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1 file changed, 135 insertions
gistfile1.txt(arquivo criado)
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| 1 | + | def fw_events(file, filter_ip, filter_type, clients_dir, limit): | |
| 2 | + | """Format firewall drop events with dedup and counts""" | |
| 3 | + | import glob | |
| 4 | + | proto_map = {1: 'icmp', 6: 'tcp', 17: 'udp'} | |
| 5 | + | ||
| 6 | + | ip_to_name = {} | |
| 7 | + | for conf in glob.glob(f"{clients_dir}/*.conf"): | |
| 8 | + | name = os.path.basename(conf).replace('.conf', '') | |
| 9 | + | try: | |
| 10 | + | with open(conf) as f: | |
| 11 | + | for line in f: | |
| 12 | + | if line.startswith('Address'): | |
| 13 | + | ip = line.split('=')[1].strip().split('/')[0] | |
| 14 | + | ip_to_name[ip] = name | |
| 15 | + | except: | |
| 16 | + | pass | |
| 17 | + | ||
| 18 | + | events = [] | |
| 19 | + | last_seen = {} | |
| 20 | + | ||
| 21 | + | try: | |
| 22 | + | with open(file) as f: | |
| 23 | + | for line in f: | |
| 24 | + | try: | |
| 25 | + | e = json.loads(line.strip()) | |
| 26 | + | src = e.get('src_ip', '') | |
| 27 | + | if not src: | |
| 28 | + | continue | |
| 29 | + | if filter_ip and src != filter_ip: | |
| 30 | + | continue | |
| 31 | + | dst = e.get('dest_ip', '') | |
| 32 | + | port = e.get('dest_port', '') | |
| 33 | + | proto = e.get('ip.protocol', 0) | |
| 34 | + | key = (src, dst, port, proto) | |
| 35 | + | ts_str = e.get('timestamp', '') | |
| 36 | + | try: | |
| 37 | + | from datetime import datetime | |
| 38 | + | ts = datetime.fromisoformat(ts_str).timestamp() | |
| 39 | + | except: | |
| 40 | + | ts = 0 | |
| 41 | + | windows = {1: 5, 6: 30, 17: 10} | |
| 42 | + | window = windows.get(proto, 10) | |
| 43 | + | if key in last_seen and (ts - last_seen[key]) < window: | |
| 44 | + | continue | |
| 45 | + | last_seen[key] = ts | |
| 46 | + | events.append(e) | |
| 47 | + | except: | |
| 48 | + | pass | |
| 49 | + | except: | |
| 50 | + | pass | |
| 51 | + | ||
| 52 | + | # Dedup consecutive same src+dst+port within 60s with count | |
| 53 | + | deduped = [] | |
| 54 | + | counts = [] | |
| 55 | + | for e in events: | |
| 56 | + | ts_str = e.get('timestamp', '') | |
| 57 | + | try: | |
| 58 | + | from datetime import datetime | |
| 59 | + | ts = datetime.fromisoformat(ts_str).timestamp() | |
| 60 | + | except: | |
| 61 | + | ts = 0 | |
| 62 | + | src = e.get('src_ip', '') | |
| 63 | + | dst = e.get('dest_ip', '') | |
| 64 | + | port = e.get('dest_port', '') | |
| 65 | + | proto = e.get('ip.protocol', 0) | |
| 66 | + | key = (src, dst, port, proto) | |
| 67 | + | ||
| 68 | + | if deduped and counts: | |
| 69 | + | prev = deduped[-1] | |
| 70 | + | try: | |
| 71 | + | prev_ts = datetime.fromisoformat(prev.get('timestamp','')).timestamp() | |
| 72 | + | except: | |
| 73 | + | prev_ts = 0 | |
| 74 | + | prev_key = (prev.get('src_ip',''), prev.get('dest_ip',''), | |
| 75 | + | prev.get('dest_port',''), prev.get('ip.protocol',0)) | |
| 76 | + | if key == prev_key and (ts - prev_ts) < 60: | |
| 77 | + | counts[-1] += 1 | |
| 78 | + | continue | |
| 79 | + | ||
| 80 | + | deduped.append(e) | |
| 81 | + | counts.append(1) | |
| 82 | + | ||
| 83 | + | grouped = [] | |
| 84 | + | group_counts = [] | |
| 85 | + | for e in deduped: | |
| 86 | + | ts_str = e.get('timestamp', '') | |
| 87 | + | try: | |
| 88 | + | from datetime import datetime | |
| 89 | + | dt = datetime.fromisoformat(ts_str) | |
| 90 | + | # Truncate to minute for grouping | |
| 91 | + | minute_key = dt.strftime('%Y-%m-%d %H:%M') | |
| 92 | + | except: | |
| 93 | + | minute_key = ts_str[:16] | |
| 94 | + | ||
| 95 | + | src = e.get('src_ip', '') | |
| 96 | + | dst = e.get('dest_ip', '') | |
| 97 | + | port = e.get('dest_port', '') | |
| 98 | + | proto = e.get('ip.protocol', 0) | |
| 99 | + | key = (minute_key, src, dst, proto) # group within same minute | |
| 100 | + | ||
| 101 | + | if grouped and group_counts: | |
| 102 | + | prev = grouped[-1] | |
| 103 | + | try: | |
| 104 | + | prev_dt = datetime.fromisoformat(prev.get('timestamp','')) | |
| 105 | + | prev_minute = prev_dt.strftime('%Y-%m-%d %H:%M') | |
| 106 | + | except: | |
| 107 | + | prev_minute = '' | |
| 108 | + | prev_key = (prev_minute, prev.get('src_ip',''), | |
| 109 | + | prev.get('dest_ip',''), prev.get('ip.protocol',0)) | |
| 110 | + | if key == prev_key: | |
| 111 | + | group_counts[-1] += 1 | |
| 112 | + | continue | |
| 113 | + | ||
| 114 | + | grouped.append(e) | |
| 115 | + | group_counts.append(1) | |
| 116 | + | ||
| 117 | + | for e, count in zip(deduped[-int(limit):], counts[-int(limit):]): | |
| 118 | + | ts = e.get('timestamp', '') | |
| 119 | + | try: | |
| 120 | + | from datetime import datetime | |
| 121 | + | dt = datetime.fromisoformat(ts) | |
| 122 | + | ts = dt.strftime(DATETIME_FMT) | |
| 123 | + | except: | |
| 124 | + | pass | |
| 125 | + | src = e.get('src_ip', '—') | |
| 126 | + | dst = e.get('dest_ip', '—') | |
| 127 | + | port = e.get('dest_port', '') | |
| 128 | + | proto_num = e.get('ip.protocol', 0) | |
| 129 | + | proto = proto_map.get(proto_num, str(proto_num)) | |
| 130 | + | dst_str = f"{dst}:{port}" if port else dst | |
| 131 | + | client = ip_to_name.get(src, src) | |
| 132 | + | if filter_type and not client.startswith(filter_type + '-'): | |
| 133 | + | continue | |
| 134 | + | count_str = f" (x{count})" if count > 1 else "" | |
| 135 | + | print(f"{ts}|{client}|{dst_str}|{proto}{count_str}") | |
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