端口测试

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常用的端口测试工具

telnet

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telnet ip port

curl

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# 通
[root@hexo source]# curl 43.133.164.41:7788
curl: (52) Empty reply from server

# 不通
[root@hexo source]# curl 43.133.164.41:22
curl: (28) Failed to connect to 43.133.164.41 port 22: Connection timed out

wget

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# 不通
[root@hexo source]# wget 43.133.164.41:22
--2025-02-14 15:41:01--  http://43.133.164.41:22/
Connecting to 43.133.164.41:22... 
failed: Connection timed out.
Retrying.

--2025-02-14 15:43:14--  (try: 2)  http://43.133.164.41:22/
Connecting to 43.133.164.41:22... 

# 通
[root@hexo source]# wget 43.133.164.41:7788
--2025-02-14 15:44:53--  http://43.133.164.41:7788/
Connecting to 43.133.164.41:7788... connected.
HTTP request sent, awaiting response... No data received.
Retrying.

--2025-02-14 15:44:54--  (try: 2)  http://43.133.164.41:7788/
Connecting to 43.133.164.41:7788... connected.
HTTP request sent, awaiting response... No data received.
Retrying.

ssh

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# 不通
[root@hexo source]# ssh -v -p 22 43.133.164.41
OpenSSH_8.7p1, OpenSSL 3.0.7 1 Nov 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: configuration requests final Match pass
debug1: re-parsing configuration
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: Connecting to 43.133.164.41 [43.133.164.41] port 22.
debug1: connect to address 43.133.164.41 port 22: Connection timed out
ssh: connect to host 43.133.164.41 port 22: Connection timed out

# 通
[root@hexo source]# ssh -v -p 7788 43.133.164.41
OpenSSH_8.7p1, OpenSSL 3.0.7 1 Nov 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: configuration requests final Match pass
debug1: re-parsing configuration
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: Connecting to 43.133.164.41 [43.133.164.41] port 7788.
debug1: Connection established.     # 已连接
debug1: identity file /root/.ssh/id_rsa type 0
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa_sk type -1
debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: identity file /root/.ssh/id_ed25519_sk type -1
debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /root/.ssh/id_xmss type -1
debug1: identity file /root/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.7
kex_exchange_identification: Connection closed by remote host
Connection closed by 43.133.164.41 port 7788