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

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0answers
12 views

Routing in Windows 7 for 2 internet (Ethernet + VPN L2TP)

I have 2 internet connections. First one is Ethernet type. Second is VPN using L2TP. First one is 192.168.1.x network VPN is 10.52.52.x network I have 2 virtual PC: (192.168.1.2 and 192.168.1.3) I ...
3
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1answer
70 views

Massive packet duplication

Short Version: We've had a problem with a particular server receiving massive duplicates of packets. After much fault finding we found the problem was caused by a switch sending my packet out every ...
0
votes
1answer
43 views

Same routes under VPN - how to workaround?

I only have basic experience with VPNs (mostly OpenVPN) and mostly theoric, but now I want to set up something more complex and I am evaluating the possible issues that I may face. I will try to ...
0
votes
1answer
27 views

load balancing multiple connections over multiple links

As I understand it (based on the kernel docs) the setting of "arp_filter=1" necessitates the use of a source based routing policy to allow multiple interfaces to route traffic, potentially (but not ...
3
votes
2answers
100 views

How to enable traceroute in linux machine

I'm working on something in the transport layer and after i ran our custom policies for securing the policies i'm not able to do traceroute from the linux machine. root@keystone-evm:~# iptables ...
3
votes
1answer
827 views

How do I route all traffic from clients connected to the DD-WRT to its OpenVPN tunnel tun0?

I am setting a secondary (DD-WRT) router to act as a OpenVPN client so that all clients would get VPN access simply by connecting to the router. But seems clients traffic is always routed via the main ...
0
votes
1answer
25 views

sporadic routing to another website when opening a common url

I have a strange problem in our office: Sometimes when opening a url from one of our projects random url in any browser not the right website shows up but some other website. In most of the cases ...
2
votes
0answers
23 views

how can i test ICMP Re-direct message?

I want to test whether my linux machine is actually accepting ICMP re-direct message and updating the entry in routing table.This is what i have done so far to achieve the same. Simulated a ICMP ...
1
vote
1answer
752 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 ...
0
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0answers
18 views

How can I allow NAT from inside to outside and vise-versa when each of my clients will have only one static public IP using an ASA5525-X?

My network topology is pretty basic. My data center provides a router and added a switch just before my cage to provide connectivity to all of the racks. My rack takes the copper drop they provide and ...
2
votes
1answer
1k 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 ...
0
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0answers
11 views

IPv6 host route is deleted after PMTU expires

I am experimenting my new IPv6 tunnel setup between my local Ubuntu box and a scratch Linode. I set up some docker containers, configured 6in4 tunnel server and IPv6 forwarding on the Linode: # uname ...
0
votes
1answer
1k views

Allow access to printer between interfaces on Cisco ASA5510

I have a Cisco ASA5510 where we have to separate networks on two separate interfaces. The networks should have nothing to do with each other except that network B needs to access a printer on network ...
1
vote
2answers
982 views

Ubuntu Server, 2 Ethernet Devices, Same Gateway - Want to force internet traffic through 1 device (or at least allow it to work!)

I have a Ubuntu 10.04 Server with 2 ethernet devices, eth0 and eth1. eth0 has a static IP of 192.168.1.210 eth1 has a static IP if 192.168.1.211 The DHCP server (which also serves as the internet ...
2
votes
2answers
1k views

Limiting interface bandwidth with tc under Linux

I have a linux router which has a 10GBe interface on the outside and bonded Gigabit ethernet interfaces on the inside. We have currently budget for 2GBit/s. If we exceed that rate by more than 5% ...
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 ...
1
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0answers
17 views

Policy routing local user's traffic down a tunnel

I've got a Linux based Firewall/Router running iptables and SNAT for traffic passing through it to the Internet via a single uplink - This is working fine. There is also a small number of applications ...
0
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0answers
15 views

SonicWall Routing Between VLANS

We have a sonicwall NSA 3500, x4 has 2 vlan interfaces so x4:v300 and x4:v301. Each vlan has an IP v300 is 192.168.100.1 and v301 is 192.168.101.1. I then have x4 connected to a layer 2 only switch ...
0
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0answers
38 views

How can I create routes between two separate LANs on the internet over an OpenVPN tunnel?

Diagram I have separate router/OpenVPN appliances at two different sites. The appliances are actually TP Link routers running OpenWRT 12.09, r36088. I would like clients behind these two routers to ...
0
votes
1answer
914 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 ...
0
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0answers
26 views

network inbound from other subnets refused to server A, Server A can go outbound to internal networks, but not internet

I have a RHEL 6 server with 4 NICs on 192.168.2.[30-33]/24 Set with DHCP reservations via infoblox, I have checked and the MACs all match up. ifconfig shows /24 for every netmask, and the routing ...
0
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0answers
14 views

DNSMasq on DD-WRT not working as expected

Following the guide given here I created several DNSMasq options for a local network, however none of them are working as they should. I am hosting a website internally on a viertual server, however ...
5
votes
1answer
445 views

Internet routing table breaks 512,000 routes [closed]

Looks like with all the mass IP grabs as well as subletting of space, things have finally hit the 512K mark. Anyone on the raw end of an upstream router that ran out of route space? How do most ...
3
votes
1answer
761 views

iptables: access connected openvpn client from the LAN with the VPN server

I have what is essentially a routing problem, and I'm not familiar enough with routing and iptables to effectively troubleshoot and set up my network needs. What's working I have an openVPN network ...
0
votes
1answer
24 views

Cisco ASA Outside to Outside NAT (forward from one public ip to another public IP)

I have an ASA (A) with a set of public IPs (A1..A6). And I have another server S with a public IP (S1) . I want all traffic to A2:22 NATed (forwarded) to S1:22. (SSH is just an example here) If ...
1
vote
2answers
38 views

CentOS 5.4, 3 nic-s

I need your help for the following problem: I have a CentOS server with 3 nics: eth0: IP ADDRESS=192.168.4.102 /24 GW = 192.168.4.1 eth1: IP ADDRESS=192.168.2.101 /24 GW = ...
5
votes
3answers
8k views

Public static ip for vagrant box

I have server (Debian Squeeze) with 1 ethernet card and 2 public static IPs (188.120.245.4 and 188.120.244.5). What I want: Setup virtual box (Ubuntu) with access via static IP (188.120.244.5). ...
0
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0answers
24 views

Linux IPSec, association established but no traffic

We are attempting to setup an IPSec tunnel from a Debian firewall/router to a Netasq hardware firewall. On the Debian side the tools used are IPSec-tools and Racoon. The IPSec SA is established ...
0
votes
2answers
28 views

Windows 8 is not always selecting correct network card for my outgoing transmissions

The company I work for builds and sells industrial machines. One of our products is a machine which is controlled by a PC running Windows. This particular machine uses a networked device with ...
0
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0answers
27 views

Routing traffic from LAN over VPN link out to 'net; works from router, not from LAN. What route is missing?

I have 3 machines. 2, routers, are connected over a VPN. The 3rd is a PC on the lan behind one of the routers. internet | | ROUTER S1 external: YYY.56.52.56 ...
5
votes
4answers
1k views

Openvpn, forward packets very slowly

I rebooted my server, and an odd issue just came out. I am running on ArchLinux, the clients are Ubuntu, Android and Mac. The problem is that accessing the internet via the clients is slow, about ...
2
votes
1answer
54 views

Windows ignores which interface to use in routing table

Hi i'm running windows 7 and i have 2 network cards, one wireless with internet connection and one wired with local lan connection. I want to use both at the same time so i set the lan card to 1st ...
0
votes
1answer
858 views

Routing multiple WAN subnet on a single interface SonicWall NSA 2400

In my current infrastructure I have the following setup : ISP LINK 1 (64.30.24.128/26) ----|X3--sonicwall--X0|----LAN (64.30.24.128/26) X0(LAN) is configured as Mode/IP Assignment: Transparent ...
0
votes
2answers
34 views

list all route tables

I need to know how to list the IDs of all route tables. For example, I can run: ip rule add fwmark 2 table 104 ip route add dev eth0 default via 192.168.3.7 table 104 A call to ip rule list shows: ...
0
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0answers
29 views

Windows 2008 / 2003 DC can not ping gateway or internet

Im doing some tests trying to setup a domain and i found a very weird behavior. Same thing on windows 2008 r2 and windows 2003 x64 r2. I am running on KVM over proxmox virtualized with virtio. After ...
0
votes
1answer
52 views

Linux Unraid route traffic through different interfaces

I have two interfaces: eth0 and tun5. eth0 is an ethernet to a router and tun5 is a VPN tunnel. These are on an UnRaid server, which is based on Linux. It's a headless server so I access it via SSH. ...
1
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0answers
40 views

How do I get IPv6 packets to my KVM virtual machine?

My setup is: Debian Wheezy x64 on the host and on the guest. I am using a tun/tap setup to connect a virtual machine to the host. The KVM network options I use are: -net ...
1
vote
1answer
183 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
2answers
30 views

Iptables does not seem to be applying SNAT to packets sent on a raw socket

I'm sending packets from a user space program to my wireless interface wlan0. I've set up a SNAT rule with iptables as follows iptables -t nat -A POSTROUTING -o wlan0 -j SNAT --to 192.168.1.3 And ...
0
votes
2answers
758 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
0answers
32 views

Inter VLAN Routing

I have VLAN 1 and VLAN 2 setup on HP ProCurve Switch, each linked to a different scope on DHCP server. VLAN1 = 10.220.0.0/23 VLAN2 = 10.210.0.0/21 I can't ping VLAN1 devices from VLAN2 and vice ...
5
votes
3answers
3k views

How broken is routing strategy that causes a martian packet (so far only) during tracepath?

I believe I've achieved a table that routes packets from and to eth1/192.168.3.x through 192.168.3.1, and packets from and to eth0/192.168.1.x through 192.168.1.1 (helpful source). Question: when ...
2
votes
2answers
717 views

Routing using Linux with 2 NIC cards

Configured Clear OS to be in Gateway mode on a machine with two NIC cards. eth0:192.168.2.0/24 with ip 192.168.2.27 which is connected to a modem and thus have internet connectivity. ...
0
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1answer
18 views

PBR with iptables

I know question was answered multiple times, but this situation a bit different. So here is what I have: All users must user default gateway on eth0, except one That one must only use gateway on ...
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0answers
20 views

PPPD timeout delete the default route

If i have a connection timeout on the PPPD Client the default route will disappear. IP Routing Table (add route dev ppp0) Destination Gateway Genmask Flags Metric Ref Use ...
0
votes
0answers
15 views

Server 2008 web traffic routing

I have a single server 2008 environment with single NIC - 192.168.0.11 Router0 = 192.168.0.250 (Current Default Gateway) Router1 = 192.168.0.251 At the moment we have a single SLOW ADSL 3mbps ...
1
vote
1answer
731 views

Route IP from one vlan to another vlan in the same vrf of the same router

Can you route a IP (/32) from one vlan to another vlan in the same vrf of the same router ? Exemple: example_router#show version Cisco IOS Software, c7600s72033_rp Software ...
0
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0answers
39 views

Ubuntu refuses to route packets for public subnet through linknet

I've run into the novel concept of routing through a linknet from my new ISP, and am currently trying to get a /28 routed properly on my Ubuntu 13.10 server. However, this is proving futile. This is ...
0
votes
1answer
937 views

Trixbox CentOS Default GW Problem (Multi-homed server)

I'm having an issue with a CentOS trixbox server which is dual-homed (one private facing NIC [eth1], one internet-facing NIC [eth0]). I can't seem to get the default gateway to set properly to our ...
4
votes
4answers
190 views

Monitor an internet link to a remote host

I have a Debian Wheezy server running Xivo (let's call it A), this server has 2 interfaces: eth0 and eth1 . There is no default gateway and only a few servers are statically reached from A. eth0 has ...