Hello Christian,

I made some tests, and Cloudflare 1.1.1.1 works fine.

Test 1: Setting the router's primary DNS server to Cloudflare 1.1.1.1 with Sculpt 20.08 default network settings in Virtualbox Using Falkon to browse the Internet

The relevant /config/nic_router: <config verbose_domain_state="yes"> <report interval_sec="5" bytes="yes" config="yes" config_triggers="yes"/> <default-policy domain="default"/> <uplink label="wired" domain="uplink"/> <domain name="uplink"> <nat domain="default" tcp-ports="1000" udp-ports="1000" icmp-ids="1000"/> </domain> <domain name="default" interface="10.0.1.1/24"> <dhcp-server ip_first="10.0.1.2" ip_last="10.0.1.200" dns_server_from="uplink"/> <tcp dst="0.0.0.0/0"> <permit-any domain="uplink"/> </tcp> <udp dst="0.0.0.0/0"> <permit-any domain="uplink"/> </udp> <icmp dst="0.0.0.0/0" domain="uplink"/> </domain> </config>

Test 1 result: Network is fully operational.

Test 2: Setting the primary DNS server to 1.1.1.1 from Sculpt 20.08 in Virtualbox while the router has a different primary DNS server (Cloudflare 1.0.0.1) Using Falkon to browse the Internet

The relevant /config/nic_router: <config verbose_domain_state="yes"> <report interval_sec="5" bytes="yes" config="yes" config_triggers="yes"/> <default-policy domain="default"/> <uplink label="wired" domain="uplink"/> <domain name="uplink"> <nat domain="default" tcp-ports="1000" udp-ports="1000" icmp-ids="1000"/> </domain> <domain name="default" interface="10.0.1.1/24"> <dhcp-server ip_first="10.0.1.2" ip_last="10.0.1.200" dns_server="1.1.1.1"/> <tcp dst="0.0.0.0/0"> <permit-any domain="uplink"/> </tcp> <udp dst="0.0.0.0/0"> <permit-any domain="uplink"/> </udp> <icmp dst="0.0.0.0/0" domain="uplink"/> </domain> </config>

Test 2 result: Network is fully operational.

Best regards, Dima Sokolov