Mosquitto responds on Ubuntu on HP Microserver, not on PCDuino











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I have a HP Microserver running Ubuntu LTS 18.04, and I use it as a MQTT broker. I port forward port 1883 from my internet router to 172.16.97.2 - the address of my Microserver.



I want to run it on a less intensive device, so I installed a PCDuino, which is also running Ubuntu - Linaro 12.07. It's IP address is 172.16.97.9



The MQTT Broker responds when I do mosquitto_pub from LAN devices on the same segment on both the HP Microserver and the PCduino.



However....



The PCDuino does not respond to external requests after I change the port forwarding address.



I have had trouble trying to change the IP address of eth0 also - I tried the gui "Edit Connections" but it does not have any effect - by that I mean I set eth0 to be a static IP, in Edit Connections, and the device maintains it's dhcp ip address even after a shutdown -r now.



Is there any obvioud places I should look to fix this networking issue?



However, when I change the port






networking ethernet







share|improve this question






















  • Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
    – kukulo
    Nov 25 at 7:01












  • The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
    – NULLpointer
    Nov 25 at 20:27










  • on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
    – NULLpointer
    Nov 25 at 20:41










  • Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
    – kukulo
    Nov 26 at 6:52















up vote
0
down vote

favorite












I have a HP Microserver running Ubuntu LTS 18.04, and I use it as a MQTT broker. I port forward port 1883 from my internet router to 172.16.97.2 - the address of my Microserver.



I want to run it on a less intensive device, so I installed a PCDuino, which is also running Ubuntu - Linaro 12.07. It's IP address is 172.16.97.9



The MQTT Broker responds when I do mosquitto_pub from LAN devices on the same segment on both the HP Microserver and the PCduino.



However....



The PCDuino does not respond to external requests after I change the port forwarding address.



I have had trouble trying to change the IP address of eth0 also - I tried the gui "Edit Connections" but it does not have any effect - by that I mean I set eth0 to be a static IP, in Edit Connections, and the device maintains it's dhcp ip address even after a shutdown -r now.



Is there any obvioud places I should look to fix this networking issue?



However, when I change the port






networking ethernet







share|improve this question






















  • Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
    – kukulo
    Nov 25 at 7:01












  • The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
    – NULLpointer
    Nov 25 at 20:27










  • on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
    – NULLpointer
    Nov 25 at 20:41










  • Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
    – kukulo
    Nov 26 at 6:52













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have a HP Microserver running Ubuntu LTS 18.04, and I use it as a MQTT broker. I port forward port 1883 from my internet router to 172.16.97.2 - the address of my Microserver.



I want to run it on a less intensive device, so I installed a PCDuino, which is also running Ubuntu - Linaro 12.07. It's IP address is 172.16.97.9



The MQTT Broker responds when I do mosquitto_pub from LAN devices on the same segment on both the HP Microserver and the PCduino.



However....



The PCDuino does not respond to external requests after I change the port forwarding address.



I have had trouble trying to change the IP address of eth0 also - I tried the gui "Edit Connections" but it does not have any effect - by that I mean I set eth0 to be a static IP, in Edit Connections, and the device maintains it's dhcp ip address even after a shutdown -r now.



Is there any obvioud places I should look to fix this networking issue?



However, when I change the port






networking ethernet







share|improve this question













I have a HP Microserver running Ubuntu LTS 18.04, and I use it as a MQTT broker. I port forward port 1883 from my internet router to 172.16.97.2 - the address of my Microserver.



I want to run it on a less intensive device, so I installed a PCDuino, which is also running Ubuntu - Linaro 12.07. It's IP address is 172.16.97.9



The MQTT Broker responds when I do mosquitto_pub from LAN devices on the same segment on both the HP Microserver and the PCduino.



However....



The PCDuino does not respond to external requests after I change the port forwarding address.



I have had trouble trying to change the IP address of eth0 also - I tried the gui "Edit Connections" but it does not have any effect - by that I mean I set eth0 to be a static IP, in Edit Connections, and the device maintains it's dhcp ip address even after a shutdown -r now.



Is there any obvioud places I should look to fix this networking issue?



However, when I change the port






networking ethernet




networking ethernet






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 25 at 6:37









NULLpointer

1




1












  • Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
    – kukulo
    Nov 25 at 7:01












  • The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
    – NULLpointer
    Nov 25 at 20:27










  • on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
    – NULLpointer
    Nov 25 at 20:41










  • Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
    – kukulo
    Nov 26 at 6:52


















  • Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
    – kukulo
    Nov 25 at 7:01












  • The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
    – NULLpointer
    Nov 25 at 20:27










  • on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
    – NULLpointer
    Nov 25 at 20:41










  • Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
    – kukulo
    Nov 26 at 6:52
















Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
– kukulo
Nov 25 at 7:01






Looks like a firewall issue on your PCDuino. What does the nmap say, is the port on PCDuino open?
– kukulo
Nov 25 at 7:01














The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
– NULLpointer
Nov 25 at 20:27




The MQTT Broker on the PCDuino responds to mosquitto_pub from another computer connected to the same ethernet switch on the same segment, so is it more likely to be a newtwork gateway issue?
– NULLpointer
Nov 25 at 20:27












on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
– NULLpointer
Nov 25 at 20:41




on the other machine, nmap -p 1833 172.16.97.9 returns 1883/tcp open unknown
– NULLpointer
Nov 25 at 20:41












Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
– kukulo
Nov 26 at 6:52




Can you swap the two IP adresses? E.g. PCDuino gets 172.16.97.2? Does the MQTT not require UPNP on PCDuino?
– kukulo
Nov 26 at 6:52















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