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0

I would like to ask question regarding to forward-port rule for firewalld.

OS I am using is ,

CentOS Linux release 7.3.1611 (Core)

My Goal

Forward requests to httpd listening on 127.0.0.1:80

[root@development /]# netstat -atunp | grep httpd
tcp 0 0 127.0.0.1:80 0.0.0.0:* LISTEN 2601/httpd 

Problem

I have set firewalld rule as below.

[root@development /]# firewall-cmd --list-all --zone=external
external (active)
 target: default
 icmp-block-inversion: no
 interfaces: eth0
 sources: 
 services: ssh
 ports: 
 protocols: 
 masquerade: yes
 forward-ports: 
 sourceports: 
 icmp-blocks: 
 rich rules: 
 rule family="ipv4" forward-port port="8080" protocol="tcp" to-port="80"

However, if I send request from external host, firewalld rejects request to port 8080.

In this case,

192.168.11.2 (client) -------> 192.168.11.13 (8080)

[root@dellinspiron13z asset]# curl -XGET 192.168.11.13:8080
curl: (7) Failed to connect to 192.168.11.13 port 8080: Connection refused

If the process is running as 0.0.0.0:80 , it works perfectly.

Is there anyway to redirect requests to localhost port?

linux-networking firewalld

share|improve this question

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

add a comment | 

0

I would like to ask question regarding to forward-port rule for firewalld.

OS I am using is ,

CentOS Linux release 7.3.1611 (Core)

My Goal

Forward requests to httpd listening on 127.0.0.1:80

[root@development /]# netstat -atunp | grep httpd
tcp 0 0 127.0.0.1:80 0.0.0.0:* LISTEN 2601/httpd 

Problem

I have set firewalld rule as below.

[root@development /]# firewall-cmd --list-all --zone=external
external (active)
 target: default
 icmp-block-inversion: no
 interfaces: eth0
 sources: 
 services: ssh
 ports: 
 protocols: 
 masquerade: yes
 forward-ports: 
 sourceports: 
 icmp-blocks: 
 rich rules: 
 rule family="ipv4" forward-port port="8080" protocol="tcp" to-port="80"

However, if I send request from external host, firewalld rejects request to port 8080.

In this case,

192.168.11.2 (client) -------> 192.168.11.13 (8080)

[root@dellinspiron13z asset]# curl -XGET 192.168.11.13:8080
curl: (7) Failed to connect to 192.168.11.13 port 8080: Connection refused

If the process is running as 0.0.0.0:80 , it works perfectly.

Is there anyway to redirect requests to localhost port?

linux-networking firewalld

share|improve this question

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

add a comment | 

I would like to ask question regarding to forward-port rule for firewalld.

OS I am using is ,

CentOS Linux release 7.3.1611 (Core)

My Goal

Forward requests to httpd listening on 127.0.0.1:80

[root@development /]# netstat -atunp | grep httpd
tcp 0 0 127.0.0.1:80 0.0.0.0:* LISTEN 2601/httpd 

Problem

I have set firewalld rule as below.

[root@development /]# firewall-cmd --list-all --zone=external
external (active)
 target: default
 icmp-block-inversion: no
 interfaces: eth0
 sources: 
 services: ssh
 ports: 
 protocols: 
 masquerade: yes
 forward-ports: 
 sourceports: 
 icmp-blocks: 
 rich rules: 
 rule family="ipv4" forward-port port="8080" protocol="tcp" to-port="80"

However, if I send request from external host, firewalld rejects request to port 8080.

In this case,

192.168.11.2 (client) -------> 192.168.11.13 (8080)

[root@dellinspiron13z asset]# curl -XGET 192.168.11.13:8080
curl: (7) Failed to connect to 192.168.11.13 port 8080: Connection refused

If the process is running as 0.0.0.0:80 , it works perfectly.

Is there anyway to redirect requests to localhost port?

linux-networking firewalld

share|improve this question

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

CentOS Linux release 7.3.1611 (Core)

[root@development /]# netstat -atunp | grep httpd
tcp 0 0 127.0.0.1:80 0.0.0.0:* LISTEN 2601/httpd 

[root@development /]# firewall-cmd --list-all --zone=external
external (active)
 target: default
 icmp-block-inversion: no
 interfaces: eth0
 sources: 
 services: ssh
 ports: 
 protocols: 
 masquerade: yes
 forward-ports: 
 sourceports: 
 icmp-blocks: 
 rich rules: 
 rule family="ipv4" forward-port port="8080" protocol="tcp" to-port="80"

[root@dellinspiron13z asset]# curl -XGET 192.168.11.13:8080
curl: (7) Failed to connect to 192.168.11.13 port 8080: Connection refused

share|improve this question

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

share|improve this question

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

asked Jul 23 '17 at 11:31

Yu WatanabeYu Watanabe

3211214

2 Answers
2

active

oldest

votes

0

You have to change route_localnet in sysctl on interface with address 92.168.11.13 or for 'all' if you lazy

In lucky coincidence I have fresh CentOS with same version, so by default this knob is disabled

[root@tesla ~]# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 
[root@tesla ~]# sysctl -a | grep route_localnet
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.enp0s5.route_localnet = 0
net.ipv4.conf.lo.route_localnet = 0

share|improve this answer

answered Jul 23 '17 at 16:11

ScypiScypi

1404

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Didnt work. I think I am still missing something.
  
  – Yu Watanabe
  Jul 28 '17 at 0:15
  

  
  
  
  

add a comment | 

0

This is how it is done:

firewall-cmd --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 8080 -j REDIRECT --to-ports 80

share|improve this answer

answered Feb 23 '18 at 14:07

aryeharyeh

1112

add a comment | 

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0

You have to change route_localnet in sysctl on interface with address 92.168.11.13 or for 'all' if you lazy

In lucky coincidence I have fresh CentOS with same version, so by default this knob is disabled

[root@tesla ~]# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 
[root@tesla ~]# sysctl -a | grep route_localnet
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.enp0s5.route_localnet = 0
net.ipv4.conf.lo.route_localnet = 0

share|improve this answer

answered Jul 23 '17 at 16:11

ScypiScypi

1404

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Didnt work. I think I am still missing something.
  
  – Yu Watanabe
  Jul 28 '17 at 0:15
  

  
  
  
  

add a comment | 

0

You have to change route_localnet in sysctl on interface with address 92.168.11.13 or for 'all' if you lazy

In lucky coincidence I have fresh CentOS with same version, so by default this knob is disabled

[root@tesla ~]# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 
[root@tesla ~]# sysctl -a | grep route_localnet
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.enp0s5.route_localnet = 0
net.ipv4.conf.lo.route_localnet = 0

share|improve this answer

answered Jul 23 '17 at 16:11

ScypiScypi

1404

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Didnt work. I think I am still missing something.
  
  – Yu Watanabe
  Jul 28 '17 at 0:15
  

  
  
  
  

add a comment | 

You have to change route_localnet in sysctl on interface with address 92.168.11.13 or for 'all' if you lazy

In lucky coincidence I have fresh CentOS with same version, so by default this knob is disabled

[root@tesla ~]# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 
[root@tesla ~]# sysctl -a | grep route_localnet
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.enp0s5.route_localnet = 0
net.ipv4.conf.lo.route_localnet = 0

share|improve this answer

answered Jul 23 '17 at 16:11

ScypiScypi

1404

[root@tesla ~]# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core) 
[root@tesla ~]# sysctl -a | grep route_localnet
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.enp0s5.route_localnet = 0
net.ipv4.conf.lo.route_localnet = 0

share|improve this answer

answered Jul 23 '17 at 16:11

ScypiScypi

1404

answered Jul 23 '17 at 16:11

ScypiScypi

1404

answered Jul 23 '17 at 16:11

ScypiScypi

1404

0

This is how it is done:

firewall-cmd --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 8080 -j REDIRECT --to-ports 80

share|improve this answer

answered Feb 23 '18 at 14:07

aryeharyeh

1112

add a comment | 

0

This is how it is done:

firewall-cmd --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 8080 -j REDIRECT --to-ports 80

share|improve this answer

answered Feb 23 '18 at 14:07

aryeharyeh

1112

add a comment | 

This is how it is done:

firewall-cmd --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 8080 -j REDIRECT --to-ports 80

share|improve this answer

answered Feb 23 '18 at 14:07

aryeharyeh

1112

share|improve this answer

answered Feb 23 '18 at 14:07

aryeharyeh

1112

answered Feb 23 '18 at 14:07

aryeharyeh

1112

answered Feb 23 '18 at 14:07

aryeharyeh

1112