Created
January 19, 2022 13:36
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Script to configure DNS entries for all network adapters on macOS
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| #!/bin/bash -e | |
| while IFS= read -r adapter_name; do | |
| echo "DNS Servers configured on $adapter_name:" | |
| eval "networksetup -getdnsservers \"$adapter_name\"" | |
| echo "" | |
| echo "Search domain configured on $adapter_name..." | |
| eval "networksetup -getsearchdomains \"$adapter_name\"" | |
| echo "" | |
| echo "" | |
| done < <(networksetup -listallhardwareports | grep -i 'hardware port:' | egrep -i -v 'thunderbolt|bridge' | cut -c 16-) |
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| #!/bin/bash -e | |
| dns_servers=${1:-'8.8.8.8 8.8.4.4'} | |
| search_domain=${2:-''} | |
| echo "DNS Servers to be used: $dns_servers" | |
| echo "Search domain to be used: $search_domain" | |
| echo "" | |
| while IFS= read -r adapter_name; do | |
| echo "Setting DNS for $adapter_name..." | |
| eval "networksetup -setdnsservers \"$adapter_name\" $dns_servers" | |
| if [[ ! -z "$search_domain" ]]; then | |
| echo "Setting search domain for $adapter_name..." | |
| eval "networksetup -setsearchdomains \"$adapter_name\" $search_domain" | |
| fi | |
| echo "" | |
| # The oneliner below gets all possible network hardware ports and removes the | |
| # "generic" thunderbolt as well as the bridge ones, to make sure we only configure | |
| # the DNS on actual networking devices (includes any Thunderbolt/USB-C network adapter) | |
| done < <(networksetup -listallhardwareports | grep -i 'hardware port:' | egrep -i -v 'thunderbolt|bridge' | cut -c 16-) | |
| echo "Flushing DNS cache and killind DNS service..." | |
| sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder | |
| echo "Done!" |
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