Nexus Shell v1.5.8
新功能
- 全新「监控」页：定时守护服务器的网络质量与 SSH 安全，一处掌握
- 网络质量：在两台服务器之间定时测量带宽（TCP 吞吐）、UDP 丢包与抖动、Ping 延迟与丢包，均双向测量；可设阈值，链路劣化时提醒
- 全天候常驻：在源服务器上定时采样，Mac 关机、休眠期间也不中断，打开 App 自动回填这段时间的数据
- 趋势图：带宽 / 丢包 / 延迟三张趋势图，支持 1 小时 / 24 小时 / 7 天视图，并统计每次测试消耗的流量
- 路径诊断：链路变差时逐跳定位丢包出现在哪一跳 —— 秒级先出完整路径与每跳 ASN，再精确测量；本机无法使用 mtr 时自动降级为系统 traceroute
- SSH 安全监控（只读）：读取服务器的 SSH 认证日志，随时了解这台机器是否正在遭受爆破 —— 失败登录次数、每小时频率、攻击来源 IP、被扫用户名排行、失败趋势图一目了然；不修改服务器任何配置，原始日志绝不离开服务器
- 疑似入侵告警：若某个曾多次登录失败的 IP 最终登录成功（且非密钥登录），立即标记「疑似爆破成功」并通知
- 安全姿态提示：看清 fail2ban 是否在运行、是否开启密码登录、是否允许 root 登录，并结合实际情况给出加固建议
New Features
- A brand-new Monitor page that watches both network quality and SSH security for your servers in one place
- Network quality: schedule tests between two servers — bandwidth (TCP throughput), UDP loss and jitter, ping latency and loss — all measured in both directions, with optional thresholds that alert you when a link degrades
- 24/7 resident monitoring: sample from the source server on a schedule so it keeps running even while your Mac is off or asleep, then backfills automatically when you reopen the app
- Trend charts for bandwidth, loss and latency over 1h / 24h / 7d, plus the data used by each test
- Path diagnosis: when a link degrades, pinpoint which hop is losing packets — the full path and per-hop AS numbers appear within seconds, then precise stats follow; it falls back to the system traceroute when mtr isn't available locally
- SSH security monitoring (read-only): analyze a server's SSH auth log so you always know whether it's under a brute-force attack — failed-login count, per-hour rate, source IPs, most-targeted usernames, and a failure trend chart; it never changes any server configuration and raw log lines never leave the server
- Suspected break-in alerts: if an IP with repeated failures eventually logs in successfully (and not via key), it's flagged as a suspected breach and you're notified
- Security posture: see whether fail2ban is running, whether password login is enabled, and whether root login is allowed — with hardening suggestions tailored to your setup