tobimarsh43

I am learning mqtt,mosquitto and test on my localhost is work well. And then,i rent a linux centos 8 machine and install mosquitto, i try to publish a message to that linux broker from my local windows ip. But it always show TimeoutError: [WinError 10060],I have google but still don't know where is the problem? I have tried to publish from my windows local ip to test.mosquitto.org and subscribe from linux,it's work!! I have no idea. publish: local broker .\mosquitto_pub -h 192.168.168.100 -p 1883 -t test -m 'hi' # mosquitto test server .\mosquitto_pub -h test.mosquitto.org -p 1883 -t test -m 'hi' subscribe hi but,when i change the ip address to IDC Linux ip,it alway show show TimeoutError: [WinError 10060] local publish to IDC linux .\mosquitto_pub -h 192.168.168.100 -p 1883 -t test -m 'hi' TimeoutError: [WinError 10060] use python paho to publish,the same error import paho.mqtt.client as mqtt import random import json import datetime import time ''' ISOTIMEFORMAT = '%m/%d %H:%M:%S' client = mqtt.Client() client.connect("192.168.168.100", 1883, 60) while True: t0 = random.randint(0, 30) t1 = random.randint(30, 40) t = datetime.datetime.now().strftime(ISOTIMEFORMAT) topic1 = {'Temperature': t0, 'Time': t} topic2 = {'Temperature': t1, 'Time': t} print(json.dumps(topic1)) print(json.dumps(topic2)) client.publish("test", json.dumps(topic1)) client.publish("mytopic_2", json.dumps(topic2)) time.sleep(5) update,maybe is's error user@Ubuntu:~$ mosquitto -v 1601989020: mosquitto version 1.6.12 starting 1601989020: Using default config. 1601989020: Opening ipv4 listen socket on port 1883. 1601989020: Error: Address already in use ___________________________________ Trainer for https://bit.ly/3nfYiu3