Questions tagged [port-forwarding]
Port forwarding is a process consisting in the translation of a host:port couple into another host2:port2 couple, both submitted to the same network mask.
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DLNA Port Forwarding using SSH
I want to forward remote DLNA-Server (Plex DLNA), which is running on an VPS per SSH Forwarding to my LAN.
I experimented already with Local Port Forwarding to get Plex (Port 32400) from VPS working ...
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0answers
12 views
HAProxy as a reverse proxy for backend already ssl enabled and SSL terminator for a backend exposed in port 80
I have 4 servers:
proxy_server,
$BK_SERVER_001,
$BK_SERVER_002 and
$BK_SERVER_003
The "proxy_server" only has an HAProxy enabled service with this configuration:
(please look at the rows marked ...
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0answers
16 views
How to chain two proxies, or: How to redirect network traffic from one process, to a local proxy
Here's the scenario: I have a proxy, that when Chrome is setup to map requests to, records the requests from Chrome + the responses from the real server. It records all of this in a special format, so ...
1
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1answer
58 views
Why ip_forward is disable by default? any side effect?
I need to forward an interface and I wonder why is disable by default? There is any security issue when I enable it? Is there any side effect when I enable it?
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0answers
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Embedding in iframe web-application at a port on another application in the same server
I have an application at say port 5000 which can render embedded iframes.
https://host-public-ip:5000/
I have a second application on say port 6000. I would like to embed this page in an iframe in ...
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0answers
26 views
ssh reverse tunnel with dynamic port for backup over ssh in DMZ
I'd like to do backup over ssh on a server in DMZ, the backup would be executed by a backup server which can ssh to DMZ. I was thinking to use reverse ssh port forwarding with dynamic port, ie. ssh -R ...
1
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0answers
35 views
Accessing nginx behind a Virtual Server looses port number
I have a Debian server running nginx with the following nginx configuration:
server {
listen 80 default_server;
root /var/www/serviceserver1;
index index.html index.htm;
location /api ...
2
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4answers
62 views
Can not access ssh fowarding port
I have two servers, Server A has a public IP address(43.24.24.29), Server B has a private IP address(10.10.10.1).
and Server A can connected to Server B by its public IP address(maybe there has some ...
0
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1answer
56 views
Host refused connection when using ftp
I need to connect to my server using FTP, but connection refuses. I have been using SFTP that is working just fine (both locally and externally). Using linux debian. I am able to login with ftp ...
0
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1answer
28 views
How can I make a service running in Guest VM in VirtualBox accessible outside the VM
I use Oracle VirtualBox and have a service that runs on a guest VM. If I'm under guest OS and open the service URL in Firefox the app works as expected:
https://localhost:8443
I was told that I can ...
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0answers
78 views
Using socat to access deluge daemon in a different namespace
I'm using namespaced-openvpn to ensure that my torrent traffic in deluge is always behind a VPN.
A modified script from this blog post helped to connect the VPN namespace to the real network:
ip ...
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0answers
158 views
VSFTPD refuses to list directory when PASV is enabled
I'm configuring VSFTPD on Ubuntu 18.04 and have followed all the guidelines. It's working OK for plain FTP (insecure), however as soon as I enable SSL/TLS and Passive mode, it connects, but I am ...
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0answers
38 views
IPTables and Port Forwarding on an OpenVPNAS Server
I have a new OpenVPNas server running on CentOS 7 (Not married to CentOS 7). That I working on replacing an expensive Commercial VPN that has a Public Static IP. Being that the OpenVPNas server is ...
2
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0answers
62 views
Kernel modules for iptables ftp forward
I have two ARM devices connected to each other with TCP/IP, one of them is connected to my network, on the other one is FTP server.
I'm trying to set up port forwarding to ftp using conntrack and ...
0
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1answer
72 views
Which concept does ssh “proxy jump” belong to: proxy, port forwarding or something else?
Which concept does ssh "proxy jump" belong to: proxy, port forwarding or something else?
By ssh "proxy jump", I mean either
ssh -J user@vmhost user@vmguest
or in ~/.ssh/config:
Host vmhost
...
0
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1answer
146 views
Setup IP and port forwarding in AWS
I have a web server in AWS EC2 for example with http://11.22.33.44 listening to port 80. I would like to do something like port forwarding such as if I'm browsing the website IP from my home network ...
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0answers
20 views
Local port forwarding not working [duplicate]
I'm learning what port forwarding is and how to do it.
I run this command:
ssh -L 6900:https://wwww.google.com:80 localhost
but when I try to reach localhost:6900, I receive:
What am I doing wrong?
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1answer
24 views
reusing same port in a tcp application under different namespaces on linux VM
i have a linux VM with 2 interfaces, eth0 has mgmt IP and eth1 has configuration as below
ip netns exec eng51 ifconfig
eth1.51 Link encap:Ethernet HWaddr 52:54:00:bd:68:c3
inet addr:51.51....
0
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0answers
54 views
Bind SSH client to two different host addresses
I have this port forwarding solution for testing purposes. There is a distant server named box and a local machine named tower, on two separate networks. box is accessible through the internet.
On ...
1
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0answers
84 views
Do VPN and SSH reverse port forwarding achieve the same thing?
https://en.wikipedia.org/wiki/Virtual_private_network
A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or ...
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0answers
173 views
Port forwarding in Linux for UDP doesn't work
I'm trying to apply a port forward rule to forward UDP traffic from my AP on port 53 to a custom DNS server listening to 9053. I tried various calls. None of them worked. I've tried this in Kali. ...
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0answers
37 views
port forwarding using mptcp
I installed mptcp on two systems mptcp installation
I followed this site to install mptcp and its working perfectly I check this site also mptcp check both systems will work perfectly. I want to ...
4
votes
1answer
199 views
How to setup simple port forwarding on macOS with pf? “Rules must be in order: options, normalization, queueing, translation, filtering”
I am trying to pass traffic from Mac A port 5800 to Mac B on port 5900 using pf.
This is the intended path of travel:
Client to port 5800 → Router (Yes, port forwarding is setup here) → Mac with PF →...
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1answer
245 views
Why hostfwd option of QEMU need root access in some times and doesn't need some times
This command of QEMU doesn't need root access :
qemu-system-x86_64 -m 3072 -smp 2 -hda Debian9.qcow2 -device e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::5555-:22,hostfwd=tcp::9000-:9000
When ...
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0answers
44 views
Port forwarding over OpenVpn
I wanted to host few gameservers on my home network to play with my buddies, the thing is having a public ip is like begging to get DDoS'ed, so what ive done is i have set up a OpenVPN server on a ...
0
votes
1answer
166 views
Port forward from external postgresql to localhost
I have several databases hosted outside the application server, ex:
DB instances:
192.168.178.21:5432
192.168.178.22:5432
192.168.178.23:5432
app-server: 192.168.178.11
now I want to forward the ...
0
votes
1answer
662 views
Forward all traffic to a socks5 proxy port
I followed this answer: Redirect all non-local traffic to a socks proxy
root@xxx:~# cat /proc/sys/net/ipv4/ip_forward
1
root@xxx:~# netstat -tapln | grep :4545 | grep LISTEN
tcp 0 0 127....
1
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1answer
1k views
“Not running dhcpcd because /etc/network/interfaces defines some interfaces that will use a DHCP client or static address”
Deployment:
VM -- (eth0)RPI(wlan0) -- Router -- ISP
^ ^ ^ ^
DHCP Static DHCP GW
NOTE: RPI hostname: gateway
• The goal was to make VMs accessible from the outside ...
0
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0answers
362 views
socat - UNIX-LISTEN and TCP-LISTEN in one command
Is it possible, to open a tcp port and a socket with one process/command?
socat UNIX-LISTEN:/var/run/mysqld/mysqld.sock,fork,user=mysql,group=mysql,mode=777 TCP:123.123.123.1:3306
combined with:
...
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3answers
248 views
How is SOCKS protocol used in SSH dynamic port forwarding? [duplicate]
When creating connection(s) between application client and application server via SSH dynamic port forwarding by ssh -D, how is SOCKS protocol used?
Is SOCKS used as a protocol for communication
...
-1
votes
1answer
148 views
Is SSH X forwarding an example of remote port forwarding?
Is SSH X forwarding an example of remote port forwarding?
I feel like so.
How can SSH X forwarding be done in terms of SSH remote port forwarding command?
Thanks.
-2
votes
1answer
45 views
In port forwarding, is the ultimate destination decided solely by the intermediary entity? [closed]
In port forwarding, is the ultimate destination to connect to solely decided by the intermediary entity which provides port forwarding, not by an application client?
Although the page mentions ...
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2answers
114 views
How to keep a SSH session for dynamic forwarding alive and terminate it at will? [closed]
I found someone keeps a SSH session alive by
ssh -f -D $port $SSH_HOST "
if [ -f ~/.tunnel ]; then
rm ~/.tunnel;
fi;
while [ ! -f ~/.tunnel ]; do
echo > /dev/null;
...
1
vote
1answer
30 views
Does working in different protocols cause difference in the destinations of local/remote and dynamic forwarding?
Dynamic port forwarding using SSH knows where a request wants to go and sends it there, which is said to be due to using the SOCKS protocol.
Local and remote port forwarding using SSH forward a ...
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1answer
63 views
How does SSH used for dynamic port forwarding know where a request wants to go?
Dynamic port forwarding using SSH uses SOCKS protocol. How does SSH know where a request wants to go? For example if the request is a HTTP request, SSH doesn't understand HTTP, so where does it find ...
0
votes
1answer
42 views
How to choose the target forwarding address?
SSH the Definite Guide says
Suppose you want to forward a connection from your local machine to
remote.host.net. Both of the following commands work:
$ ssh -L2001:localhost:143 remote.host.net
$ ...
2
votes
1answer
151 views
How is “Forwarding can be also done through Unix sockets” done?
https://zaiste.net/ssh_port_forwarding/#remote-port-forwarding
Remote port forwarding is created with -R parameter.
ssh -R source_port:forward_to_host:destination_port via_host
This command ...
2
votes
1answer
45 views
What is the forward_to_host in remote port forwarding?
https://zaiste.net/ssh_port_forwarding/#remote-port-forwarding
Remote port forwarding is created with -R parameter.
ssh -R source_port:forward_to_host:destination_port via_host
This command ...
-1
votes
1answer
48 views
What are the relations and differences between port forwarding and proxy?
Is an entity which performs port forwarding considered as a proxy? If not, what is it?
A proxy is transparent to users of the clients of its proxied server: a user sends a request to a destination ...
-3
votes
1answer
168 views
Why is SSH protocol not connecting to destination successfully?
In firefox, I can connect to google.com:80. But after
$ ssh -L 9000:google.com:80 testme@localhost
in firefox, I connect to http://localhost:9000/, an then
That’s an error.
The ...
4
votes
1answer
238 views
Forward abstract unix socket over SSH?
I've discovered that OpenSSH is capable of forwarding UNIX sockets like this:
ssh -R /var/run/program.sock:/var/run/program.sock
My question is whether this extends to abstract unix sockets too.
I'...
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vote
2answers
521 views
Creating a ssh config for a reverse tunnel + local forward
I'm trying to create a ~/.ssh/config entry for the following scenario:
I have a linux box in a private network somewhere, a vps server which is accessible from anywhere and my local macbook.
The ...
0
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0answers
61 views
Forwarding ports from OpenVPN server on VPS to OpenVPN client
I have running OpenVPN on my VPS which have static ip address. OpenVPN works as expected but I am not able to forward ports to OpenVPN client. I have tried few iptables rules but no luck. These are ...
0
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0answers
24 views
Forwarding port from VPS to local with OpenVPN
My ISP has me double-NAT'ed me so I can't open any ports. I want to forward all connections via port 9292 through VPS's IP to OpenVPN so I can listen port 9292 from my local network when I connected ...
0
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0answers
14 views
OpenVPN Gateway with Killswitch and Prerouting Ports
My Prerouting in UFW Doesnt work. I´m using an VPN Connection via tun0.
Internet Connections via tun0 as a gateway works but not the Port Forwarding.
im on debian Strech 9
UFW Before Rules. Only ...
1
vote
1answer
112 views
ssh port forward when connected with ssh in script
when I am connected to a device over SSH, I know how to forward local ports; first enter ssh menu with [ENTER} ~C, then:
-L 4455:ip:80
This will make localhost:4455 on my local machine go to port ...
0
votes
1answer
30 views
One port is listening with an * and the other is listening with 127.0.0.1 and only the first is accepting remote connections
Please see the attached picture below, and then I will explain:
So, I have Solr running which uses port 8983. And as you can see in the screen shot, it's listed as "TCP *:8983 (LISTEN)". And, it's ...
1
vote
1answer
57 views
iptables blocking local traffic
My local machine IP: 192.168.0.35
What I did: Answer that i tried here!!
sudo iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80
The error:
Now I can not access ...
0
votes
1answer
184 views
How to check if port is open and unused?
I am currently at my uni and connected to uni's network. I set up a server on my PC but noone can connect from outside uni network because ports are blocked, however I have access to one of uni's ...
0
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0answers
67 views
SSH connection failure: processing of forwarded request fails on known_host key
When I attempt a SSH connection between client C and server S (both on the same LAN) the client looks up the server's key in the client user's known_hosts file.
In the usual case for connection ...
