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=0.767 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.767/0.767/0.767/0.000 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 Mon 2024-02-26 19:02:24 UTC, end at Mon 2024-02-26 19:02:28 UTC. -- Feb 26 19:02:28 osdx dnsmasq[6337]: dnsmasq: syntax check OK. Feb 26 19:02:28 osdx dnsmasq[6344]: started, version 2.80 cachesize 150 Feb 26 19:02:28 osdx dnsmasq[6344]: DNS service limited to local subnets Feb 26 19:02:28 osdx dnsmasq[6344]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Feb 26 19:02:28 osdx dnsmasq[6344]: warning: ignoring resolv-file flag because no-resolv is set Feb 26 19:02:28 osdx dnsmasq[6344]: using nameserver 10.0.0.2#53 Feb 26 19:02:28 osdx dnsmasq[6344]: read /etc/hosts - 1 addresses Feb 26 19:02:28 osdx dnsmasq[6344]: query[A] teldat.com from ::1 Feb 26 19:02:28 osdx dnsmasq[6344]: forwarded teldat.com to 10.0.0.2 Feb 26 19:02:28 osdx dnsmasq[6344]: 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=418 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 417.762/417.762/417.762/0.000 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 Mon 2024-02-26 19:02:35 UTC, end at Mon 2024-02-26 19:02:41 UTC. -- Feb 26 19:02:39 osdx dnsmasq[6788]: dnsmasq: syntax check OK. Feb 26 19:02:39 osdx dnsmasq[6795]: started, version 2.80 cachesize 150 Feb 26 19:02:39 osdx dnsmasq[6795]: DNS service limited to local subnets Feb 26 19:02:39 osdx dnsmasq[6795]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Feb 26 19:02:39 osdx dnsmasq[6795]: warning: ignoring resolv-file flag because no-resolv is set Feb 26 19:02:39 osdx dnsmasq[6795]: using nameserver 10::2#53 Feb 26 19:02:39 osdx dnsmasq[6795]: read /etc/hosts - 1 addresses Feb 26 19:02:41 osdx dnsmasq[6795]: query[A] teldat.com from ::1 Feb 26 19:02:41 osdx dnsmasq[6795]: forwarded teldat.com to 10::2 Feb 26 19:02:41 osdx dnsmasq[6795]: 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=0.963 ms --- 10.0.0.2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.963/0.963/0.963/0.000 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 Mon 2024-02-26 19:02:48 UTC, end at Mon 2024-02-26 19:02:54 UTC. -- Feb 26 19:02:52 osdx dnsmasq[7244]: dnsmasq: syntax check OK. Feb 26 19:02:52 osdx dnsmasq[7251]: started, version 2.80 cachesize 150 Feb 26 19:02:52 osdx dnsmasq[7251]: DNS service limited to local subnets Feb 26 19:02:52 osdx dnsmasq[7251]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Feb 26 19:02:52 osdx dnsmasq[7251]: warning: ignoring resolv-file flag because no-resolv is set Feb 26 19:02:52 osdx dnsmasq[7251]: using nameserver 10.0.0.10#53 Feb 26 19:02:52 osdx dnsmasq[7251]: using nameserver 10.0.0.2#53 Feb 26 19:02:52 osdx dnsmasq[7251]: read /etc/hosts - 1 addresses Feb 26 19:02:52 osdx dnsmasq[7251]: query[A] teldat.com from ::1 Feb 26 19:02:52 osdx dnsmasq[7251]: forwarded teldat.com to 10.0.0.10 Feb 26 19:02:53 osdx dnsmasq[7251]: query[A] teldat.com from 127.0.0.1 Feb 26 19:02:54 osdx dnsmasq[7251]: query[A] teldat.com from ::1 Feb 26 19:02:54 osdx dnsmasq[7251]: forwarded teldat.com to 10.0.0.2 Feb 26 19:02:54 osdx dnsmasq[7251]: 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=393 ms --- 10::2 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 392.732/392.732/392.732/0.000 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 Mon 2024-02-26 19:03:01 UTC, end at Mon 2024-02-26 19:03:09 UTC. -- Feb 26 19:03:05 osdx dnsmasq[7701]: dnsmasq: syntax check OK. Feb 26 19:03:05 osdx dnsmasq[7708]: started, version 2.80 cachesize 150 Feb 26 19:03:05 osdx dnsmasq[7708]: DNS service limited to local subnets Feb 26 19:03:05 osdx dnsmasq[7708]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile Feb 26 19:03:05 osdx dnsmasq[7708]: warning: ignoring resolv-file flag because no-resolv is set Feb 26 19:03:05 osdx dnsmasq[7708]: using nameserver 10::10#53 Feb 26 19:03:05 osdx dnsmasq[7708]: using nameserver 10::2#53 Feb 26 19:03:05 osdx dnsmasq[7708]: read /etc/hosts - 1 addresses Feb 26 19:03:07 osdx dnsmasq[7708]: query[A] teldat.com from ::1 Feb 26 19:03:07 osdx dnsmasq[7708]: forwarded teldat.com to 10::10 Feb 26 19:03:08 osdx dnsmasq[7708]: query[A] teldat.com from 127.0.0.1 Feb 26 19:03:09 osdx dnsmasq[7708]: query[A] teldat.com from ::1 Feb 26 19:03:09 osdx dnsmasq[7708]: forwarded teldat.com to 10::2 Feb 26 19:03:09 osdx dnsmasq[7708]: reply teldat.com is 172.24.0.11