0
votes
1answer
75 views

Can't establish a reliable VPN tunnel (ShrewSoft client / ZyWALL USG-50 firewall)

I try to setup an IPSec VPN tunnel through my firewall (ZyWall USG-50), but it doesn't work like it should. quick scheme of my installation: ME [A.B.C.D] --- **INTERNET** | ...
1
vote
0answers
33 views

Setting up a web server behind a ZTE NAT [closed]

down vote favorite I have developed a web app in Java using netbeans and running on a glassfish server attached to netbeans. I would like to show this to some people but I can't get it running across ...
0
votes
1answer
127 views

access same subnet on different interfaces

I have a router with external (WAN connection) subnet 192.168.1.0/24 and also on same router a tunnel to a remote location which have the exact same subnet (192.168.1.0/24), and i need from my LAN to ...
0
votes
0answers
34 views

Cisco IOS log packets dropped due to no NAT entries?

I use access list logging currently, and update the access list to match the NAT table, and then the access-list deny any any log command is used for logging packets that were not allowed. However, I ...
1
vote
2answers
137 views

Router/Gateway with host-header capability

Can anyone direct me what to look for to get a Router / Gateway / Firewall for my home-office enviroment to be able to run multiple e.g. Webserver on port 80, with one public ip. I know it can be done ...
0
votes
1answer
136 views

ADSL Router - Access External IP internally

I have a problem when I'm doing an access using my DNS hosted at another server, which performs a redirect to my internal network. example: User attempting access to internal DNS: intranet.site.com: ...
2
votes
4answers
534 views

Linux - two subnets, one interface, one gateway - NAT the additional subnet

We currently have a few servers that all use the same LAN: Host1: eth0 10.0.0.1/24 Host2: eth0 10.0.0.2/24 Host3: eth0 10.0.0.3/24 Gateway: 10.0.0.254 We want to run some VMs (VirtualBox) on these ...
5
votes
1answer
111 views

Route traffic directly between nodes in a cluster

I apologize if this is a really dumb question. Objective Ensure that traffic that is meant to go between nodes in a cluster does not (inefficiently) go outside the cluster and then come back in, but ...
0
votes
2answers
614 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 ...
1
vote
2answers
252 views

VoIP client permamently losing connection after ISP IP reset

I have a SIP client device connected to my ADSL router, so it is behind a symmetric NAT. My ISP resets the client's IP every 24 hours, it looks like this in the router log: Mar 26 12:36:56 daemon ...
0
votes
1answer
75 views

Restricted cone NAT

If two hosts X and Y are connected to the Internet with NAT. Both NATs are of cone-restricted type. Now assume there's a server Z which stores all translated public addresses of X and Y. Both X and Y ...
0
votes
1answer
88 views

NAT/PAT port and address selection

I am currently having some issues with TCP port reused too often (under 2 minutes) for a source NAT and I was wandering what is the algorithm used to select the IP and port for a SNAT. Here is some ...
0
votes
1answer
517 views

Port forwarding behaves differently from virtual server in D-Link router?

There are two pages in D-Link router to setup access to internal network from outside: Port Forwarding and Virtual Server. Both allows to map external port to internal one, except latter page also ...
0
votes
1answer
384 views

IPv6 configuration for my private network when prefix delegation is not supported by the provider?

I have a typical router with IPv4 and NAT setup. My provider sends an IPv6 address to the router, but it does not support the IPv6 prefix delegation. How can I get IPv6 addresses for my private ...
2
votes
1answer
320 views

Building a router / NAT and need to compare performance of FreeBSD 8 v RHEL 6 [closed]

I am going to be setting up a router and NAT device but I am unable to choose between pfSense 2.x (FreeBSD 8) and RHEL 6. The device will need to forward a medium (2k hosts) sized network where ...
0
votes
1answer
2k views

How to assign a public IP to a server behind a Mikrotik rb1200, without NAT?

I have a fiber connection with 5 public ips. The ips are like this: 200.195.169.xxx/29 The Internet Link is connected to ether2. One of the public ips is used to the LAN. ...
0
votes
1answer
175 views

NAT Virtual Host setting in router not working

been working on this for past 1 week now, no break. So I have this local network with IP range 192.168.1.1 to 192.168.1.255 I have a apache server running on 192.168.1.90 on port 80 So I set up a ...
1
vote
0answers
261 views

NAT loopback/reflection on Zyxel P-661HW-D1 doesn't work

I have a Zyxel P-661HW-D1 modem/router with several port forwards that works on the WAN interface. I'd like to make them work for the LAN interface as well, like I'm used to. I updated the firmware to ...
-1
votes
1answer
190 views

any consumer router supports change source and destination IP at the same time?

For the purposes of PCI-DSS compliance, I have been asked to see if there's a small consumer router/etc that can accept a packet from one network segment, and change the destination IP address (from ...
1
vote
3answers
255 views

NAT: If two hosts initiate a connection to the same IP:PORT, with the same source PORT, how does the router handle it?

I was just thinking and that idea came to my mind. Let say I have hosts A and B inside my local area network. I have a Router, and a host C in the internet. I know that when initiating the ...
1
vote
1answer
222 views

NAT and ISP Subnet when load balancing on pfsense?

I have a pfsense box that I'm trying to plan the configuration for. I am going to be load balancing two ISP's, each with their own /29 static IP subnet. The question I have is in relation to the way ...
0
votes
2answers
177 views

Do I need to enable firewall before Natting? [closed]

I want to make my local server visible over the internet. I've learnt that I'll be able to achieve this through NAT. I'm using a D-Link router, DIR-600. In the application rules it asks me for ...
1
vote
0answers
494 views

Cisco 1841 - Configuration Issue with NAT

We recently dug out an old Cisco 1841 to solve a need and have been in the process of trying to configure it appropriately. Admittedly, this is my first escapade into the land of Cisco Routing. I've ...
3
votes
3answers
435 views

How can private IPV4 addresses get past iptables NAT (tcp RST,FIN)

I've got a router performing simple NAT translation using iptables iptables -t nat -o -j MASQUERADE This works fine almost all of the time except for one particular case where some TCP RST and FIN ...
0
votes
1answer
162 views

Can NAT port change dynamically in an active session?

I am facing an issue, having client server application where client application is sending UDP data frequently to server and server redirecting back to the client. But in a few cases I am not getting ...
0
votes
2answers
524 views

SSH not working through Double NAT

I am trying to setup port forwarding for ssh through 2 NATs The first Router translates my internet IP to my outer network (10.1.7.0). In the outer network there's a second Router that does NAT to my ...
-2
votes
3answers
614 views

Apache can't get viewed from outside of my LAN

I fixed it in PORTS TRIGGER menu of my router. Thanks you anyway I have a weird problem related with (i think) my cable-router and my configured vhosts in Apache2. The point is I can't access from ...
3
votes
2answers
641 views

Why is nat required when proxy is enough? [closed]

My machine is connected in a local lan. to connect to the internet the traffic goes through proxy server. my understanding of proxy server is that it sends the request on behalf of the original ...
-1
votes
2answers
2k views

Destination NAT Onto the Same Network from internal clients

I have a DSL router which acts as NAT (SNAT & DNAT). I have setup a server on internal network (10.0.0.2 at port 43201). DSL router was configured to "port forward" (or DNAT) all incoming ...
0
votes
1answer
181 views

Spoofing Packets?

I host a GameServer and some stupid guy just keeps attacking my Application server with random queries. I have found a solution to block it but he uses different kinds of queries so I have to block ...
-2
votes
3answers
1k views

Packets dropped due to NAT? Firewall? Unroutable private IP addresses?

Preliminary note This question is out of academic interest. I know how to work around the limitation. I use this setup to control access from one subnet to the other on IP level which works great so I ...
0
votes
1answer
334 views

How are NAT rules processed in Vyatta?

I am setting up a Vyatta router to replace my pfSense box that died. As I setting up the NAT rules I am not sure how they are processed. Are Vyatta's NAT rules processed in the order of the list ...
-1
votes
1answer
387 views

NAT UDP Hole punching beginner's basic Qn

Is there any simple example of UDP-NAT hole punching, capable of hole punching for 2 peers communication via internet? I am trying to do UDP hole punching so that it would be possible to NAT ...
1
vote
1answer
160 views

How to - UDP NAT traversal using BSD sockets

I have been reading the NAT traversal requiring the use of an external STUN server. There are few public STUN servers but I do not know how to use them to find out my public IP that can be used by the ...
0
votes
1answer
593 views

With a Cisco RV082 router, can I forward to a specific port?

I have Cisco RV082 8-port 10/100 VPN Router - Dual WAN. Can I make it forward to a specific port? I can't find Port Redirection in the config.
1
vote
2answers
4k views

Configure Mac OS X Server as Router?

I'm trying to configure a Mac OS X box with two NICs as a router complete with DHCP and NAT which in theory shouldn't be too much of a challenge but at the moment I'm learning theory and reality are ...
1
vote
1answer
681 views

How to configure public IP behind a modem/router (Actiontec GT724R)

I want to figureout how to use a public IP address (ISP provided) behind the modem/router. I'm replacing an aging modem with a NEW one, which is an actiontec GT724R modem. Its manual is Here This ...
0
votes
1answer
2k views

Cisco 1841 router: NAT overload appears to not be working - config problem or host network problem?

I've got a Cisco 1841 router. I've been trying to configure NAT overload on it, such that its subnet can access the internet. By the looks of things, I've configured everything right. I'm not sure, ...
2
votes
2answers
595 views

Assigning many WAN IPs to a Linux Router for 1:1 NAT?

I'm in the process of setting up an Ubuntu Linux box to act as a router. Its a fairly normal setup with NATing using IPTables - and its working fine for me. I'm about to put this into production, and ...
1
vote
2answers
4k views

Configure Cisco router overload NAT (IOS 15)

I am attempting to configure a Cisco 2901 router using IOS 15 to properly perform NAT/PAT translation between LAN and the internet connection. I've configured DHCP pool for the local interface, which ...
1
vote
3answers
84 views

Suggestions on routers that would meet my requirements?

From my ISP I am getting one RJ45 Port from the Modem. One IP adress is advertised by DHCP, but beside that I have an IP range I need to use for servers. On the primary IP adress that is advertised ...
0
votes
1answer
2k views

Cisco Router - NAT in and out on the same interface

Here's the situation: I have a couple of clients connected to a switch and the switch is connected to a Cisco 2621. The clients all have IP addresses in the range 192.168.1.0/24 and the router ...
0
votes
3answers
275 views

Port forwarding stopped working (apart from to one server)

I'm pretty stumped with this, I've been messing around with it for hours with no joy - I know it'll be something stupid I've missed. At our old office we have a Netgear DG834PN router which has ...
0
votes
2answers
260 views

Browser fails to load some websites with Static IP internet connection

We are using static IP internet connection and we have connected 4 computers with single internet connection using NAT/Router device. The problem is that when we try to load some websites, e.g. AWS, ...
0
votes
2answers
89 views

How router works in office [closed]

my office has few machine and one router and internet connection. when i open my browser and write url like yahoo.com then response come to me. so i dont have knowledge how router in my office deliver ...
0
votes
1answer
94 views

program requires local IP address on a globally addressed server

I'm moving a program from a local server to a remote virtual private server. Our local server has a local IP address on our LAN of 10.x.y.z. Our router allows HTTP traffic to be forwarded to that ...
0
votes
1answer
624 views

Mac Mini server (10.6) behind router with FQDN hostname

I have a Mac Mini running Mac OS 10.6.6 Server that will be part of a local network, and a static IP from my ISP. I'd like to set up DNS for the Mini with a FQDN as the hostname (example.com) ...
1
vote
2answers
1k views

NAT and two bridges

I have a Debian Squeeze server (as router and host for virtual servers) with two network cards - eth0 for internet, eth1 for local network. I installed KVM, so I created br0 (eth0, vnet0) and br1 ...
3
votes
3answers
535 views

how to connect 2 independent computer networks?

I have 2 independent networks that are connected to internet. Each systems in a network can connect to the internet through the corresponding router/NAT device. i wish to connect these two LANs. I ...
2
votes
2answers
690 views

Public IP behind NAT firewall

I have a Linux NAT Firewall serving a virtual machine infrastructure. Right now all the VMs use NAT, but I'd like to have some of them to use a public IP that is not NATed. I have a range of IPs: ...