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#!/bin/bash
# === Config ===
LOG="/var/log/fail2ban.log"
MASTODON_URL="https://chatwithus.live"
MASTODON_TOKEN="DsusOr2Gr6UN-sgssHD1XOJr5q9eCbe95fYxUDPM9EQ"
BAN_CACHE="/var/tmp/teamtalk_ban_cache.txt"
UNBAN_CACHE="/var/tmp/teamtalk_unban_cache.txt"
TTL=604800 # 7 days in seconds
# === Functions ===
send_dm() {
curl -s -X POST "$MASTODON_URL/api/v1/statuses" \
-H "Authorization: Bearer $MASTODON_TOKEN" \
-F "status=$1" \
-F "visibility=direct" > /dev/null
}
send_log_post() {
curl -s -X POST "$MASTODON_URL/api/v1/statuses" \
-H "Authorization: Bearer $MASTODON_TOKEN" \
-F "status=$1" \
-F "visibility=unlisted" > /dev/null
}
cleanup_cache() {
local cache_file="$1"
local now=$(date +%s)
local temp_file=$(mktemp)
while IFS="|" read -r ip timestamp; do
[[ -z "$ip" || -z "$timestamp" ]] && continue
if (( now - timestamp < TTL )); then
echo "$ip|$timestamp" >> "$temp_file"
fi
done < "$cache_file"
mv "$temp_file" "$cache_file"
}
log_recent_ips() {
local keyword="$1" # Ban or Unban
grep "$keyword" "$LOG" | grep 'teamtalk' | awk -v now="$(date +%s)" '
{
cmd = "date +%s -d \"" $1 " " $2 "\""
cmd | getline timestamp
close(cmd)
if ((now - timestamp) <= 3600) {
print $NF
}
}
' | sort -u
}
# === Init Caches ===
touch "$BAN_CACHE"
touch "$UNBAN_CACHE"
cleanup_cache "$BAN_CACHE"
cleanup_cache "$UNBAN_CACHE"
# === Process Bans ===
log_recent_ips "Ban" | while read ip; do
if ! grep -q "^$ip|" "$BAN_CACHE"; then
echo "$ip|$(date +%s)" >> "$BAN_CACHE"
send_dm "🚫 GenesisShield TeamTalk Fail2Ban alert: Banned IP $ip"
send_log_post "🚫 #GenesisShield TeamTalk Banned IP $ip at $(date -Is)"
fi
done
# === Process Unbans ===
log_recent_ips "Unban" | while read ip; do
if ! grep -q "^$ip|" "$UNBAN_CACHE"; then
echo "$ip|$(date +%s)" >> "$UNBAN_CACHE"
send_dm "✅ TeamTalk Fail2Ban alert: IP $ip has been unbanned"
send_log_post "✅ #GenesisShield TeamTalk Unbanned IP $ip at $(date -Is)"
fi
done
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