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=0.522 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.522/0.522/0.522/0.000 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 2024-01-25 00:23:41 UTC, end at Thu 2024-01-25 00:23:45 UTC. -- Jan 25 00:23:45 osdx dnsmasq[14837]: dnsmasq: syntax check OK. Jan 25 00:23:45 osdx dnsmasq[14844]: started, version 2.80 cachesize 150 Jan 25 00:23:45 osdx dnsmasq[14844]: DNS service limited to local subnets Jan 25 00:23:45 osdx dnsmasq[14844]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Jan 25 00:23:45 osdx dnsmasq[14844]: warning: ignoring resolv-file flag because no-resolv is set Jan 25 00:23:45 osdx dnsmasq[14844]: using nameserver 10.0.0.2#53 Jan 25 00:23:45 osdx dnsmasq[14844]: read /etc/hosts - 1 addresses Jan 25 00:23:45 osdx dnsmasq[14844]: query[A] teldat.com from ::1 Jan 25 00:23:45 osdx dnsmasq[14844]: forwarded teldat.com to 10.0.0.2 Jan 25 00:23:45 osdx dnsmasq[14844]: 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=415 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 415.371/415.371/415.371/0.000 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 2024-01-25 00:23:51 UTC, end at Thu 2024-01-25 00:23:57 UTC. -- Jan 25 00:23:55 osdx dnsmasq[15293]: dnsmasq: syntax check OK. Jan 25 00:23:55 osdx dnsmasq[15300]: started, version 2.80 cachesize 150 Jan 25 00:23:55 osdx dnsmasq[15300]: DNS service limited to local subnets Jan 25 00:23:55 osdx dnsmasq[15300]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Jan 25 00:23:55 osdx dnsmasq[15300]: warning: ignoring resolv-file flag because no-resolv is set Jan 25 00:23:55 osdx dnsmasq[15300]: using nameserver 10::2#53 Jan 25 00:23:55 osdx dnsmasq[15300]: read /etc/hosts - 1 addresses Jan 25 00:23:55 osdx dnsmasq[15300]: query[A] localhost.domain from ::1 Jan 25 00:23:55 osdx dnsmasq[15300]: forwarded localhost.domain to 10::2 Jan 25 00:23:57 osdx dnsmasq[15300]: query[A] teldat.com from ::1 Jan 25 00:23:57 osdx dnsmasq[15300]: forwarded teldat.com to 10::2 Jan 25 00:23:57 osdx dnsmasq[15300]: 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=0.445 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.445/0.445/0.445/0.000 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 2024-01-25 00:24:03 UTC, end at Thu 2024-01-25 00:24:09 UTC. -- Jan 25 00:24:06 osdx dnsmasq[15757]: dnsmasq: syntax check OK. Jan 25 00:24:06 osdx dnsmasq[15764]: started, version 2.80 cachesize 150 Jan 25 00:24:06 osdx dnsmasq[15764]: DNS service limited to local subnets Jan 25 00:24:06 osdx dnsmasq[15764]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Jan 25 00:24:06 osdx dnsmasq[15764]: warning: ignoring resolv-file flag because no-resolv is set Jan 25 00:24:06 osdx dnsmasq[15764]: using nameserver 10.0.0.10#53 Jan 25 00:24:06 osdx dnsmasq[15764]: using nameserver 10.0.0.2#53 Jan 25 00:24:06 osdx dnsmasq[15764]: read /etc/hosts - 1 addresses Jan 25 00:24:07 osdx dnsmasq[15764]: query[A] teldat.com from ::1 Jan 25 00:24:07 osdx dnsmasq[15764]: forwarded teldat.com to 10.0.0.10 Jan 25 00:24:08 osdx dnsmasq[15764]: query[A] teldat.com from 127.0.0.1 Jan 25 00:24:09 osdx dnsmasq[15764]: query[A] teldat.com from ::1 Jan 25 00:24:09 osdx dnsmasq[15764]: forwarded teldat.com to 10.0.0.2 Jan 25 00:24:09 osdx dnsmasq[15764]: 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=0.453 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.453/0.453/0.453/0.000 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 2024-01-25 00:24:14 UTC, end at Thu 2024-01-25 00:24:21 UTC. -- Jan 25 00:24:17 osdx dnsmasq[16213]: dnsmasq: syntax check OK. Jan 25 00:24:17 osdx dnsmasq[16220]: started, version 2.80 cachesize 150 Jan 25 00:24:17 osdx dnsmasq[16220]: DNS service limited to local subnets Jan 25 00:24:17 osdx dnsmasq[16220]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Jan 25 00:24:17 osdx dnsmasq[16220]: warning: ignoring resolv-file flag because no-resolv is set Jan 25 00:24:17 osdx dnsmasq[16220]: using nameserver 10::10#53 Jan 25 00:24:17 osdx dnsmasq[16220]: using nameserver 10::2#53 Jan 25 00:24:17 osdx dnsmasq[16220]: read /etc/hosts - 1 addresses Jan 25 00:24:19 osdx dnsmasq[16220]: query[A] teldat.com from ::1 Jan 25 00:24:19 osdx dnsmasq[16220]: forwarded teldat.com to 10::10 Jan 25 00:24:20 osdx dnsmasq[16220]: query[A] localhost.domain from ::1 Jan 25 00:24:20 osdx dnsmasq[16220]: forwarded localhost.domain to 10::10 Jan 25 00:24:20 osdx dnsmasq[16220]: query[A] teldat.com from 127.0.0.1 Jan 25 00:24:21 osdx dnsmasq[16220]: query[A] teldat.com from ::1 Jan 25 00:24:21 osdx dnsmasq[16220]: forwarded teldat.com to 10::2 Jan 25 00:24:21 osdx dnsmasq[16220]: reply teldat.com is 172.24.0.11