Visit Our UNIX and Linux User Community


Unable to open firewall port for external traffic.


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Unable to open firewall port for external traffic.
# 1  
Old 12-15-2018
Unable to open firewall port for external traffic.

Below is what i did to open the firewall port on

Code:
[root@vultr ~]# sudo firewall-cmd --zone=public --add-port=27012/tcp --permanent
Warning: ALREADY_ENABLED: 27012:tcp
success
[root@vultr ~]# sudo firewall-cmd --reload
success
[root@vultr ~]# firewall-cmd --list-all
public
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: dhcpv6-client ssh http https
  ports: 80/tcp 27012/tcp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[root@vultr ~]# uname -a
Linux vultr.guest 3.10.0-862.14.4.el7.x86_64 #1 SMP Wed Sep 26 15:12:11 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

When i telnet to the servers IP:Port it fails

Code:
telnet 45.76.142.202 27012
Connecting To 45.76.142.202...Could not open connection to the host, on port 27012: Connect failed

It however does connect to port 80
Code:
telnet 45.76.142.202 80

Can you please help me get firewall port 27012 connect externally just the way port 80 is connecting ?
# 2  
Old 12-15-2018
Maybe post the output of:

Code:
firewall-cmd --list-all-zones

or use a similar command to dump the entire rule set?
# 3  
Old 12-15-2018
Code:
[root@vultr ~]# firewall-cmd --list-all-zones
block
  target: %%REJECT%%
  icmp-block-inversion: no
  interfaces:
  sources:
  services:
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


dmz
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: ssh
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


drop
  target: DROP
  icmp-block-inversion: no
  interfaces:
  sources:
  services:
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


external
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: ssh
  ports:
  protocols:
  masquerade: yes
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


home
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: ssh mdns samba-client dhcpv6-client
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


internal
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: ssh mdns samba-client dhcpv6-client
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


public
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: dhcpv6-client ssh http https
  ports: 27017/tcp 80/tcp 27012/tcp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


trusted
  target: ACCEPT
  icmp-block-inversion: no
  interfaces:
  sources:
  services:
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:


work
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: ssh dhcpv6-client
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

# 4  
Old 12-15-2018
What process is running on port 27012 on your server?
# 5  
Old 12-15-2018
# 6  
Old 12-15-2018
You changed from the default ports, right?

The following table lists the default TCP ports used by MongoDB:

Code:
Default Port	Description
27017	The default port for mongod and mongos instances. You can change this port with port or --port.
27018	The default port for mongod when running with --shardsvr command-line option or the shardsvr value for the clusterRole setting in a configuration file.
27019	The default port for mongod when running with --configsvr command-line option or the configsvr value for the clusterRole setting in a configuration file.

Anyway, if you are running a DB on this port, normally sys admins only bind the DB to localhost or 127.0.0.1 for security reasons.

Do something like netstat -an | grep 27012 and post the output. Thanks.
# 7  
Old 12-15-2018
Per my note above, you need to check to see if your DB is bound to localhost or to your IP address.

If it is bound to localhost (127.0.0.1) you will not be able to telnet to that port using the IP address you were using.

Check your config for:

Code:
bind_ip: 127.0.0.1

This User Gave Thanks to Neo For This Post:

Previous Thread | Next Thread
Test Your Knowledge in Computers #345
Difficulty: Medium
Scott McNealy received $238 million USD when the Oracle acquisition closed.
True or False?

10 More Discussions You Might Find Interesting

1. AIX

How to re-route traffic from one port to another?

Hi Friends, How to do port forwarding in AIX? We would like to re route traffic from port A to port B on AIX LPAR. for example: my application is using 8080 port on LPAR and would like to use the 8081 instead of 8080. By default application was configured with 8080. But instead of changing... (2 Replies)
Discussion started by: System Admin 77
2 Replies

2. Infrastructure Monitoring

How do I know what traffic is in network port?

If I would like to know what connection , data , traffic in a network port ( eth0 ) , what can I do ? ps. because I always found the network is very slow , so I would like what the network port is doing . Thanks Login ID ust3 is currently in read-only mode for multiple infractions. Creating... (0 Replies)
Discussion started by: ust03
0 Replies

3. Red Hat

Unable to Open port 8080

Hi Experts, I am receiving below error while trying to connect port 8080. Could not open connection to the host, on port 8080 : connection refused. iptables configuration /etc/sysconfig/iptables # Firewall configuration written by system-config-firewall # Manual customization of... (1 Reply)
Discussion started by: sai_2507
1 Replies

4. UNIX for Dummies Questions & Answers

Rsync port and firewall

hi guys I doing some collocation for a customer, customer requested to use other port for ssh not the default one. OK no problem and customer will be using rsync to sync backups among other things I know we have to open port let's say port 5999 for ssh since we are using that one now but I... (1 Reply)
Discussion started by: karlochacon
1 Replies

5. UNIX for Advanced & Expert Users

Linux bridged firewall - monitor traffic & block IP

Hi All, I successfully configured a DEBIAN Lenny bridged firewall using ebtables. The bridged interface is br0. The ethernet interface are eth0 & eth1 respectively. All the traffic are transparently passing my firewall but i need to find & block temporarily the bandwidth abusers. Can... (1 Reply)
Discussion started by: coolatt
1 Replies

6. IP Networking

Tcp ip port open but no such process (merged: Release A Port)

i want to kill a tcp connection by killing its pid with netstat -an i got the tcp ip connection on port 5914 but when i type ps -a or ps-e there is not such process running on port 5914 is it possible that because i do not log on with proper user account i can not see that process running? (30 Replies)
Discussion started by: alinamadchian
30 Replies

7. IP Networking

blocking traffic to destination network by port

I am trying to block ALL traffic except when from ports 9100,22,23 to destination network 192.0.0.0 (my WAN): 2 networks 192.0.3.0 with static route to 192.0.0.0 Shouldn't this work?: iptables -A INPUT -p tcp -d 192.0.0.0/24 --dport 22 -j ACCEPT iptables -A INPUT -p tcp -d 192.0.0.0/24... (3 Replies)
Discussion started by: herot
3 Replies

8. Solaris

Unable to open 3966 port in solaris

Unable to open 3966 port for buildforge in Solaris 10, anyone pls help me how to open the 3966 port in solaris. Thanks in Advance (1 Reply)
Discussion started by: durgaprasadr13
1 Replies

9. Linux

using firewall to block port

Hi, I will like to allow access to the mysql port (3306) to certain IP address. All other IP's should be automatically blocked. What is the best way to do this? (8 Replies)
Discussion started by: shantanuo
8 Replies

10. Solaris

How to open SSH port on firewall?

Hi, So that potential responders will have an idea of what they're dealing with let me say that while I am a UNIX newbie I have been in IT for over 10 years. We have several SUN boxes running ver 5 of the OS that have been sitting dormant for some time as they were part of a now defunct... (3 Replies)
Discussion started by: pjewett
3 Replies

Featured Tech Videos