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=0.606 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.606/0.606/0.606/0.000 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 Wed 2024-04-03 21:48:19 UTC, end at Wed 2024-04-03 21:48:22 UTC. -- Apr 03 21:48:21 osdx dnsmasq[10093]: dnsmasq: syntax check OK. Apr 03 21:48:21 osdx dnsmasq[10100]: started, version 2.80 cachesize 150 Apr 03 21:48:21 osdx dnsmasq[10100]: DNS service limited to local subnets Apr 03 21:48:21 osdx dnsmasq[10100]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Apr 03 21:48:21 osdx dnsmasq[10100]: warning: ignoring resolv-file flag because no-resolv is set Apr 03 21:48:21 osdx dnsmasq[10100]: using nameserver 10.0.0.2#53 Apr 03 21:48:21 osdx dnsmasq[10100]: read /etc/hosts - 1 addresses Apr 03 21:48:22 osdx dnsmasq[10100]: query[A] teldat.com from ::1 Apr 03 21:48:22 osdx dnsmasq[10100]: forwarded teldat.com to 10.0.0.2 Apr 03 21:48:22 osdx dnsmasq[10100]: 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=0.577 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.577/0.577/0.577/0.000 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 Wed 2024-04-03 21:48:28 UTC, end at Wed 2024-04-03 21:48:32 UTC. -- Apr 03 21:48:30 osdx dnsmasq[10505]: dnsmasq: syntax check OK. Apr 03 21:48:30 osdx dnsmasq[10512]: started, version 2.80 cachesize 150 Apr 03 21:48:30 osdx dnsmasq[10512]: DNS service limited to local subnets Apr 03 21:48:30 osdx dnsmasq[10512]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Apr 03 21:48:30 osdx dnsmasq[10512]: warning: ignoring resolv-file flag because no-resolv is set Apr 03 21:48:30 osdx dnsmasq[10512]: using nameserver 10::2#53 Apr 03 21:48:30 osdx dnsmasq[10512]: read /etc/hosts - 1 addresses Apr 03 21:48:32 osdx dnsmasq[10512]: query[A] teldat.com from ::1 Apr 03 21:48:32 osdx dnsmasq[10512]: forwarded teldat.com to 10::2 Apr 03 21:48:32 osdx dnsmasq[10512]: 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=1.30 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 1.295/1.295/1.295/0.000 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 Wed 2024-04-03 21:48:39 UTC, end at Wed 2024-04-03 21:48:44 UTC. -- Apr 03 21:48:42 osdx dnsmasq[10922]: dnsmasq: syntax check OK. Apr 03 21:48:42 osdx dnsmasq[10929]: started, version 2.80 cachesize 150 Apr 03 21:48:42 osdx dnsmasq[10929]: DNS service limited to local subnets Apr 03 21:48:42 osdx dnsmasq[10929]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Apr 03 21:48:42 osdx dnsmasq[10929]: warning: ignoring resolv-file flag because no-resolv is set Apr 03 21:48:42 osdx dnsmasq[10929]: using nameserver 10.0.0.10#53 Apr 03 21:48:42 osdx dnsmasq[10929]: using nameserver 10.0.0.2#53 Apr 03 21:48:42 osdx dnsmasq[10929]: read /etc/hosts - 1 addresses Apr 03 21:48:42 osdx dnsmasq[10929]: query[A] teldat.com from ::1 Apr 03 21:48:42 osdx dnsmasq[10929]: forwarded teldat.com to 10.0.0.10 Apr 03 21:48:43 osdx dnsmasq[10929]: query[A] teldat.com from 127.0.0.1 Apr 03 21:48:44 osdx dnsmasq[10929]: query[A] localhost.domain from ::1 Apr 03 21:48:44 osdx dnsmasq[10929]: forwarded localhost.domain to 10.0.0.10 Apr 03 21:48:44 osdx dnsmasq[10929]: query[A] teldat.com from ::1 Apr 03 21:48:44 osdx dnsmasq[10929]: forwarded teldat.com to 10.0.0.2 Apr 03 21:48:44 osdx dnsmasq[10929]: 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=397 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 397.267/397.267/397.267/0.000 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 Wed 2024-04-03 21:48:50 UTC, end at Wed 2024-04-03 21:48:57 UTC. -- Apr 03 21:48:52 osdx dnsmasq[11337]: dnsmasq: syntax check OK. Apr 03 21:48:52 osdx dnsmasq[11344]: started, version 2.80 cachesize 150 Apr 03 21:48:52 osdx dnsmasq[11344]: DNS service limited to local subnets Apr 03 21:48:52 osdx dnsmasq[11344]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Apr 03 21:48:52 osdx dnsmasq[11344]: warning: ignoring resolv-file flag because no-resolv is set Apr 03 21:48:52 osdx dnsmasq[11344]: using nameserver 10::10#53 Apr 03 21:48:52 osdx dnsmasq[11344]: using nameserver 10::2#53 Apr 03 21:48:52 osdx dnsmasq[11344]: read /etc/hosts - 1 addresses Apr 03 21:48:54 osdx dnsmasq[11344]: query[A] localhost.domain from ::1 Apr 03 21:48:54 osdx dnsmasq[11344]: forwarded localhost.domain to 10::10 Apr 03 21:48:55 osdx dnsmasq[11344]: query[A] teldat.com from ::1 Apr 03 21:48:55 osdx dnsmasq[11344]: forwarded teldat.com to 10::10 Apr 03 21:48:56 osdx dnsmasq[11344]: query[A] teldat.com from 127.0.0.1 Apr 03 21:48:57 osdx dnsmasq[11344]: query[A] teldat.com from ::1 Apr 03 21:48:57 osdx dnsmasq[11344]: forwarded teldat.com to 10::2 Apr 03 21:48:57 osdx dnsmasq[11344]: reply teldat.com is 172.24.0.11