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0
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2answers
895 views

Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports

Following a gateway / firewall system's hardware failure, a younger version of Fedora Core (17) was installed on new hardware, and the old 'iptables' and system-config-firewall files from /etc/...
0
votes
1answer
67 views

define a specific mail-relay for a specif group in Exchange

So, my question is, how do I define a specific mail-relay for a specif group in Exchange. Lets say I have an exchange server (2010) in IP 10.0.0.1, the default mail gate-way is 10.0.0.2, now, I have ...
1
vote
1answer
2k views

Linux implementation of TS gateway

I was wondering if there is a linux implementation of a TS Gateway, like the one present in Windows Server 2008. My scenario, I have a Windows remote desktop client behind a Linux Gateway at home, ...
0
votes
1answer
562 views

how to find default gateway on virtuozzo VPS?

trying to install tinc on VPS but config need Subnet which is modem IP i think as they entered 10.0.0.1/32 on demo. but on my vps ping of either 10.0.0.1/32 or 192.168.1.1 don't replay. if i put 127....
-1
votes
2answers
479 views

Client Login before accessing the internet [closed]

I wanted to create an internet gateway server where the client connecting to my network must enter a username and password, where the server checks if username and password is correct before they can ...
3
votes
1answer
943 views

NAT with multiple gateways

I have the following setup: My Lan is 10.56.8.0/23 I have a gateway with internet access(INETIP-A) and the LAN IP 10.56.9.1 I have another gateway with internet access(INETIP-B) and the LAN IP 10.56....
0
votes
2answers
114 views

postfix email gateway

I am setting up a postfix email gateway. It will not hold any mail but will accept email for my domain and forward it to another internal mailserver and relay mail out from the internal server. One ...
1
vote
2answers
1k views

If I have computers linked through a switch, will they communicate directly? [closed]

If I have a network like: Group1 -> Switch -> Switch -> Server (configured as gateway by DHCP) Group2 -> Switch -----^ (Hope that makes sense...) When computers in each group send ...
4
votes
1answer
546 views

ping request not forwarded in one direction

Edit: I solved my issue just as I was finishing this insanely long post. I had simply not enable ping reply in my windows firewall which is why I could not ping a computer on network 0 from network 1 ...
2
votes
1answer
832 views

Ubuntu 12.04 Transparent proxy gateway

i have a ubuntu server which i want to use as a transparent proxy, (i have no issue setting up squid, just the iptables. The server only has one network interface. The server sits on the same subnet ...
0
votes
1answer
203 views

Multiple Routers, Failover, DHCP and multiple gateways. NOT WAN-failover

I've had a look around google and this forum but could not find an answer to my question. So probably one of you can help me a little. My intended setup is: Router R1: wan connection to isp. ...
1
vote
2answers
338 views

VLAN Creation no Internet Access

I have a dell switch 6200. I am trying to add a new VLAN to the current VLANs. I currently have a VLAN that is 192.168.01 255.255.255.0. The default Gateway is 192.168.0.1. I created a VLAN 192.168....
1
vote
1answer
548 views

Route Traffic Through Linux Server With Two Devices

Here is my current setup (all servers are Ubuntu Server Edition 12.04): Server 0 has two devices, eth0 and eth1. eth0 is connected to the wall (the internet), and eth1 is connected to a switch. ...
0
votes
2answers
186 views

connecting to server with multiple nics in other vlan

I'm sorry to be unclear... I will try to rephrase the problem. I work in a school as IT-administrator and I'm not a specialist, but try to make the best out of it. I hope you guys have a little ...
-1
votes
1answer
101 views

Cannot connect to external 192.168 address [closed]

I am connected via VPN to another network which uses IP addresses in the range 192.168.x.x. I have changed my home network to not use that network (I use 10.10.x.x). However, I cannot seem to access ...
1
vote
2answers
137 views

Chain Gateways on the LAN

I installed m0n0wall in a virtualized environment, i have 10 PCs connected to a router ( 192.168.1.0/24) which connect them to the internet through PPPoE, the problem is that this router does not have ...
3
votes
2answers
239 views

Preventing endless forwarding with two routers

The network in quesiton looks basically like this: /----Inet1 / H1---[111.0/24]---GW1---[99.0/24] \----GW2-----Inet2 Device ...
0
votes
1answer
2k views

Ping reply not getting to LAN machines but getting in Linux router Gateway

I have configured Ubuntu 12.04 as Gateway machine.its having two interfaces eth0 with ip 192.168.122.39(Static) and eth1 connected to modem with ip address 192.168.2.3(through DHCP). ip-...
1
vote
0answers
445 views

Clear OS Community and packet time out in client machines only

I am having Clear OS Community Edition running as router with 2 network interfaces. Interface eth0 is connected to LAN with ip 192.168.122.2 and interface eth0 with ip 192.168.2.2 is having internet ...
2
votes
2answers
5k views

How can I setup RD Gateway on the same server as TMG?

I have used the following guides with no luck: http://www.rayheffer.com/953/building-a-remote-desktop-gateway-rdg-rd-gateway-server/ http://www.isaserver.org/tutorials/Microsoft-Forefront-TMG-...
2
votes
2answers
246 views

Default route not on LAN

I have a network that in principle looks like this: H1---\ /----Inet1 H2---->---GW1---< H3---/ \----GW2-----Inet2 H1 and H2 = Hosts that need access to internet with GW1 ...
4
votes
2answers
263 views

2 nics. 2 Defaults Gateways

Here is my scenario: i have this server with 2 nics, each one with different IPs, connected to differents routers. Almost everything is configured whe way i need. Traffic coming from eth0 exits ...
0
votes
1answer
634 views

Two Cisco 2901 Back-to-Back using X.21 (HWIC-2T) - Am I missing some config?

I have two Cisco 2901 GWs, each has an HWIC-2T interface module. I want to set them up back-to-back to send network traffic between PCs and Phones connected to my GWs over this link. I have CAB-SS-...
1
vote
0answers
175 views

Configuring linux gateway to forward packets

I have a windows box with a wireless card (ip 10.10.96.22) configured with a default gateway of 10.10.96.21/24 (this is my linux laptop's wireless ip). From the Windows box I can ping my linux laptop ...
0
votes
1answer
363 views

Weird routing issue

I am working on getting networking working correctly on a cluster of 14 virtual servers at a customer site. 11 of them work fine for routing and 3 don't work correctly for their administrative ...
1
vote
2answers
746 views

Gateway redundancy on a single subnet

I'm trying to discover if there are any methods to have more than 1 default gateway (in a fail-over strategy) on a single subnet. If one gateway goes down then I would like to have servers fail-over ...
1
vote
0answers
670 views

IPcop Multiple WAN Subnets

We have an IPcop firewall and have had no issues with it. We've had a block of 10 IP addresses from our colocation provider and have been able port forward from those to internal servers as needed. We'...
4
votes
1answer
3k views

What is the purpose of netcat's “-w timeout” option when ssh tunneling?

I am in the exact same situation as the person who posted another question, I am trying to tunnel ssh connections through a gateway server instead of having to ssh into the gateway and manually ssh ...
2
votes
1answer
574 views

What causes packet loss from Debian server to nearest gateway?

I have a debian Squeeze KVM server hosted with an ISP. The server doesn't have much load (average 0.1) and has sufficient memory, low network traffic, low disk i/o etc etc. It's running standard LAMP ...
2
votes
1answer
285 views

open source solution to a gateway for a network of a housing cooperative of 150 people

i just inherited a barely functioning network for a student housing cooperative of about 150 people. in it's current state, as i understand it from the previous person in charge of the network, we ...
0
votes
1answer
1k views

Is there a free linux distribution that provides network services with an Web interface? [closed]

What I have in mind and used is a commercial gateway/firewall with an web-interface for configuration that has this specifications: Administration Network Monitoring and logging Authentication ...
0
votes
2answers
8k views

arp -n responds with (incomplete) on the wrong subnet, can't remove it

context There are 2 servers: server1 - eth0 10.129.76.16 eth0.2 192.168.0.103 server2 - eth0 10.129.79.1 eth0.2 192.168.62.101 The 192.x.x.x addresses are connected to the ...
0
votes
1answer
184 views

Protect software default gateway from ip-stealing

We have a corporate network that is comprised of the following elements: Internet cable (wall) <-> (ext interface (DHCP))(Windows Server 2008, TMG-enabled, Internet Gateway)(int interface (static ...
2
votes
1answer
571 views

I need to change the external IP address based on source IP address

I'm running an iptables firewall with 5 aliased ip addresses (actual ip 10.64.18.1). This machine is also my gateway out for all internal machines (192.168.18.*). My problem is, when 192.168.18.65 ...
2
votes
1answer
1k views

What is the right place for default gateway in CentOS/RHEL?

As I can see there are 2 places where GATEWAY option could be used in CentOS: /etc/sysconfig/network /etc/sysconfig/network-scripts/ifcfg-* What is the right place for default gateway and what ...
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votes
2answers
71 views

How do i create a 'layer' in between my router and a user connecting to it [closed]

Like when you go to starbucks the first thing you see if you go to their wifi is "Welcome to starbucks, please accept our terms". Or also at most airports, it makes it impossible to surf until you ...
1
vote
2answers
1k views

Linux (Ubuntu 12.04) two gateways one nic

I have Ubuntu 12.04 Server edition Two gateways, both on 192.168.0. network, let's make them 192.168.0.1 and 192.168.0.2 I've read you should be able to add second gateway into /etc/network/...
5
votes
2answers
7k views

OpenVPN connection works but no gateway is assigned

i try to setup openvpn on a vps and I'm able to establish a connection to the server, but the gateway isn't assigned to the client. Here are my config files: client config: client dev tun proto ...
1
vote
1answer
4k views

TMG 2010 Edge Firewall Setup - Internal subnet has no internet access

I just set up a TMG 2010 server as an edge firewall. The TMG machine has two NICs: LAN: IP-192.168.1.1, Netmask-255.255.255.0, DNS-192.168.1.3, Gateway-(blank) WAN: IP-119.x.x.98, Netmask-255.255....
0
votes
1answer
379 views

Add IPv6 support to DirectAdmin server [closed]

I just set up an new DirectAdmin, and I want to prepare it for IPv6 use. My ISP have gave me an range of IPv6 addresses that I can use. Lets say that address is 2a01:7c8:**:1f::. My neworkadapter ...
5
votes
1answer
2k views

Utilize two gateways on the same network same interface with load balancing

My setup is two ISPs on a single interface and single network. I can either set my default gateway to 192.168.0.1 or 192.168.1.250 and either work. Edit: Netmask (as noticed in the comment) is 255....
2
votes
2answers
138 views

Calculate data transferred in a local LAN

How do you calculate the data flown between a computer and the gateway computer. I have a Linux router/gateway running IP Tables which routes internet traffic in a LAN. I have individual users with IP/...
0
votes
2answers
87 views

Machine as gateway between a router and local devices

I have a machine that I want to use as a gateway between the router. For example: Several machines on the network wants to access www.google.com lets say Send their requests to me I send them to my ...
0
votes
2answers
121 views

advice on gateway address

I am wondering if a node on a subnet should have its default gateway set to the IP of the router or should it be the IP address of the switch? In Packet Tracer, I am using the router's address as the ...
2
votes
1answer
2k views

Centos 6.2 Fresh 'Basic Server' install networking issues

I've had a /29 provisioned on a network port for a server and am trying to at least configure the machine so I can ssh into it. It's Centos 6.2 x64 with the Basic Server install. Currently not able to ...
0
votes
2answers
212 views

Routing table gateway

I have a VPS (CentOS 5.6). Here is my routing table. Kernel IP routing table Destination | Gateway | Genmask | Flags | Metric | Ref | Use Iface 192.x.x.0 | 0.0.0.0 | 255.255.255.0 | U | ...
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vote
1answer
3k views

How to change default gateway on XP VPN connection?

When I connect to an XP VPN the default gateway for the connection is the IP address of the VPN server machine. I think this is the reason I cannot connect to the internet via the VPN. How do I ...
1
vote
1answer
567 views

Network Gateway Options for Small Office: Cisco 800 series router vs. Linux/*BSD (e.g. pfSense) on a white box vs. reflashed DD-WRT/Tomato/OpenWRT

Our existing network gateway's hardware has just failed (it was a repurposed desktop machine running Debian + Shorewall that we threw together), and we're looking to replace it. For now, we've fallen ...
1
vote
1answer
2k views

pfSense - OpenVPN - tap - client connection: Default Gateway Error

We have setup a OpenVPN Server on a pfSense v2.0.1 Router with the "OpenVPN tap Bridging Fix package" to build a bridged VPN network. We followed this HOWTO: link Nearly everything workes fine expect ...
0
votes
1answer
220 views

how to get gateway address

I am trying to get gateway address but when i call "route -n" I expect to see something like that Destination Gateway Genmask Flags 0.0.0.0 dnsip 0.0.0.0 UG ...