdx dnsmasq[25944]: query[A] localhost.domain from ::1 Nov 23 22:33:54 osdx dnsmasq[25944]: forwarded localhost.domain to 10::10 Nov 23 22:33:55 osdx dnsmasq[25944]: query[A] teldat.com from ::1 Nov 23 22:33:55 osdx dnsmasq[25944]: forwarded teldat.com to 10::10 Nov 23 22:33:56 osdx dnsmasq[25944]: query[A] teldat.com from 127.0.0.1 Nov 23 22:33:57 osdx dnsmasq[25944]: query[A] teldat.com from ::1 Nov 23 22:33:57 osdx dnsmasq[25944]: forwarded teldat.com to 10::2 Nov 23 22:33:57 osdx dnsmasq[25944]: reply teldat.com is 172.24.0.11