be656900c0
All checks were successful
Build and Deploy / build-and-deploy (push) Successful in 2m13s
- IP138 在线 API + ip2region 离线库双通道归属地解析，60 秒熔断降级 - 5 条异常检测规则：地区不对/不可能旅行/频繁登录/团队遍地开花/海外IP太杂 - 飞书 interactive 卡片告警（红色严重/橙色警告），含辅助指标 - R2 自动封禁用户、R4 自动封禁团队，封禁即踢下线 - 系统设置页全局配置 + 团队详情页独立阈值覆盖 - 安全日志页面 + 管理员修改密码入口 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
312 lines
10 KiB
Python
312 lines
10 KiB
Python
"""登录异常检测引擎 — R1-R5 规则检测 + 封禁 + 告警冷却。"""
|
||
|
||
import logging
|
||
import threading
|
||
from datetime import timedelta
|
||
|
||
from django.utils import timezone
|
||
|
||
logger = logging.getLogger(__name__)
|
||
|
||
|
||
def _is_domestic(record) -> bool:
|
||
"""国内 IP：有国家且为中国。"""
|
||
return record.geo_country in ('中国', 'CN', 'China') and record.geo_city != ''
|
||
|
||
|
||
def _is_overseas(record) -> bool:
|
||
"""海外 IP：有国家且不是中国。"""
|
||
return record.geo_country != '' and record.geo_country not in ('中国', 'CN', 'China', '')
|
||
|
||
|
||
def _is_skip(record) -> bool:
|
||
"""内网 IP 或归属地解析失败。"""
|
||
return record.geo_source in ('skip', 'failed', '')
|
||
|
||
|
||
def _get_config(team, global_config):
|
||
"""获取团队级或全局默认的阈值配置。"""
|
||
from apps.accounts.models import TeamAnomalyConfig
|
||
|
||
team_cfg = None
|
||
try:
|
||
team_cfg = team.anomaly_config
|
||
except TeamAnomalyConfig.DoesNotExist:
|
||
pass
|
||
|
||
def _val(team_field, global_field):
|
||
if team_cfg:
|
||
v = getattr(team_cfg, team_field, None)
|
||
if v is not None:
|
||
return v
|
||
return getattr(global_config, global_field)
|
||
|
||
return {
|
||
'r1_enabled': _val('r1_enabled', 'r1_enabled_default'),
|
||
'r2_enabled': _val('r2_enabled', 'r2_enabled_default'),
|
||
'r2_window': _val('r2_window_seconds', 'r2_window_seconds'),
|
||
'r3_enabled': _val('r3_enabled', 'r3_enabled_default'),
|
||
'r3_window': _val('r3_window_seconds', 'r3_window_seconds'),
|
||
'r3_max_count': _val('r3_max_count', 'r3_max_count'),
|
||
'r4_enabled': _val('r4_enabled', 'r4_enabled_default'),
|
||
'r4_window': _val('r4_window_seconds', 'r4_window_seconds'),
|
||
'r4_city_count': _val('r4_city_count', 'r4_city_count'),
|
||
'r5_enabled': _val('r5_enabled', 'r5_enabled_default'),
|
||
'r5_days': _val('r5_days', 'r5_days'),
|
||
'r5_country_count': _val('r5_country_count', 'r5_country_count'),
|
||
}
|
||
|
||
|
||
def check_login_anomaly(login_record):
|
||
"""检测登录异常，返回 [(level, rule, detail), ...]。"""
|
||
from apps.accounts.models import LoginRecord
|
||
from apps.generation.models import QuotaConfig
|
||
|
||
user = login_record.user
|
||
team = login_record.team
|
||
|
||
if not team:
|
||
return []
|
||
|
||
# 用户或团队已被封禁 → 跳过检测
|
||
if not user.is_active or not team.is_active:
|
||
return []
|
||
|
||
try:
|
||
global_config = QuotaConfig.objects.get(pk=1)
|
||
except QuotaConfig.DoesNotExist:
|
||
return []
|
||
|
||
if not global_config.anomaly_detection_enabled:
|
||
return []
|
||
|
||
cfg = _get_config(team, global_config)
|
||
anomalies = []
|
||
|
||
is_domestic = _is_domestic(login_record)
|
||
is_overseas = _is_overseas(login_record)
|
||
is_skip_ip = _is_skip(login_record)
|
||
|
||
if is_skip_ip:
|
||
# 内网 IP 跳过所有规则
|
||
return []
|
||
|
||
# ── R1：登录地区不对 ──
|
||
if cfg['r1_enabled'] and is_domestic:
|
||
expected = team.expected_regions
|
||
if expected:
|
||
expected_cities = [c.strip() for c in expected.split(',') if c.strip()]
|
||
if expected_cities and login_record.geo_city not in expected_cities:
|
||
anomalies.append((
|
||
'warning', 'region_mismatch',
|
||
{
|
||
'ip': login_record.ip_address,
|
||
'city': login_record.geo_city,
|
||
'province': login_record.geo_province,
|
||
'expected': expected_cities,
|
||
}
|
||
))
|
||
|
||
# ── R2：不可能的旅行 ──
|
||
if cfg['r2_enabled'] and is_domestic:
|
||
window = timezone.now() - timedelta(seconds=cfg['r2_window'])
|
||
recent = LoginRecord.objects.filter(
|
||
user=user,
|
||
created_at__gte=window,
|
||
geo_source__in=['online', 'offline'],
|
||
).exclude(pk=login_record.pk).exclude(
|
||
geo_city=''
|
||
).values_list('geo_city', flat=True).distinct()
|
||
|
||
for prev_city in recent:
|
||
if prev_city and login_record.geo_city and prev_city != login_record.geo_city:
|
||
# 只在双方都是国内 IP 时比较
|
||
anomalies.append((
|
||
'critical', 'impossible_travel',
|
||
{
|
||
'ip': login_record.ip_address,
|
||
'current_city': login_record.geo_city,
|
||
'previous_city': prev_city,
|
||
'window_seconds': cfg['r2_window'],
|
||
}
|
||
))
|
||
break # 只报一次
|
||
|
||
# ── R3：登录太频繁 ──
|
||
if cfg['r3_enabled']:
|
||
window = timezone.now() - timedelta(seconds=cfg['r3_window'])
|
||
count = LoginRecord.objects.filter(
|
||
user=user,
|
||
created_at__gte=window,
|
||
).count()
|
||
if count > cfg['r3_max_count']:
|
||
anomalies.append((
|
||
'warning', 'login_frequency',
|
||
{
|
||
'ip': login_record.ip_address,
|
||
'count': count,
|
||
'window_seconds': cfg['r3_window'],
|
||
'threshold': cfg['r3_max_count'],
|
||
}
|
||
))
|
||
|
||
# ── R4：团队遍地开花 ──
|
||
if cfg['r4_enabled'] and is_domestic:
|
||
expected = team.expected_regions
|
||
expected_cities = [c.strip() for c in expected.split(',') if c.strip()] if expected else []
|
||
window = timezone.now() - timedelta(seconds=cfg['r4_window'])
|
||
|
||
team_cities = LoginRecord.objects.filter(
|
||
team=team,
|
||
created_at__gte=window,
|
||
geo_source__in=['online', 'offline'],
|
||
).exclude(
|
||
geo_city=''
|
||
).exclude(
|
||
geo_country__in=['', '0']
|
||
).filter(
|
||
geo_country__in=['中国', 'CN', 'China']
|
||
).values_list('geo_city', flat=True).distinct()
|
||
|
||
unexpected_cities = [c for c in team_cities if c not in expected_cities]
|
||
if len(unexpected_cities) >= cfg['r4_city_count']:
|
||
anomalies.append((
|
||
'critical', 'multi_city',
|
||
{
|
||
'unexpected_cities': unexpected_cities,
|
||
'expected_cities': expected_cities,
|
||
'count': len(unexpected_cities),
|
||
'threshold': cfg['r4_city_count'],
|
||
'window_seconds': cfg['r4_window'],
|
||
}
|
||
))
|
||
|
||
# ── R5：海外IP太杂 ──
|
||
if cfg['r5_enabled'] and is_overseas:
|
||
since = timezone.now() - timedelta(days=cfg['r5_days'])
|
||
overseas_countries = LoginRecord.objects.filter(
|
||
team=team,
|
||
created_at__gte=since,
|
||
geo_source__in=['online', 'offline'],
|
||
).exclude(
|
||
geo_country__in=['中国', 'CN', 'China', '', '0']
|
||
).values_list('geo_country', flat=True).distinct()
|
||
|
||
country_list = list(overseas_countries)
|
||
if len(country_list) >= cfg['r5_country_count']:
|
||
anomalies.append((
|
||
'warning', 'overseas_ip_diversity',
|
||
{
|
||
'countries': country_list,
|
||
'count': len(country_list),
|
||
'threshold': cfg['r5_country_count'],
|
||
'days': cfg['r5_days'],
|
||
}
|
||
))
|
||
|
||
return anomalies
|
||
|
||
|
||
def _disable_user(user):
|
||
"""封禁用户 — 设 is_active=False + 清除所有会话。"""
|
||
from apps.accounts.models import ActiveSession
|
||
|
||
user.is_active = False
|
||
user.disabled_by = 'system'
|
||
user.save(update_fields=['is_active', 'disabled_by'])
|
||
ActiveSession.objects.filter(user=user).delete()
|
||
logger.info('User %s disabled by anomaly detection', user.username)
|
||
|
||
|
||
def _disable_team(team):
|
||
"""封禁团队 — 团队 is_active=False + 全员踢下线。"""
|
||
from apps.accounts.models import ActiveSession
|
||
|
||
team.is_active = False
|
||
team.disabled_by = 'system'
|
||
team.save(update_fields=['is_active', 'disabled_by'])
|
||
ActiveSession.objects.filter(user__team=team).delete()
|
||
logger.info('Team %s disabled by anomaly detection', team.name)
|
||
|
||
|
||
def _is_in_cooldown(team, rule, cooldown_seconds):
|
||
"""检查告警冷却：同团队+同规则在冷却窗口内是否已告警。"""
|
||
from apps.accounts.models import LoginAnomaly
|
||
|
||
since = timezone.now() - timedelta(seconds=cooldown_seconds)
|
||
return LoginAnomaly.objects.filter(
|
||
team=team,
|
||
rule=rule,
|
||
alerted=True,
|
||
created_at__gte=since,
|
||
).exists()
|
||
|
||
|
||
def process_anomalies(login_record, anomalies):
|
||
"""保存异常记录 + 发告警 + 封禁。"""
|
||
from apps.accounts.models import LoginAnomaly
|
||
from apps.generation.models import QuotaConfig
|
||
|
||
if not anomalies:
|
||
return
|
||
|
||
try:
|
||
global_config = QuotaConfig.objects.get(pk=1)
|
||
except QuotaConfig.DoesNotExist:
|
||
return
|
||
|
||
cooldown = global_config.alert_cooldown_seconds
|
||
team = login_record.team
|
||
user = login_record.user
|
||
|
||
for level, rule, detail in anomalies:
|
||
# 确定是否需要封禁
|
||
auto_disabled = False
|
||
disabled_target = ''
|
||
|
||
if rule == 'impossible_travel':
|
||
_disable_user(user)
|
||
auto_disabled = True
|
||
disabled_target = 'user'
|
||
elif rule == 'multi_city':
|
||
_disable_team(team)
|
||
auto_disabled = True
|
||
disabled_target = 'team'
|
||
|
||
# 检查告警冷却
|
||
should_alert = not _is_in_cooldown(team, rule, cooldown)
|
||
|
||
# 保存异常记录
|
||
anomaly = LoginAnomaly.objects.create(
|
||
team=team,
|
||
user=user,
|
||
login_record=login_record,
|
||
level=level,
|
||
rule=rule,
|
||
detail=detail,
|
||
alerted=should_alert,
|
||
auto_disabled=auto_disabled,
|
||
disabled_target=disabled_target,
|
||
)
|
||
|
||
# 异步发送告警（不阻塞登录）
|
||
if should_alert:
|
||
thread = threading.Thread(
|
||
target=_send_alert_safe,
|
||
args=(anomaly.pk,),
|
||
daemon=True,
|
||
)
|
||
thread.start()
|
||
|
||
|
||
def _send_alert_safe(anomaly_pk):
|
||
"""安全地发送告警，捕获所有异常。"""
|
||
try:
|
||
from apps.accounts.models import LoginAnomaly
|
||
anomaly = LoginAnomaly.objects.select_related('team', 'user', 'login_record').get(pk=anomaly_pk)
|
||
|
||
from utils.alert_service import send_feishu_alert
|
||
send_feishu_alert(anomaly)
|
||
except Exception as e:
|
||
logger.error('Failed to send alert for anomaly %s: %s', anomaly_pk, e)
|