https://x7peeps.com/%E5%AE%89%E5%85%A8/%E5%BA%94%E6%80%A5%E5%93%8D%E5%BA%94/0x02%E7%94%B5%E5%AD%90%E5%8F%96%E8%AF%81/4%E7%B3%BB%E7%BB%9F%E4%BF%A1%E6%81%AF%E6%94%B6%E9%9B%86/%E5%BA%94%E6%80%A5%E5%93%8D%E5%BA%94%E5%85%B3%E9%94%AE%E8%AF%81%E6%8D%AE%E6%A3%80%E7%B4%A2%E6%8F%90%E5%8F%96/%E5%BC%82%E5%B8%B8%E7%AB%AF%E5%8F%A3%E6%9F%A5%E8%AF%A2/index.htmlLinux下异常端口/连接检查 netstat 菜鸟 https://www.runoob.com/linux/linux-comm-netstat.html 使用netstat 网络连接命令，分析可疑端口、IP、PID netstat [-acCeFghilMnNoprstuvVwx][-A<网络类型>][--ip] 参数说明： -a或--all 显示所有连线中的Socket。 -A<网络类型>或--<网络类型> 列出该网络类型连线中的相关地址。 -c或--continuous 持续列出网络状态。 -C或--cache 显示路由器配置的快取信息。 -e或--extend 显示网络其他相关信息。 -F或--fib 显示路由缓存。 -g或--groups 显示多重广播功能群组组员名单。 -h或--help 在线帮助。 -i或--interfaces 显示网络界面信息表单。 -l或--listening 显示监控中的服务器的Socket。 -M或--masquerade 显示伪装的网络连线。 -n或--numeric 直接使用IP地址，而不通过域名服务器。 -N或--netlink或--symbolic 显示网络硬件外围设备的符号连接名称。 -o或--timers 显示计时器。 -p或--programs 显示正在使用Socket的程序识别码和程序名称。 -r或--route 显示Routing Table。 -s或--statistics 显示网络工作信息统计表。 -t或--tcp 显示TCP传输协议的连线状况。 -u或--udp 显示UDP传输协议的连线状况。 -v或--verbose 显示指令执行过程。 -V或--version 显示版本信息。 -w或--raw 显示RAW传输协议的连线状况。 -x或--unix 此参数的效果和指定"-A unix"参数相同。 --ip或--inet 此参数的效果和指定"-A inet"参数相同 常用查询语句 netstat -antlp|more 监听使用IP显示所有tcp，显示正在使用socket的程序识别码和程序 netstat -nu 显示当前户籍UDP连接状况 netstat -apu 显示UDP端口号的使用情况 netstat -i 显示网卡列表 netstat -g 显示组播组的关系 netstat -s 显示网络统计信息 netstat -l 显示监听的套接口 parallels@parallels-Parallels-Virtual-Platform:~$ netstat -antlp (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN - tcp6 0 0 ::1:631 :::* LISTEN - parallels@parallels-Parallels-Virtual-Platform:~$ netstat -nu Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State udp 0 0 10.211.55.14:40391 10.211.55.1:53 ESTABLISHED udp 0 0 10.211.55.14:68 10.211.55.1:67 ESTABLISHED udp 0 0 10.211.55.14:41864 10.211.55.1:53 ESTABLISHED parallels@parallels-Parallels-Virtual-Platform:~$ netstat -apu (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name udp 0 0 0.0.0.0:34725 0.0.0.0:* - udp 0 0 localhost:domain 0.0.0.0:* - udp 0 0 10.211.55.14:bootpc 10.211.55.1:bootps ESTABLISHED - udp 0 0 0.0.0.0:631 0.0.0.0:* - udp 0 0 0.0.0.0:mdns 0.0.0.0:* - udp 0 0 10.211.55.14:41864 10.211.55.1:domain ESTABLISHED - udp 0 0 0.0.0.0:mdns 0.0.0.0:* - udp6 0 0 [::]:54263 [::]:* - udp6 0 0 [::]:mdns [::]:* - parallels@parallels-Parallels-Virtual-Platform:~$ netstat -i Kernel Interface table Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg enp0s5 1500 517 0 0 0 510 0 0 0 BMRU lo 65536 234 0 0 0 234 0 0 0 LRU parallels@parallels-Parallels-Virtual-Platform:~$ netstat -s Ip: Forwarding: 2 830 total packets received 1 with invalid addresses 0 forwarded 0 incoming packets discarded 827 incoming packets delivered 778 requests sent out 20 outgoing packets dropped Icmp: 42 ICMP messages received 0 input ICMP message failed ICMP input histogram: destination unreachable: 42 42 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 42 IcmpMsg: InType3: 42 OutType3: 42 Tcp: 22 active connection openings 0 passive connection openings 4 failed connection attempts 2 connection resets received 0 connections established 387 segments received 284 segments sent out 2 segments retransmitted 0 bad segments received 18 resets sent Udp: 345 packets received 42 packets to unknown port received 0 packet receive errors 450 packets sent 0 receive buffer errors 0 send buffer errors IgnoredMulti: 15 UdpLite: TcpExt: 3 TCP sockets finished time wait in fast timer 6 delayed acks sent 185 packet headers predicted 28 acknowledgments not containing data payload received 27 predicted acknowledgments TCPLostRetransmit: 1 TCPTimeouts: 2 2 connections reset due to early user close TCPRcvCoalesce: 16 TCPAutoCorking: 6 TCPSynRetrans: 2 TCPOrigDataSent: 56 TCPDelivered: 70 IpExt: InMcastPkts: 76 OutMcastPkts: 77 InBcastPkts: 15 OutBcastPkts: 15 InOctets: 431065 OutOctets: 65974 InMcastOctets: 9435 OutMcastOctets: 9124 InBcastOctets: 1059 OutBcastOctets: 1059 InNoECTPkts: 830 parallels@parallels-Parallels-Virtual-Platform:~$ netstat -l Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost:domain 0.0.0.0:* LISTEN tcp 0 0 localhost:ipp 0.0.0.0:* LISTEN tcp6 0 0 ip6-localhost:ipp [::]:* LISTEN udp 0 0 0.0.0.0:34725 0.0.0.0:* udp 0 0 localhost:domain 0.0.0.0:* udp 0 0 0.0.0.0:631 0.0.0.0:* udp 0 0 0.0.0.0:mdns 0.0.0.0:* udp6 0 0 [::]:54263 [::]:* udp6 0 0 [::]:mdns [::]:* raw6 0 0 [::]:ipv6-icmp [::]:* 7 Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 40982 @/tmp/.ICE-unix/2258 unix 2 [ ACC ] STREAM LISTENING 37764 /tmp/.X11-unix/X0 unix 2 [ ACC ] SEQPACKET LISTENING 17436 /run/udev/control unix 2 [ ACC ] STREAM LISTENING 40312 @/tmp/dbus-2137JWwNxO unix 2 [ ACC ] STREAM LISTENING 37405 /run/user/1000/systemd/private unix 2 [ ACC ] STREAM LISTENING 37410 /run/user/1000/bus unix 2 [ ACC ] STREAM LISTENING 37411 /run/user/1000/gnupg/S.dirmngr unix 2 [ ACC ] STREAM LISTENING 37412 /run/user/1000/gnupg/S.gpg-agent.browser unix 2 [ ACC ] STREAM LISTENING 37414 /run/user/1000/gnupg/S.gpg-agent.extra unix 2 [ ACC ] STREAM LISTENING 37417 /run/user/1000/gnupg/S.gpg-agent.ssh unix 2 [ ACC ] STREAM LISTENING 37418 /run/user/1000/gnupg/S.gpg-agent unix 2 [ ACC ] STREAM LISTENING 37419 /run/user/1000/pk-debconf-socket unix 2 [ ACC ] STREAM LISTENING 37420 /run/user/1000/pulse/native unix 2 [ ACC ] STREAM LISTENING 37421 /run/user/1000/snapd-session-agent.socket unix 2 [ ACC ] STREAM LISTENING 38336 @/tmp/dbus-KNmuvSF3 unix 2 [ ACC ] STREAM LISTENING 37763 @/tmp/.X11-unix/X0 unix 2 [ ACC ] STREAM LISTENING 37499 /run/user/1000/keyring/control unix 2 [ ACC ] STREAM LISTENING 17409 /run/systemd/private unix 2 [ ACC ] STREAM LISTENING 17411 /run/systemd/userdb/io.systemd.DynamicUser unix 2 [ ACC ] STREAM LISTENING 40983 /tmp/.ICE-unix/2258 unix 2 [ ACC ] STREAM LISTENING 40670 /run/user/1000/keyring/pkcs11 unix 2 [ ACC ] STREAM LISTENING 17422 /run/systemd/fsck.progress unix 2 [ ACC ] STREAM LISTENING 41158 /run/user/1000/keyring/ssh unix 2 [ ACC ] STREAM LISTENING 17432 /run/systemd/journal/stdout unix 2 [ ACC ] STREAM LISTENING 27294 @/tmp/dbus-WiVk8ram unix 2 [ ACC ] STREAM LISTENING 17736 /run/systemd/journal/io.systemd.journal unix 2 [ ACC ] STREAM LISTENING 60034 @/dbus-vfs-daemon/socket-EGz2dAav unix 2 [ ACC ] STREAM LISTENING 38337 @/tmp/dbus-yLYVgUSd unix 2 [ ACC ] STREAM LISTENING 39169 /tmp/ssh-KbaAYvIXQiZa/agent.2103 unix 2 [ ACC ] STREAM LISTENING 44273 @parallels-sga-socket@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ unix 2 [ ACC ] STREAM LISTENING 22541 /run/acpid.socket unix 2 [ ACC ] STREAM LISTENING 22543 /run/avahi-daemon/socket unix 2 [ ACC ] STREAM LISTENING 22545 /run/cups/cups.sock unix 2 [ ACC ] STREAM LISTENING 22547 /run/dbus/system_bus_socket unix 2 [ ACC ] STREAM LISTENING 22549 /run/snapd.socket unix 2 [ ACC ] STREAM LISTENING 22551 /run/snapd-snap.socket unix 2 [ ACC ] STREAM LISTENING 22554 /run/uuidd/request unix 2 [ ACC ] STREAM LISTENING 22406 /run/irqbalance//irqbalance652.sock unix 2 [ ACC ] STREAM LISTENING 27293 @/tmp/dbus-Cpdg820d unix 2 [ ACC ] STREAM LISTENING 40135 @/home/parallels/.cache/ibus/dbus-SaqnFuHN windows下异常端口/连接检查 netstat 官方 https://docs.microsoft.com/zh-cn/windows-server/administration/windows-commands/netstatHugozh-CN