Questions tagged [port-forwarding]
Port forwarding is the act of using redirecting one port to another, commonly used to access a computer from behind a firewall with NAT.
2,346
questions
240
votes
1
answer
509k
views
What is port forwarding and what is it used for?
There are a lot of questions on 'port forwarding', but there doesn't seem to be one that clearly states what it is and what it's used for. So:
What is port forwarding?
What is it used for, and why ...
97
votes
6
answers
154k
views
How do I remove an SSH forwarded port
I used ssh -L 10002:192.168.0.30:10002 192.168.1.135 to establish port forwarding but now I need to remove it.
How do I do this?
80
votes
2
answers
95k
views
Differences between ssh -L to -D
I'm trying to understand the differences between ssh -L to -D.
Is there anything else except for that -D is SOCKS only?
Thanks!
59
votes
5
answers
84k
views
Tunneling a TCP/IP Connection through Remote Desktop Connection
There is a remote Windows server on a private network which I can connect to via Remote Desktop Connection. I would like to be able to make TCP/IP connections from my computer to other computers on ...
56
votes
2
answers
22k
views
Can I make SSH fail when a port forwarding fails?
If I do a remote port forward, a la -R 3690:localhost:3690 when a binding already exists on the port on the remote host, I get this warning:
Warning: remote port forwarding failed for listen port ...
53
votes
7
answers
179k
views
How to make a port forward in Mac OS X
I'd like to make all incoming connections to port 1000 of my host (IP: 200.234.XXX.XXX) to be forward to the port 80 on host 10.211.55.5
How can I do it on my host? It is running Mac OS X 10.5.8
44
votes
4
answers
150k
views
Possible to "ping" url:port? (OS X-GeekTool)
I'm trying to use GeekTool (Mac pref pane... basically just embeds output of a shell command/script on the desktop... http://lifehacker.com/#!244026/geek-to-live--monitor-your-mac-and-more-with-...
41
votes
3
answers
86k
views
No idea what is listening on port 80 in OS X
I'm on OSX Mountain Lion 10.8.3, and I've freshly rebooted my Mac.
I want to start a service (like Apache on port 80), but there is already something going on with port 80:
telnet localhost 80
...
36
votes
3
answers
54k
views
How does port-forwarding help in torrents?
I use Transmission to download files but it says that a certain port is required to be opened. However, while this port is closed I noticed that I can still download files with no problem. But when I ...
35
votes
2
answers
146k
views
SSH: Troubleshooting "Remote port forwarding failed for listen port" errors
Question: Why does ssh -N -R 2222:localhost:22 <bluehost_user>@<bluehost_ip> result in a "Remote port forwarding failed for listen port" error? The objective is to establish a ...
28
votes
3
answers
136k
views
Are there good alternative HTTP ports rather than port 80?
I have been looking for some documentation on alternatives to port forwarding to port 80. I have a dedicated Linux machine on a home router, and apparently utilizing port 80 is not an option.
Are ...
27
votes
2
answers
55k
views
Chrome ssh tunnel forwarding
I am first logging into an ssh server. Then I am trying to use Chrome for ssh tunnel forwarding. Is there a gui way of doing this? I can do this in Firefox's gui in like 10 seconds so I would think ...
26
votes
4
answers
30k
views
DD-WRT: How to allow port forwarding to apply to requests originating from inside the LAN?
With the original firmware of my router I had port forwarding defined from port 80 to the server in the LAN, which I used in conjunction with an external dynamic DNS service.
I've now upgraded to DD-...
26
votes
1
answer
86k
views
NAT vs. port forwarding [duplicate]
Possible Duplicate:
What is port forwarding and what is it used for?
What is the difference between NAT and port forwarding? Are they two different names for the same thing? What would be a short ...
25
votes
6
answers
90k
views
Set up a web server behind a Carrier Grade NAT
I was trying to set up a small home server.
I use dynamic IP adress. My router's wan adress is like this 100.70.81.xxx and my public ip is 81.213.177.xx
I made port forwarding in my router. www, ...
24
votes
4
answers
76k
views
Port Forwarding to a VMware Workstation Virtual Machine
I am running VMware Workstation 8 (build 471480). I want to setup a small content server, mainly for images and such for my website, on my desktop in a virtual server (just for the heck of it)... I ...
22
votes
3
answers
42k
views
I keep on getting a error when I connect to a ssh tunnel on putty
I'm using the current version of putty 0.66 and I keep on getting this error
Disconnected: Server protocol violation: unexpected SSH2_MSG_UNIMPLEMENTED packet
when I try to connect to a ssh ...
22
votes
5
answers
73k
views
Howto disable SSH local port forwarding?
I have a server running Ubuntu and the OpenSSH daemon. Let's call it S1.
I use this server from client machines (let's call one of them C1) to do an SSH reverse tunnel by using remote port ...
20
votes
3
answers
26k
views
SSH port forwarding without session
I am trying to forward my port 8085 which is a live camera stream port for a mini http server, to a remote server.
My command which I am using is as so:
ssh -R $rport:dc-bb7925e7:$camport -p 25 ...
20
votes
1
answer
123k
views
Windows Firewall: How to allow traffic on a specific port (eg. 8080)?
I am trying to configure team Foundation Server so that:
It is accessible from within my Home Network, and
The Web site is accessible via the Internet
I have a problem with point 1:
When I access ...
20
votes
1
answer
11k
views
SOCKS vs. SSH local port forwarding
What's the difference between using SOCKS (SSH -D) and local port forwarding (SSH -L)
19
votes
8
answers
52k
views
ssh through a router without port forwarding
I have a linux server, and I want to put it in a home network behind a router. I need to ssh to this server sometime from outside, but I don't want to set up port forwarding because I don't have ...
18
votes
2
answers
67k
views
Windows 10 - NAT - Port forwarding & IP masquerade
I'm looking for a way to get iptables functionality in windows 10. I enabled IP routing and I need to forward tcp data to another host (port 8080) and then forward his response while masquerading IP. ...
17
votes
1
answer
24k
views
Is there a script to add port forwarding rule in home router?
TL;DR:
I am looking for a script or a cron job, which will periodically run on a linux host (fedora on raspberry pi) which will check if a port forwarding rule still exists in the router and add it if ...
16
votes
3
answers
22k
views
VirtualBox command-line - setting up port forwarding
I know how to configure NAT-based port forwarding using the VirtualBox graphical interface (as in the example below).
How can I do the same via the command line?
16
votes
1
answer
23k
views
pfctl port forwarding in Mac osx?
-A PREROUTING -s 10.0.10.0/24 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080
-A PREROUTING -s 10.0.10.0/24 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 8080
-A POSTROUTING -s 10.0.10.0/24 -o ...
16
votes
2
answers
52k
views
Are virtual servers and port forwarding the same thing?
Are virtual servers and port forwarding the same thing?
I always thought so but my Dlink DIR-655 has both.
The only thing I can see with port forwarding is the ability to do ranges whereas virtual ...
15
votes
3
answers
89k
views
Allowing a friend to connect over the internet to a Minecraft server I've hosted?
I have set up a Minecraft server and have built lots of things, now I want my friend to play on it too.
I'm hosting it on my home computer and don't want to have to set up a new server elsewhere so ...
14
votes
3
answers
33k
views
UPnP port mapping client for Linux
Is there any client that can request mapping and unmapping ports via UPnP port mapping behind a NAT gateway?
I had problem with PortMap. I want this mostly for testing purposes.
14
votes
2
answers
7k
views
MOSH into bastion server, SSH into internal hosts
I have ssh configured to automatically forward through the bastion host:
Host bastion_host
HostName bastion.example.com
Host internal_host
ProxyCommand ssh -q bastion_host nc -q0 ...
14
votes
1
answer
4k
views
How to convert “ipfw” to “pfctl” commands to forward port 80 and 443 in OS X?
I found a way to forward ports 80 and 443 to other arbitrary ports (3000 and 3001 in my case) using ipfw. But ipfw is deprecated and replaced by pfctl. Here are my ipfw declarations:
sudo ipfw flush
...
13
votes
5
answers
16k
views
Can I run both a primary and secondary DNS server using the same public IP?
I need to set up a DNS server to manage the DNS for my domain name.
According to the guide I am following, I need to have both a Primary and Secondary DNS server. I easily created two VMs on my ...
13
votes
3
answers
154k
views
How safe is port forwarding in general? [closed]
Say I have a few ports open for gaming.
My questions are
Can I be hacked if the attacker knows my specific external IP?
Can hacker access my router and setting by getting through these ports? If so, ...
13
votes
1
answer
106k
views
Port is open, but can't access it via external IP address
I have RavenDB running on localhost:8080. I would like to make it externally accessible, just as a test (ignore security concerns for now).
To do so, I configured my router to forward external port ...
12
votes
4
answers
10k
views
Unable to access outside service from inside LAN
I have a weird port forwarding problem. I tried to open my port 22 to the outside network. I was able to access it as long as I am not inside the LAN. I can access it from my office for example. But ...
12
votes
1
answer
35k
views
Windows Subsystem for Linux & SSH Port Forwarding
Is it possible to use SSH port forwarding in Windows Subsystem for Linux?
If I download the native OpenSSH package, I can forward ports:
> ssh -L 5432:localhost:5432 me@host
Welcome to Ubuntu 16....
10
votes
1
answer
91k
views
Does Wake-on-LAN via WAN needs port forwarding?
If yes, how does it work? The pc still has no ip, so where should I forward the port?
10
votes
1
answer
70k
views
How safe is it to open ports on your router? [closed]
I want to open some ports on my family's network, for game servers and other protocols like HTTP and FTP. My dad, however, thinks this is unsafe (for him).
Is it easy for a hacker to get in to our ...
9
votes
4
answers
41k
views
Configure Tor as a listening proxy server that I can connect to remotely?
I currently have the Vidalia bundle installed on my Windows Server 2008 R2 machine. Is there a way that I can connect to the Tor network through this computer from other computers on the LAN or from ...
9
votes
4
answers
3k
views
Remote connection to a PC over internet [closed]
I have a PC running Windows Vista Home Premium with Norton Internet Security 2009. I like to help my father and sister by connecting their PCs over the internet and taking full control. My father has ...
9
votes
3
answers
5k
views
Iptables forwarding port/s to a external IP transparently (remote end should see the actual source IP)
The question is simple but I think the answer might not be as I went through countless related topics with no concrete reply.
I wish to forward a port 1234 from x.x.x.x to y.y.y.y (both on internet ...
9
votes
2
answers
26k
views
Access external IP from inside the network?
I have setup a subdomain sub.example.com in the DNS-records of my domainname-provider that I linked to my external IP. I then forwarded port 80 in the router (Sitecom Broadband Router 54G) to the IP ...
9
votes
1
answer
16k
views
SSH dynamic port forwarding, "Connection refused"
I am trying to do dynamic portforwarding using openssh through a remote computer following this command:
ssh -D 6789 rohan@<remote_ip> -p <remote_port>
This should set up a socks ...
9
votes
1
answer
1k
views
Commandline configuring portforwarding service with whitespace
We have a ZyXEL VMG8324-B10A router at home. I am able to log in via ssh and use the command portforward --help, which results in the following output:
Usage: portforward config <ServiceName> --...
9
votes
5
answers
43k
views
Get Windows localhost (port 80) to forward to port 8080 for Apache service
Recent Discovery
With IIS set back to port 80, when I put in http://localhost/ on the WHS computer, it gives me the "There is a problem with this website's security certificate" warning page. If I "...
9
votes
0
answers
8k
views
Why is there no UDP port forwarding in SSH?
I know SSH can forward TCP ports, not UDP. I'm not seeking help to circumvent this restriction (this subject is covered here).
I'd like to know what is the reason SSH never got UDP forwarding ability....
8
votes
1
answer
12k
views
How to choose open port number?
I installed easyPHP and opened a port on my firewall so that other people can access to my webserver. The default port is 8888. But I am wondering how do you choose a port number? Is it really ...
8
votes
5
answers
16k
views
Port forwarding software (service) for Windows
I have a server service that uses 8182 port. Somebody want to connect to this, but 8182 port is unavailable for him, only 5118 is working fine.
No problem I thought, I just install port forwarder ...
8
votes
5
answers
12k
views
How to ssh into home LAN behind ISP NAT (no public IP address)?
My property management company provides free internet access. All the apartments in many buildings are behind some common NAT, so none of us have our own public IP addresses. Thus, services like ...
8
votes
3
answers
8k
views
Stable reverse port forwarding in SSH and stale sessions
Using VPS to forward ports behind NAT:
for((;;)) { ssh -R 2222:127.0.0.1:22 [email protected]; sleep 10; }
When connection is broken somehow and it is reconnecting.
Warning: remote port forwarding ...