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=0.541 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.541/0.541/0.541/0.000 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 2024-10-10 07:04:09 UTC, end at Thu 2024-10-10 07:04:13 UTC. -- Oct 10 07:04:12 osdx dnsmasq[15565]: dnsmasq: syntax check OK. Oct 10 07:04:12 osdx dnsmasq[15572]: started, version 2.80 cachesize 150 Oct 10 07:04:12 osdx dnsmasq[15572]: DNS service limited to local subnets Oct 10 07:04:12 osdx dnsmasq[15572]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Oct 10 07:04:12 osdx dnsmasq[15572]: warning: ignoring resolv-file flag because no-resolv is set Oct 10 07:04:12 osdx dnsmasq[15572]: using nameserver 10.0.0.2#53 Oct 10 07:04:12 osdx dnsmasq[15572]: read /etc/hosts - 1 addresses Oct 10 07:04:13 osdx dnsmasq[15572]: query[A] teldat.com from ::1 Oct 10 07:04:13 osdx dnsmasq[15572]: forwarded teldat.com to 10.0.0.2 Oct 10 07:04:13 osdx dnsmasq[15572]: 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=0.619 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.619/0.619/0.619/0.000 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 2024-10-10 07:04:19 UTC, end at Thu 2024-10-10 07:04:25 UTC. -- Oct 10 07:04:23 osdx dnsmasq[16000]: dnsmasq: syntax check OK. Oct 10 07:04:23 osdx dnsmasq[16007]: started, version 2.80 cachesize 150 Oct 10 07:04:23 osdx dnsmasq[16007]: DNS service limited to local subnets Oct 10 07:04:23 osdx dnsmasq[16007]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Oct 10 07:04:23 osdx dnsmasq[16007]: warning: ignoring resolv-file flag because no-resolv is set Oct 10 07:04:23 osdx dnsmasq[16007]: using nameserver 10::2#53 Oct 10 07:04:23 osdx dnsmasq[16007]: read /etc/hosts - 1 addresses Oct 10 07:04:25 osdx dnsmasq[16007]: query[A] teldat.com from ::1 Oct 10 07:04:25 osdx dnsmasq[16007]: forwarded teldat.com to 10::2 Oct 10 07:04:25 osdx dnsmasq[16007]: 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=0.500 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.500/0.500/0.500/0.000 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 2024-10-10 07:04:30 UTC, end at Thu 2024-10-10 07:04:36 UTC. -- Oct 10 07:04:33 osdx dnsmasq[16439]: dnsmasq: syntax check OK. Oct 10 07:04:33 osdx dnsmasq[16446]: started, version 2.80 cachesize 150 Oct 10 07:04:33 osdx dnsmasq[16446]: DNS service limited to local subnets Oct 10 07:04:33 osdx dnsmasq[16446]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Oct 10 07:04:33 osdx dnsmasq[16446]: warning: ignoring resolv-file flag because no-resolv is set Oct 10 07:04:33 osdx dnsmasq[16446]: using nameserver 10.0.0.10#53 Oct 10 07:04:33 osdx dnsmasq[16446]: using nameserver 10.0.0.2#53 Oct 10 07:04:33 osdx dnsmasq[16446]: read /etc/hosts - 1 addresses Oct 10 07:04:34 osdx dnsmasq[16446]: query[A] teldat.com from ::1 Oct 10 07:04:34 osdx dnsmasq[16446]: forwarded teldat.com to 10.0.0.10 Oct 10 07:04:35 osdx dnsmasq[16446]: query[A] teldat.com from 127.0.0.1 Oct 10 07:04:36 osdx dnsmasq[16446]: query[A] teldat.com from ::1 Oct 10 07:04:36 osdx dnsmasq[16446]: forwarded teldat.com to 10.0.0.2 Oct 10 07:04:36 osdx dnsmasq[16446]: 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=443 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 442.957/442.957/442.957/0.000 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 2024-10-10 07:04:42 UTC, end at Thu 2024-10-10 07:04:50 UTC. -- Oct 10 07:04:46 osdx dnsmasq[16875]: dnsmasq: syntax check OK. Oct 10 07:04:46 osdx dnsmasq[16882]: started, version 2.80 cachesize 150 Oct 10 07:04:46 osdx dnsmasq[16882]: DNS service limited to local subnets Oct 10 07:04:46 osdx dnsmasq[16882]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Oct 10 07:04:46 osdx dnsmasq[16882]: warning: ignoring resolv-file flag because no-resolv is set Oct 10 07:04:46 osdx dnsmasq[16882]: using nameserver 10::10#53 Oct 10 07:04:46 osdx dnsmasq[16882]: using nameserver 10::2#53 Oct 10 07:04:46 osdx dnsmasq[16882]: read /etc/hosts - 1 addresses Oct 10 07:04:48 osdx dnsmasq[16882]: query[A] teldat.com from ::1 Oct 10 07:04:48 osdx dnsmasq[16882]: forwarded teldat.com to 10::10 Oct 10 07:04:49 osdx dnsmasq[16882]: query[A] teldat.com from 127.0.0.1 Oct 10 07:04:50 osdx dnsmasq[16882]: query[A] teldat.com from ::1 Oct 10 07:04:50 osdx dnsmasq[16882]: forwarded teldat.com to 10::2 Oct 10 07:04:50 osdx dnsmasq[16882]: reply teldat.com is 172.24.0.11