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Mikrotik DNS failover
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| :global testDomain "dnstest.local" ;# Domain to test DNS resolution | |
| :global queryServer "192.168.1.29" ;# Specific DNS server to query, local AdGuard instance | |
| :global successDNS "192.168.1.29" ;# DNS server if the DNS request is successful, local AdGuard instance | |
| :global failureDNS "9.9.9.11" ;# DNS server if the DNS request fails, | |
| :log info "Testing DNS resolution for $testDomain using $queryServer." | |
| # Perform a DNS lookup using a specific server | |
| :do {:resolve domain-name="dnstest.local" server=$queryServer; /ip dns set servers=$successDNS; } on-error={/ip dns set servers=$failureDNS;} |
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Runs every 5 minutes in my Mikrotik router. If the local proxmox instance dies it fails DNS back to a public DNS so that the local network isn't perma-broken. dnstest.local is set up as a local DNS rewrite in AdGuard.