常见的端口
| 端口 | 类型 | 用途 |
|---|---|---|
| 20 | TCP | ftp 数据连接 |
| 21 | TCP | ftp控制连接 |
| 22 | TCP/UDP | Secure shell (SSH) 服务 |
| 23 | TCP | Telnet 服务 |
| 25 | TCP | Simple Mail Transfer Protocol(SMTP,简单邮件传输协议) |
| 42 | TCP/UDP | Windows Internet Name Service( WINS Windows 网络名称服务) |
| 53 | TCP/UDP | Domain Name System 域名系统 |
| 67 | UDP | DHCP 服务 |
| 68 | UDP | DHCP客户端 |
| 69 | UDP | Trivial File Transfer Protocol (TFTP 普通文件传输协议 |
| 80 | TCP/UDP | Hypertext transfer protocol Http |
| 110 | TCP | post pffoce protocol (pop3 邮局协议版本3 |
| 119 | TCP | network news transfer protocol (NNTP 网络新闻传输协议 |
| 123 | UDP | network time protocol (NTP 网络时间协议 |
| 135 | TCP/UDP | Microsoft RPC |
| 137 | TCP/UDP | NetBIOS Name Service (NetBIOS 名称服务 |
| 138 | TCP/UDP | NetBIOS Datagram Service( NetBIOS 数据流服务 |
| 139 | TCP/UDP | NetBIOS Session Service(NetBIOS 会话服务 |
| 143 | TCP/UDP | Internet Message Access Protocol (IMAP Internet 邮件访问协议 |
| 161 | TCP/UDP | Simple Network Management Protocol(SNMP 简单网络管理协议 |
| 162 | TCP/UDP | Simple Network Management Protocol Trap (SNMAP 陷阱 |
| 389 | TCP/UDP | Lightweight Directory Access Protocol (LDAP, 轻量目录访问协议 |
| 443 | TCP/UDP | Hypertext Transfer Protocol over TLS/SSL HTTPS |
| 445 | TCP | Server MEssage Block (SMB,服务信息块 |
| 636 | TCP/UDP | Lightweight Directory Access Protocol over TLS/SSL (LDAPS) |
| 873 | TCP | Remote File Synchronization Protocol 远程文件同步协议 |
| 993 | TCP | Internet Message Access Protocol over SSL (IMAPS |
| 995 | TCP | Post office Protocol 3 over TLS/SSL (POP3S) |
| 1433 | TCP | Microsoft SQL Server Database |
| 3306 | TCP | Mysql服务 |
| 3389 | TCP | Microsoft Terminal Server/Romote Desktop Protocol (RDP) |
| 5800 | TCP | Virtual Network Computing web interface 虚拟网络计算机web界面 |
| 5900 | TCP | Virtual Network Computing remote desktop VNC,虚拟网络计算机远程桌面 |
TTL 值
| 操作系统 | TTL值 |
|---|---|
| UNIX及类UNIX 操作系统 | 255 |
| Compaq Tru64 5.0 | 64 |
| Windows XP-32bit | 128 |
| Linux Kernel 2.2.x& 2.4.x | 64 |
| FreeBSD 4.1,4.0,3.4, Sun Solaris 2.5.1,2.6,2.7,2.8, OpenBSD 2.6,2.7/NetBSD,HP UX 10.20 | 255 |
| windows 95/98/98SE , Windows ME | 32 |
| Windows NT4 WRKS ,Windows NT 4 Server , Windows 2000,Windows XP/7/8/10 | 128 |
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