Command line tool for manipulating and listing the routing table.

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4answers
405 views

Different Routes For The Same DNS

I don't know the right term for this concept. But basically, I just want to reroute internal traffic to go directly to a server within the network instead of going around the internet. The domain have ...
0
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3answers
7k views

How to reach a device on a different subnet?

I have what may seem to be a basic question about routing, but I ask it because I am not sure where to start. I have a simple network setup: Client1, Win7, 192.168.0.50, default gateway is set as ...
2
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3answers
105 views

what's the difference between ICMP prohibited ICMP unreachable?

If I want to forbid a route to response a network, should I use ip route add unreachable 209.10.26.51 or ip route add prohibit 209.10.26.51?
3
votes
2answers
270 views

Is it just me or is my node down?

I find the www.doj.me very useful. I am looking for something like that but specifically for BGP Nodes. I want to write a script that tells the users if our Internet backbone is down, if if yes which ...
1
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2answers
564 views

The ping response time doesn't reflect the real network response time

I encountered a weird problem that the response time returned by ping is almost fixed at 98ms. Either I ping the gateway, or I ping a local host or a internet host. The response time is always ...
2
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1answer
406 views

Windows 7 routing traffic through the gateway for local addresses

Windows is adding a route for a local address (10.0.0.90 - my fileserver) with a gateway of (10.0.0.138 - this is my gateway), the gateway only has a 100Mbs link so all of my fileserver bound traffic ...
2
votes
1answer
2k views

Under what circumstances will Linux ignore the route table when choosing the MAC address for an outbound frame?

While debugging a problem with the networking configuration for a set of virtual machines running under KVM, I discovered a circumstance where the kernel in the guest VM has decided to stamp the ...
0
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1answer
2k views

Why is a ping response being sent to the wrong gateway?

In a previous question, I was trying to determine why my OpenVPN clients could not ping the server LAN, even though the server LAN could ping the clients. Having investigated this further, I ...
0
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1answer
2k views

using a gre tunnel as default route

I have two private networks (A, B) that connects via another company's private network (C). Network A has internet access. I want to make a tunnel between B and A that goes through C. Then network B ...
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1answer
939 views

Windows 7 + IPSec: Force all remote traffic through VPN

I have set up a VPN connection to an remote L2TP/IPSec VPN server, which works fine. Now i like to ensure that all remote traffic is being routed through this VPN, so if the VPN connection drops, no ...
2
votes
3answers
3k views

Route all wlan0 traffic over tun0

I'm looking for a way to route all wlan0 traffic (tcp and udp) over tun0 (openvpn). However, all other traffic originating from the device itself should not be routed through tun0. I'm guessing this ...
3
votes
1answer
3k views

Routing OpenVPN tunnel in via public interface and out via NAT'd interface (to internet)

I hope someone can help... I want to Configure OpenVPN-AS (i.e. OpenVPN Access Server, NOT OpenVPN) to work on my VPS. The VPS is a KVM running Ubunto 10.04 LTS, with a very vanilla configuration. ...
2
votes
2answers
9k views

What does this linux command mean “route add -net 224.0.0.0 netmask 240.0.0.0 eth0”

Could somebody explain what exactly this command means in relation to transmitting and receiving multicast traffic route add -net 224.0.0.0 netmask 240.0.0.0 eth0
1
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1answer
392 views

How do I setup a routing rules to allow https traffic

This is about a clearOS installation. eth0 = external interface (dhcp Internet) eth1 = internal lan, static 192.168.0.10 eth2 = dmz The problem is, after initial installation, I was able to ...
1
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1answer
526 views

iptables and virtual machines of KVM, no ping, no ssh from VMs

Hi everyone :) I have two virtual machines KVM. I did two alias to eth0 - eth0:0 and eth0:1 and put them on an external IPs (eth0:0 - 89.114.122.3, eth0:1 - 89.114.122.4)​​. Now the problem is: ...
0
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1answer
944 views

iptables and virtual machines of KVM, external ip

Hi everyone :) In general, I'm still struggling with the virtual machine KVM. I did two alias to eth0 - eth0:0 and eth0:1 and put them on an external IPs (eth0:0 - 89.114.122.3, eth0:1 - ...
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2answers
218 views

removing static route from linux doesn't disconnect session

I want to test "connection retry" with remote application server. For this, I am using route method, wherein I remove static route from my linux server and check if the connectivity goes down or not. ...
2
votes
1answer
98 views

How can I get the remote machine with Windows Server 2008 after “route /f” executed on it?

Here is the thing, I had made a stupid mistake yesterday. I run "route /f" on a remote machine with Windows Server 2008, and this command cleared the routing tables, including the default route, which ...
0
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1answer
3k views

Static route issue on Windows Server 2008 R2

There's a virtual machine with Windows Server 2008 R2 installed. There are two NICs connected to it: PROD & BUP. The BUP interface is configured without default gateway. After adding static route ...
1
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2answers
922 views

port redirection through a VPN

I would like redirect my tcp traffic to IRC throught a VPN. I mark the packets with iptables and create a new route for this packets: echo 1 > /proc/sys/net/ipv4/ip_forward echo 0 > ...
1
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2answers
2k views

How to remove route with IP?

Used to ban some flood-bots with route add -host $ip reject But couple of 'good' IPs were banned as well. My question is stupid (but I've searched and found no good solution (all were large and/or ...
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2answers
430 views

How do you find current internet network interface?

How do I find the network interface that's connected to the Internet? This machine could typically be connected via {eth0,eth1,usb0,wlan0}. The best I could think of is: sudo route | grep default | ...
18
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5answers
6k views

Use IPtables or null route for blacklisting about 1 million IP addresses?

I've come across a situation where a client needs to blacklist a set of just under 1 million individual IP addresses (no subnets), and network performance is a concern. While I would conjecture that ...
0
votes
1answer
95 views

Internet Backup if DSL & Cable Fail [closed]

We have a T1, a DSL Line and a cable modem in each building to assure that we can connect to the internet in case one fails. However during the latest power outage we also lost all of them and were ...
1
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1answer
510 views

Why specific rouing rule is added after VPN connection is setup on Linux?

After VPN connection is setup the following routing rule is added by default: vpn_server_ip previous_default_gateway This rule appears useless for me. Why it is added? Note: VPN connection is ...
0
votes
1answer
4k views

How to make LAN PCs (Windows) accessible from a SonicWALL L2TP VPN connection

We have several LAN devices connected via a physical wired network to a SonicWALL TZ210 on subnet 192.168.2.0/24. Several of those devices are assigned DHCP addresses in the range 192.168.2.100 to ...
0
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1answer
196 views

Manage the Win2008 routing table

I have a networking issue As I have now two network cards and each one should connect to a specific network; one should be used to connect to the internet and the other one for intranet. I want to ...
1
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2answers
171 views

Network configuration

please see the network map from http://i.stack.imgur.com/HqT7h.jpg I want to connect to network3 from network1 but i want to connect by network2! I have a PC which has Ubuntu 11.04 and it can ...
0
votes
1answer
401 views

centos route problems, can't connect to network

I have an issue with CentOS route... maybe someone can help me to figure it out, how to simple configure route... I have an dedicated ip adress e.g. 13.97.82.85 my netmask is 255.255.255.192 and gw ...
0
votes
1answer
708 views

ASA5505 Route through another Gateway's VPN?

I have 2 routers set up in our office, one an ASA5505 and one is just a smoothwall. The smoothwall has a VPN set up to a data centre rack and users access various servers at our datacentre. I am in ...
2
votes
2answers
1k views

ip over specific network interface

I have two network interfaces with respective ips eth0 : 192.168.70.153 eth2 : 192.168.70.155 when I make route -C Kernel IP routing cache Source Destination Gateway ...
6
votes
2answers
5k views

How many custom route tables can I have on Linux?

I've been working with custom route tables on Linux, and I'm a bit confused by some of the documentation and behavior of the "ip route" command. It seems that the only valid values should be 0-255 ...
4
votes
1answer
4k views

Why Openvpn use network 0.0.0.0 netmask 128.0.0.0 as default route?

If you use "redirect-gateway def1" option in openvpn config file,the server will add a default gateway on your route table, what i want to konw is Why openvpn did not use network 0.0.0.0 netmask ...
2
votes
0answers
220 views

Two separate WAN uplinks for two different NAT networks

I have a server running ubuntu 10.04 with four interfaces. eth0 and eth1 have static WAN ip's, and eth2 and eth3 are connected to two separate NAT networks 192.168.0.0/24 and 192.168.1.0/24 ...
0
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2answers
117 views

My server IP routing problem

I am unfortunately from Iran and I have a Problem with my server. when I type in windows CMD nslookup ParsCMS.com 4.2.2.4 it can not find my server IP, but nslookup ParsCMS.com 8.8.4.4 returns ...
1
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3answers
3k views

Force static route for IP on same subnet?

Any way to force the use of a defined host static route when the IP is on the same subnet and disregards the static route entry? For instance I have a host host: 192.168.1.2 with subnet 255.255.255.0 ...
0
votes
1answer
1k views

Masquerade traffic from certain source IP to VPN connection

Network Setup: 10.0.0.1 Router: to internet 10.0.0.70 Server: Ubuntu based server,default gateway is 10.0.0.1 10.0.0.51 PC I created a PPTP connection(interface: ppp0) on Server to a machine ...
0
votes
2answers
458 views

Add a route to virtual machine on a different computer

I'd like to add a route from my computer to a VMWare Virtual Machine which runs on a computer in a different office. I can access the host computer (192.168.110.164) where the machine is running on a ...
1
vote
2answers
3k views

Static route for entire octet or by host name?

I've added a few static routes, for the most part the following has worked fine: route add 123.123.123.123 mask 255.255.255.255 100.100.100.100 metric 10 -p However, one URL resolves to more that ...
-1
votes
1answer
196 views

Network communication in 2Hosts [closed]

We have 2 Linux Hosts each has 2 Nic Cards with below IP addresses,ech0 and eth1 are in different network , Host1:eth1 and Host2:eth1 are connected by direct cable, due to some Hardware issue N/W ...
3
votes
3answers
3k views

CentOS Wrong Outgoing IP Address

I have a Centos 5 box with a sub interface: ifconfig eth0 10.1.1.1 255.255.255.255 ifconfig eth0:1 10.1.1.2 255.255.255.255 The netmasks need to be 32bit in the environment this server is in. So ...
1
vote
2answers
2k views

SciLinux6 (RHEL6) how to specify network setup and routing the redhat way?

I've got a SciLinux 6 box with 5 nic's in it. I'm not getting the network configuration I want (particularly the routing). While I can certain put a bunch of route statements at the end of rc.local, ...
3
votes
2answers
977 views

how to add iptables rules for two NICs on CentOS(act as a gateway)

I have a machine C with two NICs, namely eth0 and eth1, with CentOS 4.9 installed on it. Also I have a machine A connecting to C through eth0 and a machine B connecting to C through eth1. Now I want ...
1
vote
1answer
98 views

Unexpected auto-route after adding a new /29-Net

I added a new Network to a Debian 6.0.1 x86_64 Linux 2.6.32-5-amd64 Server with this configuration in the interfaces: allow-hotplug eth2 iface eth2 inet static address 172.251.1.86 netmask ...
0
votes
1answer
38 views

Configuring ip, subnet and gateway on eth interface

I'm in terminal on RedHat 5 and I need to configure one of the two eth interface with different IP, GATEWAY and SUBNET. I know ifconfig and route add but I'm not sure what I have to do for ...
1
vote
4answers
683 views

Is there a tool like 'route' in Linux to configure the forwarding entry (dst mac address --> interface)

I have a problem in configuring the forwarding table in Linux. We call IP tables for routing table in layer 3, MAC tables for forwarding table in layer 2. Now I want to add an entry in forwarding ...
0
votes
2answers
427 views

set default route interface in iproute2

I have two machines. One runs arch linux and another runs fedora. arch uses iproute2. so i need a conversion for iproute2 from route. this command will set the default interface to ppp0. I have ...
0
votes
1answer
4k views

how to add a static route to external gateway(external IP)?

I am having an issue with setting up a static route in Fedora. I need to route some traffic to an external gateway(105.101.67.70 - public IP address of a VPN router). Any request sent to ...
0
votes
1answer
101 views

iptables - websites redirection

I have three servers. The first is a for my front the two other http server : for dispatch. I want for example, do : receive a request on my front (public) : site1.com an redirect the request on ...
0
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0answers
283 views

cannot ping through gre tunnel

This question has been merged I have 4 machines machine 1 have ip address 172.13.0.40/24 machine 2 have two ip address 172.13.0.1/24 and 172.12.0.1/24 machine 3 have two ip address ...