In computer networking, network address translation (NAT) is the process of modifying network address information in datagram (IP) packet headers while in transit across a traffic routing device for the purpose of remapping one IP address space into another.

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sonicwall vpn and NAT

I have a site-to-site VPN set up with a vendor. Let's say the tunnel endpoints are 192.1.1.101 on my side and 192.1.2.0/24 on the vendor's side (which get's NATted to their LAN of 10.x.x.x). This is ...
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347 views

RRAS Server 2012 R2 Not Assigning Network Info or if it does not passing NAT

I wouldn't bother with this for any other reason than the fact that the speeds I get are worth it. Cable Modem (Bridge mode) - Server 2012 R2 (RRAS) - Linksys EA2700 (Bridged as Switch) My issue is ...
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2answers
459 views

Redirection with natd flags on FreeBSD

I am trying to setup a basic NAT server. I want all traffic coming from the outside world to the NAT server to be redirected to another machine, where I have a lipcap service running to parse this ...
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2answers
482 views

Linux, some packets are not being NAT

I'm trying to NAT HTTP traffic, I'm new to this and facing some issues. What I'm trying to do is NAT client HTTP requests to a webserver. CLIENT -> NAT BOX -> WEBSERVER When the client open the IP ...
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2answers
540 views

Bastion Firewall Host ipTables Redirect Question

Some background: A firewall has been constructed using RH Fedora 13, Kernel 2.6.34.7-63, and IPTables 1.4.7. The firewall is a simple, twin adapter configuration, with the external interface (eth0) ...
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2answers
391 views

Bind docker container ports only to specific outside server address

This is the first time i address such a network "problem" to solve with docker and i need some inputs. This is my situation: Ubuntu 14.04 running NginX, ufw as firewall and docker containers to ...
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2answers
716 views

DirectAccess: Client receiving icmp error from Ipv6 address

Pardon my naivety but I have never setup DirectAccess before, I've done some research prior and was unable to find a relevant resource. Let me provide a little background and then I'll jump into the ...
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2answers
809 views

SIP Trunk for VOIP behind a SonicWALL

I appreciate this question is quite "out-there" but - has anyone had any success with VOIP over SIP behind a SonicWALL. We are having an issue with one-way audio inbound. Essentially, the person ...
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2answers
258 views

NAT-ing with iptables rewrites source IP in logs

I have the following infrastructure in place: internet [outside 81.x.x.x] router [inside 192.168.1.1] | [network 192.168.1.0/24] ...
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2answers
596 views

router: ping fails at specific time for 40 seconds

my network looks like this: ISP cable --- ISP modem/router (2 in 1) \ \--- my router --- wifi connection --- computer 1 \----------- cable connection --...
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2answers
137 views

Websever behind Sonicwall, Gateway Timeout

I am stuck here, I have a Cradlepoint CBA750B in IP-passthrough mode connected to x1 on my Sonicwall NSA220. Behind the Sonicwall I have a webserver on the LAN. I have X1 set to use DHCP to get the ...
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2answers
143 views

webserver unreachable for short periods

We have a development webserver (ubuntu) with some websites running on it. Most of the time this works fine but since some time when we are developing we get a "cannot connect" error when loading a ...
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2answers
1k views

Cisco ip nat overload algorithm

I have a cisco 7206 vxr with 15.0 ios(c7200p-adventerprisek9-mz.151-3.S0a.bin) .I configured the overloaded nat there. some of confs: ip nat pool nat a.b.c.2 a.b.c.254 netmask 255.255.255.0 ip nat ...
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2answers
606 views

Problems with commands to configure the NAT on CISCO ubr7200 series

I have a Cisco uBR7200 series CMTS with these features: Cisco Internetwork Operating System Software IOS (tm) 7200 Software (uBR7200-K8P-M), Version 12.3 (9a) BC9, RELEASE SOFTWARE (fc1) Cisco ...
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2answers
44 views

Asterisk One Way Audio or No Inbound Calls

I have an Elastix server running in Amazon Web services, but I can't seem to resolve an issue that is causing either one way audio or no inbound calls to ring. If I set my SIP extensions to "Nat = ...
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2answers
41 views

Iptables NAT (PAT) A to B to C and back

I want to access via SSH a DB server from an outside network via a linux (CentOS) gateway with two interfaces in separate networks as it follow below: Admin PC IP: 10.21.1.8 Linux GW IP eth1 ...
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2answers
156 views

How can I use NAT or haproxy to reroute a certain host name?

I have an infrastructure where all requests made by internal subnets have to pass through a server in the "open to the world" subnet, where my NAT instance is (I'm using AWS). I want to create a host ...
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2answers
641 views

Portforwarding with IPTABLES and Remote IP detection

I was able to forward 80 port from my primary server 192.168.90.1 to the second one 192.168.90.2 with IPTABLES The primary server has a public address X.X.X.X so I forwarded X.X.X.X:80 -> 192.168....
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2answers
81 views

IIS and Apache hosting together

I know similar questions have been asked already, but mines a little more unique. I work for an internet/networking company. We build and host websites, as well as provide internet and network setups ...
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2answers
2k views

Unable to PPTP through NAT on Cisco 881

I'm trying to connect to a PPTP server which is sat behind a Cisco 881 NAT router. The server is running Ubuntu Server 12.04 and is running Poptop pptpd as the PPTP daemon listening for connections. ...
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2answers
270 views

Iptables DNAT / only one url

I have a rule similar to this: iptables -t nat -I PREROUTING -p tcp --dport 80 -s 192.168.1.5 -j DNAT --to-destination 192.168.1.2:80 which redirects all http requests from 1.5 host to 1.2.. I want ...
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2answers
325 views

webserver from local network (behind NAT)

I have a debian server (gateway, web) which is behind ISP's NAT. I need access on webserver from my local network but domain has DNS record for external IP. Can I create "fake dns" for my local ...
0
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2answers
650 views

How can I route some (but not all) web traffice over a VPN tunnel. Sonicwall appliances on each end

I have two networks: Network A Private 10.0.0.0/24 Network B Private 10.0.10.0/24 Both running Sonicwall ~200 appliances, connected by a VPN tunnel. I am able to reach specific internal address on ...
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1answer
878 views

Connecting to SQL Server Express 2008 behind a NAT

First off, apologies in advance for any misuse of networking terminology - I'm definitely not a networking guy. I'm renting an instance from Amazon's cloud and want to have it connect to my SQL ...
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1answer
364 views

PFSense new network, NAT and Firewalling

We have a PFSENSE installation with a few physical interfaces defined: 192.168.1.0/24 - LAN 192.168.2.0/24 - WIFI 192.168.3.0/24 - SERVERS 10.61.88.0/23 - New Requirement..... read on The new ...
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1answer
347 views

how to NAT site to site VPN web traffic?

I have 2 Cisco routers and they are connected via GRE over IPsec. All of the traffic from the first router is being routed to the 2nd router with a default route. I need to access internet from the ...
0
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1answer
556 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 ...
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1answer
643 views

iptables and NAT/port forwarding not working after server reboot

I'm new to NAT and iptables, I have my physical server running CentOS 6 with KVM installed, 2 more linux box is started as VM - VM2 and VM3, and their ip is 192.168.122.2 and 192.168.122.3 accordingly....
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1answer
278 views

Connect networks with identical IPs via iptables+NAT: selecting outgoing network interface

I want to allow connectivity between two hosts which reside on two different networks. Each network is individually managed, so they may have conflicting IPs. My understanding is that NAT is the ...
0
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1answer
447 views

Cisco routers “loopback”

I have Cisco RV220W. I have configured with NAT, and its working good from outside. (From WAN) But when I is on LAN-side, and visit my ip-address, for instance http://83.213.21.32:80 I am beeing ...
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1answer
669 views

How to NAT a 192.168.x.x corporate domain on a Cisco ASA to not conlict with VPN remote users LANs

I'd successfully configured an IPSEC VPN as per this question:- How to disable dns doctoring for IPSEC VPN connections for ASA 5510 However I ran into the problem that remote users are often on a ...
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1answer
104 views

How do I prevent natd from accessing a specific external address?

I'm using Little Snitch, and it's telling me natd is accessing tonix.sytes.net (a torrent tracker) every second or so. I have been unable to backtrace which program is making the call, and if I "block"...
0
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1answer
57 views

Mail not sending on Server 2008 using NAT between 2 NIC's

I recently moved from a svr2003 domain to a new 2008 domain. The setup I had below allowed internet and also smtp configured in outlook to go via 192.168.1.1 nic 1 192.168.1 - wan sn 255.255.255.0 ...
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1answer
222 views

CISCO PAT 2 different outside ports, on one ip-address, to 1 inside port on one ip-address

I have a problem with our new corporate CISCO ASA5510 firewall. With our old firewall it was possible to do the following PAT: outside -> inside 1.1.1.1:22 -> 192.168.1.2:22 1.1.1.1:443 -> 192....
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1answer
289 views

Trigger iptables masquerade before reaching service on gateway?

I have a STUN service running on the same machine that is the gateway for the LAN, I would like the results from the STUN service be the same for both internal and external machines. Currently since ...
0
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1answer
504 views

RDP to Windows XP guest on kvm constantly reconnecting after logon

ISSUE I have, after some days of "hard" work, managed to correctly configure kvm on a Centos 5.5 host. I have 2 VM running successfully. Since I only have one public IP address (for the kvm host) I ...
0
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1answer
469 views

After NAT how to setup VPN in windows server 2008 r2?

We have one windows server 2008 R2 with about 10 Hyper-V virtual machines. We've used wizard that comes when you enable RRAS to setup NAT, so that virtual machines can connect to internet (and to ...
0
votes
1answer
445 views

How do I fix Hyper-V Guest OS connectivity problems through RRAS/NAT?

I have a Hyper-V host machine with NAT set up for my guest virtual machine. At a client site, the host connects to a wireless network through a cert (and then there's a proxy to access the extranet). ...
0
votes
1answer
173 views

Using twice NATTing and dns_Alg

I am trying to use twice nat along with dns_alg to support a framework, and take its measurements. I have a private network 192.168.0.0/24 this network contains www,dns,dhcp etc for its own use.DNS,...
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1answer
111 views

Restrict NAT in IOS to only one public IP

I've managed to enable port-forwarding on my Cisco 877 but I wasn't able to find a way to specify a single accepted IP from the outside. Any link to a Cisco documentation or commands to type in IOS ...
0
votes
1answer
121 views

Routing + NAT for two laptops

I have two PC's (two laptops). In one of them (on the laptop) installed Linux Mint 9. It has two interfaces (WAN via Cable and LAN via Wi-fi). I want to configure routing in it to provide access to ...
0
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1answer
243 views

How to connect to Wi-Fi device through another machine available through VPN?

We are developing app for device named iTach WF2IR, but we doesn't actually have that device, we will get one in 4 weeks or so. Meanwhile, we should make demo for that device in a week. So we decided ...
0
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1answer
854 views

ipnat.conf - map and rdr won't work!

I can't put my mind around it, before reboot I was able to ssh in from outside to my jail and right now I can't! I even rebuild the whole system and even that didn't help:( anyone have any ideas? su-...
0
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1answer
307 views

Connections fail routinely from the internet to a ADSL router doing NAT

I have a Comtrend ADSL router that routinely fails to sustain connections via NAT (I try HTTP and SSH) to a machine in its internal network. I can connect for, say, half an hour and then the ...
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1answer
29 views

Need help configuring NAT

First of all, the router I am using is a Cisco WRVS4400N. My company runs a software which handles the MySQL database of all of their products. The software now has an e-commerce module, so I have ...
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1answer
128 views

can anyone show me how can i fix error with my NAT config

Can anyone help me with my packet tracer problem? My network 2 buildings (each building has 3 vlans) on the same side and it has 2 sides, between is internet. I finish with DHCP and now I try to ...
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1answer
397 views

iptables NAT Forward 443 Port DNAT,SNAT failing

I'm trying to setup a proxy server that handles http and forwards https to the webserver. Client > Proxy > httpd I added the rules: iptables -t nat -I PREROUTING -i eth1 -p tcp -m tcp --dport ...
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1answer
4k views

Pfsense Virtual IP NATing

Am setting up Pfsense 2.0 but am stuck when it comes to port forwarding/Natting. I've done it before but not using Virtual IPs. Say I have WAN on 11.11.11.1 and LAN on 192.168.5.5, I have added a ...
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1answer
139 views

Multiple External IP's

I have a Virtual host server that has 6 VM's on it running a Windows SErver 200i8 r2 enviroment. I have two domains externally one of which points to my static IP. How do i use my other static IP's ...
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1answer
32 views

Mirotik : Client from interface 1 cant access client from interface 2

I have a mikrotik here. Both interface 1 and 2 have same network (10.10.30.0) and dhcp pool. I can ping any client on interface 1 from mikrotik and also any client on interface 2. But I cant use to ...