CentOS 7 firewalld can't open UDP port



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I've CentOS 7 vps and I need to open some TCP and UDP ports.



I use firewalld and I add my ports on it but no port forwarding. I contact the VPS support and the say that the port will be open when it used.



So for port 80, I already installed Nginx and in Nmap it show this port is open. For other TCP ports, I also already install docker and run some container with the port that I want and again the Nmap shows that TCP ports that I needed are now open and fine.



The problem is that I can't get the UDP ports open. I've try to add port to container and they will added fine but Nmap shows that they are closed.



Is there any simple application I can install that used UDP port so I can change it's required port to my needed port so I can open it.



There is no different between iptables and firewalld because they both use the same method.










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  • 1





    This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

    – Wayne Phipps
    Nov 15 '18 at 10:52

















0















I've CentOS 7 vps and I need to open some TCP and UDP ports.



I use firewalld and I add my ports on it but no port forwarding. I contact the VPS support and the say that the port will be open when it used.



So for port 80, I already installed Nginx and in Nmap it show this port is open. For other TCP ports, I also already install docker and run some container with the port that I want and again the Nmap shows that TCP ports that I needed are now open and fine.



The problem is that I can't get the UDP ports open. I've try to add port to container and they will added fine but Nmap shows that they are closed.



Is there any simple application I can install that used UDP port so I can change it's required port to my needed port so I can open it.



There is no different between iptables and firewalld because they both use the same method.










share|improve this question



















  • 1





    This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

    – Wayne Phipps
    Nov 15 '18 at 10:52













0












0








0








I've CentOS 7 vps and I need to open some TCP and UDP ports.



I use firewalld and I add my ports on it but no port forwarding. I contact the VPS support and the say that the port will be open when it used.



So for port 80, I already installed Nginx and in Nmap it show this port is open. For other TCP ports, I also already install docker and run some container with the port that I want and again the Nmap shows that TCP ports that I needed are now open and fine.



The problem is that I can't get the UDP ports open. I've try to add port to container and they will added fine but Nmap shows that they are closed.



Is there any simple application I can install that used UDP port so I can change it's required port to my needed port so I can open it.



There is no different between iptables and firewalld because they both use the same method.










share|improve this question
















I've CentOS 7 vps and I need to open some TCP and UDP ports.



I use firewalld and I add my ports on it but no port forwarding. I contact the VPS support and the say that the port will be open when it used.



So for port 80, I already installed Nginx and in Nmap it show this port is open. For other TCP ports, I also already install docker and run some container with the port that I want and again the Nmap shows that TCP ports that I needed are now open and fine.



The problem is that I can't get the UDP ports open. I've try to add port to container and they will added fine but Nmap shows that they are closed.



Is there any simple application I can install that used UDP port so I can change it's required port to my needed port so I can open it.



There is no different between iptables and firewalld because they both use the same method.







sockets centos udp






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edited Nov 15 '18 at 11:20









kit

1,10631017




1,10631017










asked Nov 15 '18 at 10:33









feri betbazferi betbaz

1




1







  • 1





    This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

    – Wayne Phipps
    Nov 15 '18 at 10:52












  • 1





    This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

    – Wayne Phipps
    Nov 15 '18 at 10:52







1




1





This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

– Wayne Phipps
Nov 15 '18 at 10:52





This is probably off-topic here as it's not about programming in general, see stackoverflow.com/help/on-topic for reference. You may get more feedback on unix.stackexchange.com

– Wayne Phipps
Nov 15 '18 at 10:52












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