How to open some port for only OpenVNP clients?
I have a web service on an external server, and an openvpn server on the same machine.
I need to open port 80, but only for openvpn clients. In other words, if I do nmap-p 80 server_ip I expect to see filtred. However at the same time, if I connect to the vpn and do the same command, I expect to see open.
I'm a programmer, and I don't know much about network administration. If it is possible to make a couple of rules in iptables, please tell me how to write. If it is difficult, then tell me at least in what direction to look. I can not find, on the Internet, a similar case with an explanation of how to do it.
This time, I'm trying to do this on CentOs 7 with firewalld, can it be done using firewalld, or do I need to remove it, and do it via iptables?
linux iptables openvpn firewalld
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This question came from our site for professional and enthusiast programmers.
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I have a web service on an external server, and an openvpn server on the same machine.
I need to open port 80, but only for openvpn clients. In other words, if I do nmap-p 80 server_ip I expect to see filtred. However at the same time, if I connect to the vpn and do the same command, I expect to see open.
I'm a programmer, and I don't know much about network administration. If it is possible to make a couple of rules in iptables, please tell me how to write. If it is difficult, then tell me at least in what direction to look. I can not find, on the Internet, a similar case with an explanation of how to do it.
This time, I'm trying to do this on CentOs 7 with firewalld, can it be done using firewalld, or do I need to remove it, and do it via iptables?
linux iptables openvpn firewalld
migrated from stackoverflow.com 13 hours ago
This question came from our site for professional and enthusiast programmers.
add a comment |
I have a web service on an external server, and an openvpn server on the same machine.
I need to open port 80, but only for openvpn clients. In other words, if I do nmap-p 80 server_ip I expect to see filtred. However at the same time, if I connect to the vpn and do the same command, I expect to see open.
I'm a programmer, and I don't know much about network administration. If it is possible to make a couple of rules in iptables, please tell me how to write. If it is difficult, then tell me at least in what direction to look. I can not find, on the Internet, a similar case with an explanation of how to do it.
This time, I'm trying to do this on CentOs 7 with firewalld, can it be done using firewalld, or do I need to remove it, and do it via iptables?
linux iptables openvpn firewalld
I have a web service on an external server, and an openvpn server on the same machine.
I need to open port 80, but only for openvpn clients. In other words, if I do nmap-p 80 server_ip I expect to see filtred. However at the same time, if I connect to the vpn and do the same command, I expect to see open.
I'm a programmer, and I don't know much about network administration. If it is possible to make a couple of rules in iptables, please tell me how to write. If it is difficult, then tell me at least in what direction to look. I can not find, on the Internet, a similar case with an explanation of how to do it.
This time, I'm trying to do this on CentOs 7 with firewalld, can it be done using firewalld, or do I need to remove it, and do it via iptables?
linux iptables openvpn firewalld
linux iptables openvpn firewalld
asked Dec 19 at 16:36
Ilya Glinsky
migrated from stackoverflow.com 13 hours ago
This question came from our site for professional and enthusiast programmers.
migrated from stackoverflow.com 13 hours ago
This question came from our site for professional and enthusiast programmers.
add a comment |
add a comment |
1 Answer
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The easy bit
Easiest rule would be to block port 80 (and all un-used ports). Then add a rule before it to allow the local host 127.0.0.0/8 to connect to port 80.
This will cut out most of the possibilities, at least only processes on this machine can connect.
You can do this with the graphical fire-wall tool gufw. gufw is possibly the simplest file-wall tool, it can't do everything, but is simple, and can do a lot.
The harder bit
Next you need to stop processes on the machine connecting. But allow processes from the VPN user to connect, then run the VPN as a separate VPN user. (You can only control out-going connections by user.
I don't know of an easy tool that can do this, (I am not a firewall expert) but you can do it my editing iptables.
Do you have to remove firewalld?
I have not used filewalld, however I have used gufw, and directly edited iptable. I have not seen any conflicts.
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
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1 Answer
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1 Answer
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active
oldest
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active
oldest
votes
The easy bit
Easiest rule would be to block port 80 (and all un-used ports). Then add a rule before it to allow the local host 127.0.0.0/8 to connect to port 80.
This will cut out most of the possibilities, at least only processes on this machine can connect.
You can do this with the graphical fire-wall tool gufw. gufw is possibly the simplest file-wall tool, it can't do everything, but is simple, and can do a lot.
The harder bit
Next you need to stop processes on the machine connecting. But allow processes from the VPN user to connect, then run the VPN as a separate VPN user. (You can only control out-going connections by user.
I don't know of an easy tool that can do this, (I am not a firewall expert) but you can do it my editing iptables.
Do you have to remove firewalld?
I have not used filewalld, however I have used gufw, and directly edited iptable. I have not seen any conflicts.
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
add a comment |
The easy bit
Easiest rule would be to block port 80 (and all un-used ports). Then add a rule before it to allow the local host 127.0.0.0/8 to connect to port 80.
This will cut out most of the possibilities, at least only processes on this machine can connect.
You can do this with the graphical fire-wall tool gufw. gufw is possibly the simplest file-wall tool, it can't do everything, but is simple, and can do a lot.
The harder bit
Next you need to stop processes on the machine connecting. But allow processes from the VPN user to connect, then run the VPN as a separate VPN user. (You can only control out-going connections by user.
I don't know of an easy tool that can do this, (I am not a firewall expert) but you can do it my editing iptables.
Do you have to remove firewalld?
I have not used filewalld, however I have used gufw, and directly edited iptable. I have not seen any conflicts.
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
add a comment |
The easy bit
Easiest rule would be to block port 80 (and all un-used ports). Then add a rule before it to allow the local host 127.0.0.0/8 to connect to port 80.
This will cut out most of the possibilities, at least only processes on this machine can connect.
You can do this with the graphical fire-wall tool gufw. gufw is possibly the simplest file-wall tool, it can't do everything, but is simple, and can do a lot.
The harder bit
Next you need to stop processes on the machine connecting. But allow processes from the VPN user to connect, then run the VPN as a separate VPN user. (You can only control out-going connections by user.
I don't know of an easy tool that can do this, (I am not a firewall expert) but you can do it my editing iptables.
Do you have to remove firewalld?
I have not used filewalld, however I have used gufw, and directly edited iptable. I have not seen any conflicts.
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
The easy bit
Easiest rule would be to block port 80 (and all un-used ports). Then add a rule before it to allow the local host 127.0.0.0/8 to connect to port 80.
This will cut out most of the possibilities, at least only processes on this machine can connect.
You can do this with the graphical fire-wall tool gufw. gufw is possibly the simplest file-wall tool, it can't do everything, but is simple, and can do a lot.
The harder bit
Next you need to stop processes on the machine connecting. But allow processes from the VPN user to connect, then run the VPN as a separate VPN user. (You can only control out-going connections by user.
I don't know of an easy tool that can do this, (I am not a firewall expert) but you can do it my editing iptables.
Do you have to remove firewalld?
I have not used filewalld, however I have used gufw, and directly edited iptable. I have not seen any conflicts.
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
answered Dec 19 at 16:45
ctrl-alt-delor
10.6k41955
10.6k41955
add a comment |
add a comment |
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