the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.

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4
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1answer
221 views

Multi homed firewall with ipnat

i am trying (without success) to configure a ipnat/ipf box under FreeBSD 8.2, here is the scenario: outside inside +----+ ADSL ...
3
votes
1answer
25 views

Prevent Windows Server 2012 from using DHCP-provided default gateway?

How can I prevent Windows Server 2012's local network connection from using the default gateway provided by a DHCP server? I do not control the DHCP server so the solution must be implemented on the ...
3
votes
1answer
239 views

Windows server 2012 ignores static routing

BIG UPDATE: I was blind I see now that route 172.17.50.1 has netmask 255.255.255.255 and so it point to single host! But now I cannot understand how can I ping 172.17.50.10 because there is not route ...
3
votes
1answer
223 views

Packets not entering FORWARD chain

first of all, this is not an every-day routing issue. The setup is fairly complex, so let me state it before. I got a router with, lets keep it simple, 3 interfaces. eth0, eth1, eth2. eth2 is used ...
3
votes
1answer
1k views

Windows Server 2008 R2 RAS VPN: access server on internal interface ip

short question: I'm usually a linux admin but need to setup a Win2k8 R2 server for a student project. The server is running as VM on a root server and has a public internet IP assigned. Additionally I ...
2
votes
1answer
91 views

How access remote network with OpenVPN?

I am currently trying to configure OpenVPN to access our company network remotely. I was able to establish a connection and ping the server at the configured address (10.8.0.1), but I was not able to ...
2
votes
1answer
323 views

blocked.domain.gstatic.com - Where could this blocking be?

As of this morning we were having serious issues (partially loaded site with no functionality) accessing Google Drive which we use heavily. Other websites seemed to work fine. This is happening on ALL ...
2
votes
1answer
3k views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
2
votes
1answer
2k views

Strongswan VPN Established but no Packets Routed

I'm setting up a VPN using strongSwan between a Linux instance on an Amazon EC2 instance and a remote network via its Cisco concentrator. I need to route packets from the Linux instance itself a ...
2
votes
1answer
2k views

Fortigate VPN Routing issue

I have 200B Fortigate unit with 2 internet WAN connections. I also have a remote site which I'm connected to via IPSEC VPN through WAN1. This site has only one GW IP address. I'd also like to setup a ...
2
votes
1answer
333 views

route http and ssh traffic normally, everything else via vpn tunnel

I've read quite a bit and am close, I feel, and I'm pulling my hair out ... please help! I have an OpenVPN cliend whose server sets local routes and also changes the default gw (I know I can prevent ...
2
votes
1answer
247 views

Linux bridge static IP using only one NIC

It seems like I have a generic problem, but can't find any solution - every solution that I found so far on internets doesn't work for me. Let me first try to explain what I am trying to do - I have a ...
2
votes
1answer
3k views

Routing between two routers with static routes

I have a Draytek 3200 router and a pfsense rackmount router that I am trying to get to route to each other. I have a subnet on each router and a subnet for the link between, as shown here: As it ...
2
votes
1answer
371 views

Redirect SSH traffic through GRE tunnel

I'm trying to redirect all local connections with destination matchs port 22 to specified tunnel using iptables MARK, but, something is going wrong. 1.1.1.1 my public address 2.2.2.2 tunnel public ...
2
votes
1answer
1k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
2
votes
1answer
608 views

Packets marked INVALID in FORWARD rule

I have a firewall that has 3 IP aliases on 1 physical interface. Packets get dropped between these 3 interfaces (either ICMP, HTTP, or anything else). We tracked it down to these packets being marked ...
1
vote
1answer
117 views

Redirect all traffic from multiple interfaces to single IP

I would like to redirect all traffic (specifically TCP & UDP) from multiple WAN interfaces (ppp0, ppp1, ppp2) to a single IP from eth0. When it comes to interface to IP, I can use the PREROUTING ...
1
vote
1answer
65 views

Routing Help Needed - Site to Site VPN

I have successfully established an IPsec Site-to-Site VPN tunnel between our On-Prem network (Gateway, Cisco RV220W) and Azure. However I am hitting a knowledge gap with regards to setting up the ...
1
vote
1answer
43 views

Two openvpn servers on the same machine, route traffic between the two subnets

I have two openvpn servers ( one on tcp, one on udp) running on the same machine - an OPENVZ vps. The first network A uses 10.10.0.0/24 and it is designed as an intranet. The second network B uses ...
1
vote
1answer
42 views

Redirect packet that matches a pattern?

How can I route an incoming udp packet with iptables that matches a pattern like: 53 41 4D 50 5B 79 95 DB 61 1E 69 from public interface (vmbr0) and port 7777 to 192.168.0.1:7777?
1
vote
1answer
64 views

VM with 2 network cards

I have a VM with 2 network interfaces which is running CentOS. One connects to a private network (192.168.6.x) and another to our company wide network. When I try to ssh the private address from a ...
1
vote
1answer
123 views

Port based routing on ubuntu

My situation: A ubuntu server is part of a LAN with 2 gateways. The one offers high speed with high latency. The other low speed with low latency. My server usually uses GW1 for all traffic (because ...
1
vote
1answer
271 views

OpenVPN - VM-Setup with MacVTap, ICMP echo works, TCP/UPD don't

Short résumé No errors, no dropped packets, pings reach clients, tcpdump shows packages travelling, everything else never reaches the LAN hosts (or OpenVPN clients). Edit After trying to eliminate ...
1
vote
1answer
57 views

Understanding VPN Implementation

The above image shows what I think occurs during an OpenVPN connection. Hosts A and B are connected to the VPN through the VPN server at 1.2.3.4:1194. My question is: if host A wishes to send a ...
1
vote
1answer
277 views

IPv6 Routing / Subnetting

Recently I have installed Citrix Xen Server 6.2 on a machine. My Provider (Hetzner) gave me the IPv6 Subnet 2a01:4f8:200:xxxx::/64. Followed an article in the providers wiki (1) i got it working and ...
1
vote
1answer
298 views

OpenBSD: Gateway outside subnet (works in Linux)

We need to set up an OpenBSD host to use a default gateway that's outside of it's subnet. This is all I need to do on Linux (not the actual IPs) to achieve it: ifconfig eth0 33.33.33.33/31 up route ...
1
vote
1answer
121 views

dhclient asking for new routing every 1500 seconds, removing my static routing, cron not working

I have a problem with cron job on my ubuntu server 12.04. I have two internet providers - one for fast speed, second - for local resources. So, I'm using command route to up the static routing for ...
1
vote
1answer
286 views

Native IPv6: routing between eth0 and eth1

I humbly ask for your assistance with the problem I can't resolve myself. I have a native IPv6 link with 2001:db8:14::/48 assigned. I'm running Slackware on 3.2.50-grsec kernel. My ISP's side (my ...
1
vote
1answer
107 views

Bridged network setup with gateway not in netmask

i'm currently stuck at setting up the bridged networking on a dedicated server to allow the KVM-guests to use ips from an extra subnet. As far as i know, the address, broadcast and gateway must always ...
1
vote
1answer
196 views

SUSE YaST routes not in kernel route -n

I'm using opensSuSE as a router. eth0 is the WAN nic, eth1 is the LAN nic. I also have a tun10 device, which I'm using with an OpenVPN client connection. I want yast routes to specify what traffic ...
1
vote
1answer
278 views

iptables: Allowing only established outgoing connections like DMZ

I want to simulate a DMZ like scenario where server1(inside DMZ, 10.1.1.0) should be able to respond to any incoming connection and cann't make a new outgoing connection on its own. I would ...
1
vote
1answer
140 views

Ubuntu Second Wan Interface Card

I configured 3 network card. one of them is LAN card and others are Wan network card. eth0 Link encap:Ethernet HWaddr 00:50:56:00:30:da inet addr:5.x.x.1 Bcast:5.x.x.3 ...
0
votes
0answers
65 views

tunnel two windows or linux server with routing packets

I would like to use IPIP eoip tunnel for windows/linux. In addition, It's not necessary to be IPIP, I want to route connection from server 1 to server 2. You can see following flowchart: ...
0
votes
0answers
141 views

Open port and route incoming traffic back to the connected client - OpenVPN

I did my own VPN setup on a CentOS box and it's working very nice and smooth. However I would like to add a feature that I open a specified port on the box for the incoming traffic that should be ...
0
votes
0answers
117 views

Why NATted packets have different source ip addresses?

I've got ubuntu box with nat. Here is the problem: root@office.redhelper.ru:~# tcpdump -i tap0 host 194.190.8.141 -n tcpdump: verbose output suppressed, use -v or -vv for full protocol decode ...
0
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0answers
81 views

virtual NIC, local routing and linux kernel routing table

from this article: http://backreference.org/2010/03/26/tuntap-interface-tutorial/ the author created a tun interface # openvpn --mktun --dev tun2 # ip link set tun2 up # ip addr add 10.0.0.1/24 dev ...
0
votes
0answers
546 views

How to enable multicast routing in TMG 2010?

I have a TMG 2010 firewall between some office networks, which handles routing and firewalling; I need to let some application-specific multicast traffic flow between these networks; this is UDP ...
0
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0answers
401 views

Routing issue with KVM: Gateway on different Subnet than VM

I have Server at hetzner.de, with a /29 subnet for running KVM-VMs. The VMs get network access via a bridge interface. I'm currently using two IPs from the subnet. The VM-host is running Ubuntu 12.04 ...
0
votes
0answers
52 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
0answers
104 views

ASA 5505 Dedicate WAN Route to Voice Vlan

I've Got multiple WAN connections currently and I plan on moving towards a Active/standby Configuration in the near future, I have two asa 5505's with SecPlus licenses, the device is currently ...
0
votes
0answers
65 views

usage of RIP in production networks (routing protocol)

Based on the Cisco textbooks, link-state routing protocols (e.g. OSPF) are preffered over distance-vector protocols (e.g. RIP) and the reasons cited are typically convergence time and loop prevention. ...
0
votes
0answers
138 views

Is it possible to set up a management VLAN on HP switches without configuring routes on the WAN routers?

The network I help manage/maintain is configured like so: Location A - 10.0.0.0/22<br /> Location B - 10.0.4.0/22<br /> Location C - 10.0.8.0/22<br /> etc. Our ISP owns and ...
0
votes
0answers
730 views

RRAS PPTP VPN Connected but not get ping my local LAN

Two days back i had configure RRAS VPN server on Windows server 2008 Std R2 with two (LAN (192.168.100.173 with 255.255.255.0 subnet, without gateway,no DNS -- only ip Address was there) / WAN ...
0
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0answers
72 views

DNS Routing Issue on Our Wireless Router

We have a domain we are hosting internally. We then have a Guest Wireless Belkin Router setup to allow traffic off of our network. The Guest_Wireless Router is setup in front of our firewalls, not ...
0
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0answers
23 views

Intermittent Server Response Failure - Not Software Related - How to find source of failure?

Symptoms: No response to HTTP, FTP, SSH. Usually the problem "resolves" itself within a minute or two of my first attempt to connect, and I can then connect by any method. Symptoms come up suddenly, ...
0
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0answers
495 views

Policy-based routing with openvpn

I just want to check with you if the config i have made is correct. I have my goflex with archlinux installed on it. The NAS is connected to the router (router IP is 192.168.100.1)- the NAS IP is ...
0
votes
0answers
278 views

Ubuntu 12.04 routing with 172.16.0. addresses

Having a issue very similar to linux routing bug? I have a ubuntu 12.04 system(kernel 3.10) with ifconfig as eth0 Link encap:Ethernet HWaddr 40:61:86:c9:a2:5f inet ...
0
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0answers
827 views

Windows 7 workstation can't access file shares over VPN

Windows 7 workstations that are joined to a Windows Server 2003 R2 domain are unable to access file shares after being moved to a remote location via a VPN. The workstations were previously on the ...
-1
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0answers
13 views

Route port forward through 2 windows server 2008R2 network adapters to another network

our phone system at work is on a separate network to everything else and I need to forward a port from our gateway to it to allow our phone tech to remotely administer it. I have plugged the phone ...
-1
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0answers
40 views

Access Local LAN machines of Open VPN server from remote VPN clients

I am setting up a Open VPN server on one of the Windows 2008 machines of the local (LAN 192.168.10.0) with IP 192.168.10.6 The other local LAN machines are ...