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47 lines
1.3 KiB
Bash
Executable File
47 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# This script deprecates ydns6 which does dualstack and which I won't
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# be updating anymore as IPv4 is always behind NAT and thus useless to me.
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# This script is based on cf-ddns.sh found at
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# <https://gist.github.com/larrybolt/6295160> and it's comments.
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# Inspiration also took from
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# <https://github.com/commx/ydns/blob/master/updater.sh> which is a lot
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# more complex than this.
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# Basic usage:
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# mkdir -p ~/.local/bin
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# curl -L https://github.com/Mikaela/scripts/raw/gh-pages/bash/ydns6 > ~/.local/bin/ydns6
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# chmod 700 ~/.local/bin/ydns6
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## Copy-paste the following to your crontab without the #
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# */5 * * * * PATH_TO_HOME_DIRECTORY_HERE/.local/bin/ydns6 >/dev/null 2>&1
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# yDNS details
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USEREMAIL=""
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PASSWORD=""
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HOSTNAME=""
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# Get IPv6 address
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if hash dig 2>/dev/null; then
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WAN_IP6=$(dig +short myip.opendns.com. AAAA @2620:0:ccd::2)
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else
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WAN_IP6=$(curl -sL6 https://icanhazip.com/)
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fi
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if [ -f $HOME/.wan_ip6-ydns.txt ]; then
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OLD_WAN_IP6=$(cat $HOME/.wan_ip6-ydns.txt)
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else
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echo "No file, need IP6"
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OLD_WAN_IP6=""
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fi
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# Update IPv6
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if [ "$WAN_IP6" = "$OLD_WAN_IP6" ]; then
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echo "IP6 Unchanged"
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else
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echo $WAN_IP6 > $HOME/.wan_ip6-ydns.txt
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echo "Updating DNS to $WAN_IP6"
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curl -6 --basic -u "$USEREMAIL:$PASSWORD" --silent \
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https://ydns.eu/api/v1/update/?host=$HOSTNAME
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fi
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