Franziska Kunsmann
bd10dc578f
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We don't care about what the DNS provider said when updating the ip address. The only thing we care about is wether the current external ip of the system matches the resolved ip address.
20 lines
570 B
Bash
20 lines
570 B
Bash
#!/bin/bash
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[[ -n "$DEBUG" ]] && set -x
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interface="$(ip link show | awk '/ ppp/ {print substr($2, 1, length($2)-1)}')"
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addr="$(ip addr show dev "$interface" | awk '/inet / {print $2}')"
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resolved="$(dig +short "${domain}" A)"
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if [[ -z "$addr" ]] || [[ -z "$resolved" ]]
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then
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echo "Address on '$interface' is '$addr' - resolved '$resolved'"
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exit 3
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elif [[ "$addr" == "$resolved" ]]
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then
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echo "Resolved IP for ${domain} matches current ip on $interface"
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exit 0
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else
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echo "Resolved $resolved for ${domain}, but got $addr on $interface!"
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exit 2
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fi
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