Tagged Questions

2
votes
1answer
22 views

How to set mark on packet when forwarding it in nat prerouting table?

I have a few port forward rules like this iptables -t nat -A PREROUTING -p tcp --dport 46000 -j DNAT --to-destination 172.16.8.2:46000 iptables -A FORWARD -p tcp -d 172.16.8.2 --dport 46000 -j ACCEPT ...
0
votes
0answers
23 views

Is there a way to diagnose *where* comms to a port on a windows machine is being blocked?

I am developing a system that comprises an email server. I have so far been unable to connect on port 25 (using telnet), despite having checked the following are set up correctly. Connections to port ...
0
votes
2answers
64 views

DSL routing - NAT Virtual server - port forwarding - static ip address

My NAT virtual server - port forwarding has been working fine up to the past couple of weeks. All in a sudden, it doesn't work. Setting was done as shown on the link: I'm afraid it no longer ...
-1
votes
1answer
40 views

What ports do I need to forward (beside 3389) to make RDP work? [closed]

On my local network, I have 2 PCs, first one has RDP connections enabled (it's winserver 08). From the second one, I am successfully connecting to the first one (inside my LAN). But I need to enable ...
0
votes
2answers
98 views

cisco ip nat / port forwarding

I have been trying to get port forwarding working with a newly installed cisco router. I cannot seem to find where my fault is and have been looking for quite a while. The relevant section of my ...
0
votes
1answer
177 views

Configuring UPnP on pfSense

I need a little help configuring UPnP on pfSense. I have installed pfSense between ADSL connection and connecting internal router. There are two video servers behind the router that need port 80, ...
0
votes
0answers
62 views

Port forward http requests to server connected to a VPN?

I have a (Ubuntu) server on the LAN connecting to an OpenVPN server so that apps running on both machines can talk to each other over the Internet. Works great. All traffic to the WAN routes out ...
-1
votes
1answer
57 views

Two or more services on same port behind NAT [closed]

I think this question is not first but all what I see don't useful for me. Ok, for example I have my network behind NAT where I want setup two http servers on the different hosts. How I can perform ...
0
votes
3answers
346 views

Using a nat rule to translate 80/443 traffic to web server, but internal users cannot access it using external ip/domain name

I am using Cisco ASDM for ASA I have my internal network called soa. My outside interface is called outside. Let's say my outside IP given to me by my ISP isp is y.y.y.y I have a web server inside ...
0
votes
1answer
89 views

How to handle DNS at the firewall

I'm running in to a mental roadblock trying to figure this one out. We have a Juniper firewall at our office and we do a lot of port forwarding to reach internal services that we need to access from ...
0
votes
1answer
92 views

postfix behind a gateway [closed]

I'm under linux ubuntu. I build a gateway that relay only http/https traffic toward the inner networK. I install on the web server postfix to only send email from the inner server to outside. only ...
-4
votes
2answers
87 views

How to access an IP address as if on a different network using SSH [closed]

In preparation for a lengthy business trip, I set up my router such that I can access my home computer over the internet via port forwarding over SSH. One thing I neglected to do was setup access to ...
0
votes
1answer
188 views

NAT ing to port 80 not working,when request comes to itself

We have a machine with Virtual Machine with local IP NAT ed to Public IPs. When a request comes to public IP on port 80 it will be redirected to VM with local IP. This is the iptable rule we are ...
1
vote
1answer
1k views

Possible to port-forward from a Sonicwall (TZ200 series) WAN side through a VPN tunnel? (Answer: Yes)

TL;DR Can a Sonicwall TZ200 series port-forward to a host not on the local internal subnet? If so, can that host be one accessed through a VPN tunnel with the Sonicwall as one endpoint? We have an ...
0
votes
1answer
687 views

Cisco 800 series won't forward port

I am trying to forward port 444 from my cisco router to my Web Server (192.168.0.2). As far as I can tell, my port forwarding is configured correctly, yet no traffic will pass through on port 444. ...
3
votes
2answers
1k views

Forward differing hostnames to different internal IPs through NAT router

I have one public IP address, one router and multiple servers behind the router. I would like to forward differing domains (All using HTTP) through the router to different servers. For example: ...
1
vote
2answers
363 views

Can I setup a DNS alias to point to a a machine behind the firewall?

A little confusing question, but here's what I'm trying to do. I have port forwarding setup so that we can use 1 static IP to RDP into different machines behind our firewall. For instance My Dev ...
2
votes
1answer
2k views

How to forward host ports of < 1024 to a VirtualBox NAT-connected machine?

The manual says: "Forwarding host ports < 1024 impossible: On Unix-based hosts (e.g. Linux, Solaris, Mac OS X) it is not possible to bind to ports below 1024 from applications that are not run by ...
0
votes
1answer
162 views

Port forwarding from non-default internet connection

I have two outgoing connections, pointing to different ISPs, on a gateway, in front of small-ish LAN. IPs addresses are as follows: ISP 1: network: 10.1.1.0/24 gateway ip: 10.1.1.1 client ip: ...
2
votes
3answers
345 views

Port forwarding over the Internet

I hope I'm on the right website as it is my first question here!! So here is my situation I have a small server hosted at home behind a DSL line for which I have a static IP. Now I would like to have ...
0
votes
2answers
221 views

Software Port Forwarding on Windows?

I have a Windows machine serving a couple web apps through Apache. I am looking for a software solution that will allow me to continue accepting requests on this computer (Windows XP) but forward the ...
0
votes
1answer
737 views

pf port forwarding

I've got the basics of my pf firewall/NAT router setup working; traffic going out fine, DNS requests on port 53 mapped into an internal subnet and back out again successfully (no change in port ...
4
votes
10answers
7k views

Forward port to another Ip/port

I recently found out that my ISP disables port 135. I have a server and personal computer behind my router. A friend and I are working on a programming project and are running into some sql issues ...