27 lines
464 B
Bash
Executable File
27 lines
464 B
Bash
Executable File
#!/usr/bin/env bash
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#
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# resolve-spf-ips.sh
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# ------------------
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# Holt alle ip4:/ip6:-Einträge aus dem SPF-TXT-Record
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# einer Domain (z.B. spf.crsend.com).
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#
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# Usage:
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# resolve-spf-ips.sh spf.crsend.com
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set -e
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DOMAIN="$1"
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if [[ -z "$DOMAIN" ]]; then
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echo "Usage: $0 <domain>" >&2
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exit 1
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fi
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dig +short TXT "$DOMAIN" \
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| tr -d '"' \
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| sed -n 's/.*v=spf1 //p' \
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| tr ' ' '\n' \
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| grep -E '^(ip4|ip6):' \
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| sed -E 's/^ip[46]://' \
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| sort -u
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