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82.6. 監控網絡

列出所有的網絡連接

[root@netkiller neo]# lsof -i
COMMAND     PID          USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
php-fpm    2274           www    0u  IPv4  96056019      0t0  TCP localhost:cslistener (LISTEN)
php-fpm    2274           www    4u  IPv4 688391009      0t0  TCP localhost:43483->localhost:27017 (ESTABLISHED)
python3    4384        zabbix    6u  IPv4 688769849      0t0  TCP iZ623qr3xctZ:zabbix-agent->10.26.6.18:50666 (ESTABLISHED)
python3    4385        zabbix    6u  IPv4 688769848      0t0  TCP iZ623qr3xctZ:zabbix-agent->10.26.6.18:50668 (ESTABLISHED)
redis-ser  5170         redis    4u  IPv4   5690059      0t0  TCP localhost:6379 (LISTEN)
php-fpm    8277           www    0u  IPv4  96056019      0t0  TCP localhost:cslistener (LISTEN)
php-fpm    8277           www    4u  IPv4 688149893      0t0  TCP localhost:60933->localhost:27017 (ESTABLISHED)
php-fpm    8543           www    0u  IPv4  96056019      0t0  TCP localhost:cslistener (LISTEN)
beam.smp   9703      rabbitmq    8u  IPv4 626401894      0t0  TCP *:25672 (LISTEN)
beam.smp   9703      rabbitmq    9u  IPv4 626401896      0t0  TCP localhost:42821->localhost:epmd (ESTABLISHED)
beam.smp   9703      rabbitmq   17u  IPv6 626403609      0t0  TCP *:amqp (LISTEN)
beam.smp   9703      rabbitmq   18u  IPv4 626402643      0t0  TCP *:15672 (LISTEN)
beam.smp   9703      rabbitmq   20u  IPv6 685257290      0t0  TCP localhost:amqp->localhost:57692 (ESTABLISHED)
sshd      11227          root    3u  IPv4 626404210      0t0  TCP *:ssh (LISTEN)
ntpd      11646           ntp   16u  IPv4 626409506      0t0  UDP *:ntp 
ntpd      11646           ntp   17u  IPv6 626406239      0t0  UDP *:ntp 
ntpd      11646           ntp   18u  IPv4 626406244      0t0  UDP localhost:ntp 
ntpd      11646           ntp   19u  IPv4 626406245      0t0  UDP iZ623qr3xctZ:ntp 
ntpd      11646           ntp   20u  IPv4 626406246      0t0  UDP iZ623qr3xctZ:ntp 


5 列出所有的網絡連接/連接埠


[root@netkiller ~]# lsof -i 
COMMAND     PID   USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
portreser  1698   root    5u  IPv4    10656      0t0  UDP *:ldaps 
snmpd      1993   root    7u  IPv4    12071      0t0  UDP *:snmp 
snmpd      1993   root    9u  IPv4    12073      0t0  TCP localhost:smux (LISTEN)
sshd       2005   root    3u  IPv4    12109      0t0  TCP *:ssh (LISTEN)
	
			

什麼程序運行在22連接埠上

lsof -i :22
			

誰在聯繫連接埠

# lsof -i -a -c ssh
COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
sshd    2843 root    3r  IPv4  27960      0t0  TCP 192.168.6.9:ssh->192.168.6.30:55363 (ESTABLISHED)
sshd    3003 root    3u  IPv4  28864      0t0  TCP *:ssh (LISTEN)
sshd    3003 root    4u  IPv6  28866      0t0  TCP *:ssh (LISTEN)
			

$ lsof -i -a -c nginx
COMMAND   PID USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
nginx   26222  www    8w  IPv4 557827648      0t0  TCP 42.121.14.230:http->110.240.206.67:63482 (ESTABLISHED)
nginx   26222  www    9u  IPv4 557817283      0t0  TCP 42.121.14.230:http->27.106.154.202:18972 (ESTABLISHED)
nginx   26222  www   10u  IPv4 496452301      0t0  TCP *:http (LISTEN)
nginx   26222  www   17u  IPv4 557826020      0t0  TCP 42.121.14.230:http->210.177.78.33:62297 (ESTABLISHED)
nginx   26222  www   18u  IPv4 557827745      0t0  TCP 42.121.14.230:http->115.214.39.230:50628 (ESTABLISHED)
nginx   26222  www   19u  IPv4 557826475      0t0  TCP 42.121.14.230:http->183.160.124.225:57143 (ESTABLISHED)
nginx   26222  www   20u  IPv4 557827670      0t0  TCP 42.121.14.230:http->125.88.77.30:8956 (ESTABLISHED)
nginx   26222  www   21u  IPv4 557826122      0t0  TCP 42.121.14.230:http->116.24.229.173:rfid-rp1 (ESTABLISHED)
nginx   26222  www   22u  IPv4 557826127      0t0  TCP 42.121.14.230:http->119.137.141.76:21508 (ESTABLISHED)
nginx   26222  www   23u  IPv4 557826476      0t0  TCP 42.121.14.230:http->183.160.124.225:57144 (ESTABLISHED)
nginx   26222  www   24u  IPv4 557821930      0t0  TCP 42.121.14.230:http->210.21.127.136:52309 (ESTABLISHED)
nginx   26222  www   25u  IPv4 557826477      0t0  TCP 42.121.14.230:http->183.160.124.225:57145 (ESTABLISHED)
nginx   26222  www   26u  IPv4 557827693      0t0  TCP 42.121.14.230:http->111.227.215.135:18628 (ESTABLISHED)
			

通過進程ID監控網絡連接

$ lsof -i -a -p 26222
COMMAND   PID USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
nginx   26222  www    8w  IPv4 557827648      0t0  TCP 42.121.14.230:http->110.240.206.67:63482 (ESTABLISHED)
nginx   26222  www    9u  IPv4 557817283      0t0  TCP 42.121.14.230:http->27.106.154.202:18972 (ESTABLISHED)
nginx   26222  www   10u  IPv4 496452301      0t0  TCP *:http (LISTEN)
nginx   26222  www   21u  IPv4 557826122      0t0  TCP 42.121.14.230:http->116.24.229.173:rfid-rp1 (ESTABLISHED)
nginx   26222  www   26u  IPv4 557827693      0t0  TCP 42.121.14.230:http->111.227.215.135:18628 (ESTABLISHED)
nginx   26222  www   31u  IPv4 557798349      0t0  TCP 42.121.14.230:http->213.92.156.27.broad.fz.fj.dynamic.163data.com.cn:novation (ESTABLISHED)
nginx   26222  www   33u  IPv4 557807306      0t0  TCP 42.121.14.230:http->182.139.49.102:news (ESTABLISHED)
nginx   26222  www   38u  IPv4 557825270      0t0  TCP 42.121.14.230:http->122.71.50.188:43694 (ESTABLISHED)
nginx   26222  www   40u  IPv4 557817907      0t0  TCP 42.121.14.230:http->120.28.127.54:62009 (ESTABLISHED)
nginx   26222  www   41u  IPv4 557800691      0t0  TCP 42.121.14.230:http->27.190.185.75:60475 (ESTABLISHED)
			

UDP 監控

# lsof -i udp;
COMMAND    PID     USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
rpcbind   2431      rpc    6u  IPv4    12483      0t0  UDP *:sunrpc
rpcbind   2431      rpc    7u  IPv4    12487      0t0  UDP *:kink
rpcbind   2431      rpc    9u  IPv6    12490      0t0  UDP *:sunrpc
rpcbind   2431      rpc   10u  IPv6    12492      0t0  UDP *:kink
avahi-dae 2549    avahi   13u  IPv4    12781      0t0  UDP *:mdns
avahi-dae 2549    avahi   14u  IPv4    12782      0t0  UDP *:45747
rpc.statd 2570  rpcuser    5u  IPv4    13011      0t0  UDP *:asia
rpc.statd 2570  rpcuser    8u  IPv4    13015      0t0  UDP *:55218
rpc.statd 2570  rpcuser   10u  IPv6    13023      0t0  UDP *:51236
openvpn   2594   nobody    5u  IPv4    13060      0t0  UDP *:openvpn
cupsd     2661     root    9u  IPv4    13379      0t0  UDP *:ipp
ntpd      2832      ntp   16u  IPv4    14050      0t0  UDP *:ntp
ntpd      2832      ntp   17u  IPv6    14051      0t0  UDP *:ntp
ntpd      2832      ntp   18u  IPv6    14055      0t0  UDP localhost:ntp
ntpd      2832      ntp   19u  IPv6    14056      0t0  UDP [fe80::225:90ff:fe35:906c]:ntp
ntpd      2832      ntp   20u  IPv4    14057      0t0  UDP localhost:ntp
ntpd      2832      ntp   21u  IPv4    14058      0t0  UDP manager.repo:ntp
ntpd      2832      ntp   22u  IPv4    14059      0t0  UDP 10.8.0.1:ntp
ntpd      2832      ntp   24u  IPv4    15922      0t0  UDP 192.168.122.1:ntp
ntpd      2832      ntp   25u  IPv6    27224      0t0  UDP [fe80::fc54:ff:fe94:b3c2]:ntp
ntpd      2832      ntp   26u  IPv6    27225      0t0  UDP [fe80::fc54:ff:fe54:c9d2]:ntp
ntpd      2832      ntp   27u  IPv6    27948      0t0  UDP [fe80::fc54:ff:fe4e:a846]:ntp
ntpd      2832      ntp   28u  IPv6    28197      0t0  UDP [fe80::fc54:ff:fe19:c00e]:ntp
ntpd      2832      ntp   29u  IPv6 99178415      0t0  UDP [fe80::fc54:ff:fe5a:ace]:ntp
ntpd      2832      ntp   30u  IPv6 99179648      0t0  UDP [fe80::fc54:ff:fe68:54a0]:ntp
ntpd      2832      ntp   31u  IPv6 99180801      0t0  UDP [fe80::fc54:ff:fed6:3593]:ntp
postmaste 3391 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
postmaste 3395 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
postmaste 3396 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
postmaste 3397 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
postmaste 3398 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
postmaste 3399 postgres    9u  IPv6    15004      0t0  UDP localhost:56631->localhost:56631
dnsmasq   3647   nobody    5u  IPv4    15671      0t0  UDP *:bootps
dnsmasq   3647   nobody    7u  IPv4    15680      0t0  UDP 192.168.122.1:domain
			

TCP 監控

lsof -i tcp;
			

特定的tcp/udp連接埠, 監控 udp 連接埠 123

[root@netkiller neo]# lsof -i udp:123
COMMAND   PID USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
ntpd    11646  ntp   16u  IPv4 626409506      0t0  UDP *:ntp 
ntpd    11646  ntp   17u  IPv6 626406239      0t0  UDP *:ntp 
ntpd    11646  ntp   18u  IPv4 626406244      0t0  UDP localhost:ntp 
ntpd    11646  ntp   19u  IPv4 626406245      0t0  UDP iZ623qr3xctZ:ntp 
ntpd    11646  ntp   20u  IPv4 626406246      0t0  UDP iZ623qr3xctZ:ntp 		

檢測某個連接埠所占用的進程,如22連接埠
[root@netkiller ~]# lsof -i :22

[root@netkiller ~]# lsof -i udp:53	
			

列出所有tcp/UDP 網絡連接信息

[root@netkiller ~]# lsof -i tcp/udp			
			

列出nginx用戶活躍的連結

[root@netkiller neo]# lsof  -a -u nginx -i
COMMAND   PID  USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
nginx   20536 nginx   19u  IPv4 686393040      0t0  TCP *:http (LISTEN)
nginx   20536 nginx   20u  IPv4 686393041      0t0  TCP *:https (LISTEN)
nginx   20536 nginx   42u  IPv4 688774445      0t0  TCP iZ623qr3xctZ:http->112.224.19.79:32751 (ESTABLISHED)
nginx   20536 nginx   49u  IPv4 688774400      0t0  TCP iZ623qr3xctZ:http->117.156.4.113:58212 (ESTABLISHED)
nginx   20536 nginx   52u  IPv4 688774494      0t0  TCP iZ623qr3xctZ:http->112.224.19.79:32753 (ESTABLISHED)
nginx   20536 nginx   53u  IPv4 688774495      0t0  TCP iZ623qr3xctZ:http->112.224.19.79:32752 (ESTABLISHED)
nginx   20536 nginx   54u  IPv4 688774555      0t0  TCP iZ623qr3xctZ:http->113.128.232.89:37529 (ESTABLISHED)
nginx   20536 nginx   55u  IPv4 688774497      0t0  TCP iZ623qr3xctZ:http->112.224.19.79:32754 (ESTABLISHED)
nginx   20536 nginx   56u  IPv4 688774556      0t0  TCP iZ623qr3xctZ:http->113.128.232.89:37530 (ESTABLISHED)
nginx   20536 nginx   58u  IPv4 688774500      0t0  TCP iZ623qr3xctZ:http->112.224.19.79:32755 (ESTABLISHED)
nginx   20536 nginx   60u  IPv4 688778242      0t0  TCP iZ623qr3xctZ:http->113.128.232.89:37532 (ESTABLISHED)
nginx   20536 nginx   61u  IPv4 688774559      0t0  TCP iZ623qr3xctZ:http->113.128.232.89:37528 (ESTABLISHED)
nginx   20536 nginx   64u  IPv4 688774562      0t0  TCP iZ623qr3xctZ:http->113.128.232.89:37531 (ESTABLISHED)
nginx   20537 nginx   19u  IPv4 686393040      0t0  TCP *:http (LISTEN)
nginx   20537 nginx   20u  IPv4 686393041      0t0  TCP *:https (LISTEN)
nginx   20538 nginx   19u  IPv4 686393040      0t0  TCP *:http (LISTEN)
nginx   20538 nginx   20u  IPv4 686393041      0t0  TCP *:https (LISTEN)
nginx   20539 nginx   18u  IPv4 688777804      0t0  TCP iZ623qr3xctZ:http->39.187.213.246:49624 (ESTABLISHED)
nginx   20539 nginx   19u  IPv4 686393040      0t0  TCP *:http (LISTEN)
nginx   20539 nginx   20u  IPv4 686393041      0t0  TCP *:https (LISTEN)