Linux测试端口的连通性的5种方法

wacpguo 2024-07-21 13:07:05 阅读 88

1、curl

（1）curl -v ip:port

<code>[root@localhost ~]# curl -v 192.168.120.15:37777

* About to connect() to 192.168.120.15 port 37777 (#0)

* Trying 192.168.120.15...

* Connected to 192.168.120.15 (192.168.120.15) port 37777 (#0)

> GET / HTTP/1.1

> User-Agent: curl/7.29.0

> Host: 192.168.120.15:37777

> Accept: */*

>

（2）curl -kv https://ip:port

[root@localhost ~]# curl -kv https://192.168.12.15:3789

* About to connect() to 192.168.12.15 port 3789 (#0)

* Trying 192.168.12.15...

* Connected to 192.168.12.15 (192.168.12.15) port 3789 (#0)

* Initializing NSS with certpath: sql:/etc/pki/nssdb

* skipping SSL peer certificate verification

* SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

* Server certificate:

* subject: CN=cn.com.ca.d6.agent

* start date: 4月 26 03:51:05 2021 GMT

* expire date: 4月 26 03:51:05 2041 GMT

* common name: cn.com.ca.d6.agent

* issuer: CN=cn.com.ca.d6.agent

> GET / HTTP/1.1

> User-Agent: curl/7.29.0

> Host: 192.168.12.15:3789

> Accept: */*

>

< HTTP/1.1 404

< Connection:close

< Content-Length:22

< Content-Type:text/html

< X-Frame-Options:sameorigin

<

* Closing connection 0

<html>not found</html>

2、nc

（1）nc -nv ip port

[root@localhost ~]# nc -nv 192.168.12.15 3789

Ncat: Version 7.50 ( https://nmap.org/ncat )

Ncat: Connected to 192.168.12.15:3789.

^C

（2）nc -nvv ip port

[root@localhost ~]# nc -nvv 192.168.12.15 3789

Ncat: Version 7.50 ( https://nmap.org/ncat )

NCAT DEBUG: Using system default trusted CA certificates and those in /usr/share/ncat/ca-bundle.crt.

NCAT DEBUG: Unable to load trusted CA certificates from /usr/share/ncat/ca-bundle.crt: error:02001002:system library:fopen:No such file or directory

libnsock nsi_new2(): nsi_new (IOD #1)

libnsock nsock_connect_tcp(): TCP connection requested to 192.168.12.15:3789 (IOD #1) EID 8

libnsock nsock_trace_handler_callback(): Callback: CONNECT SUCCESS for EID 8 [192.168.12.15:3789]

Ncat: Connected to 192.168.12.15:3789.

libnsock nsi_new2(): nsi_new (IOD #2)

libnsock nsock_read(): Read request from IOD #1 [192.168.12.15:3789] (timeout: -1ms) EID 18

libnsock nsock_readbytes(): Read request for 0 bytes from IOD #2 [peer unspecified] EID 26

^C

3、ssh

（1）ssh -v -p port username@ip // username任意

[root@localhost ~]# ssh -v -p 3789 root@192.168.12.15

OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 58: Applying options for *

debug1: Connecting to 192.168.120.15 [192.168.12.15] port 3789.

debug1: Connection established.

debug1: permanently_set_uid: 0/0

debug1: identity file /root/.ssh/id_rsa type 1