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2answers
3k views

choose the outgoing interface for a default route

I have a FreeBSD 8.0 virtual box with two ethernet interfaces, em0 and em1. em0 is 192.168.1.99 and em1 is 192.168.1.100. Both are "Attached to: Bridged Adapter". When both are up, if I say # route ...
3
votes
3answers
640 views

In Linux, does using route to blackhole an IP result in better performance than dropping in iptables? [duplicate]

During a DDOS attack, if we are finding IPs we want to block will we see better performance using a null route as opposed to iptables? Null routing we would do something like: ip route add blackhole ...
2
votes
2answers
507 views

Routing through subnets, static routes

Topology: C1 --192.168.111.0/24 -- R1 -- 172.30.0.0/24 -- Switch -- C6 |-- R2 -- 172.30.10.0/23 -- C5 I am a newbie in networking and I have a ...
1
vote
1answer
348 views

Static route works on one computer, not the other

I have been struggling with this for a couple days now, maybe I just need some people with a fresh perspective to figure out what the issue is. Basically I have a bunch of computers that are being ...
0
votes
1answer
259 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 ...
2
votes
1answer
1k views

Recover from running “route -f”

I was trying to capture localhost traffic with Ethereal, which doesn't work without re-routing localhost traffic to your router gateway. I didn't get the route command quite right, and messed up my ...
1
vote
4answers
428 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 ...
3
votes
3answers
537 views

Force transmission of TCP/IP data from one NIC to another on same PC

We are preparing a product for EMC testing. The product runs Windows Embedded Standard 2009 (compare it with Windows XP) and has 2 NICs, say NIC1 and NIC2. For the emission test, we need to send data ...
2
votes
1answer
977 views

IP Bridge for KVM with multiple subnets

I have a machine set up running KVM and a bridge on eth0 with the ip address for the machine. The machine has an IP address in a range with no more ip adresses free. I am trying to make a second ...
0
votes
1answer
86 views

Routing via Linux

I have an individual network with a single machine having IP Address 10.10.10.4. Another machine (Gateway Machine) has two NICs: eth0 and eth1. eth1 (10.10.10.10) is connected to the internal network ...
0
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1answer
49 views

Does the following route change include undesired machine?

I want to utilize both the wired lan from the company and the wireless from my phone( achieved by PdaNet ). I need to seperate the connections in the route table because the wireless connection have ...
0
votes
0answers
1k views

ddwrt - multiple wlan each on own vlan - confused

I have a WRT610n running DDWRT v24-sp2. My goal is to setup: Single connection from switch to WRT610n, and switch passes tagged VLAN 50/40 and 1 (untagged) On WRT610n the 3 LAN ports (eth1/2/3) and ...
1
vote
1answer
298 views

Sonicwall firewalls and redundancy of route based vpns

I am attempting to configure a route based vpn on a Sonicwall TZ device. The datacenter has two public IPs on different subnets (A and B). The remote office has 1 public ip (C). When I configure ...
0
votes
1answer
31 views

How to serve clients when provider's channel is down?

GPRS-devices can connect to server only by ip. They are permanently connected to the server. How to prevent Denial of Service, when internet-provider's channel is down? Is there any standart ...
0
votes
1answer
188 views

Route-map changing from permit to deny retains the match tag values

I have a route-map configured on my cisco router with name say s1 and sequence number 10(default) which contains a match tag 10. If i again try to configure the same route-map name with same sequence ...
0
votes
1answer
990 views

route traffic to different interface, from port

I got three gateways: 192.168.10.1 on eth0 (default), 192.168.100.1 on eth0:0 192.168.101.1 on eth0:1 I'm trying to make my computer decide on which to use, from the request port. (request comes ...
1
vote
2answers
658 views

Ubuntu server acting as a two interface router

I'm trying to set up a squid proxy server using Ubuntu server 12.04 I'm very new to Ubuntu but I have managed to get some simple things done. I bought a second PCI interface and have managed to ...
0
votes
1answer
149 views

Route local traffic to ip1:port to extern ip2:port

I have a service setup that redirects after a succesfull login (Couchbase), but the IP it transfers to is an local one, where the client that is connecting to cannot reach. How can I setup iptables ...
0
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2answers
3k views

How to route UDP traffic from one public IP (linux) to another public IP(Windows)

I want to prevent direct access of my Windows Machine and want to expose some programs running on it via my Linux Machine (which again is accessible by a Public IP). Is there a way where-in I can ...
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4answers
4k views

How can I force all internet traffic over a PPTP VPN but still allow local lan access?

I have a server running Linux Mint 12 that I want to keep connected to a PPTP VPN all the time. The VPN server is pretty reliable, but it drops on occasion so I just want to make it so all internet ...
2
votes
2answers
522 views

Iptables string

I have an iptables rule like this: iptables -t nat -I PREROUTING -p tcp --dport 80 -s 192.168.1.2 -j DNAT --to-destination 192.168.1.1:80 it works perfectly.. but I want to redirect only for one ...
0
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1answer
601 views

Windows route add error

Windows Server 2003 Standard Edition C:\Documents and Settings\Administrator>route print IPv4 Route Table Interface List 0x1 ........................... MS TCP Loopback interface 0x10003 ...00 14 ...
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2answers
317 views

Can't route specific subnet thru VPN in ubuntu

I'm having issues routing traffic thru VPN. Here's my setup I have 3 hosts, let's call them A, B and Z B and Z have a VPN connection in the 10.10.10.x SUBNET A and B have a direct connection in the ...
0
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2answers
344 views

connecting to a network using route command

I have a computer with an external IP(192.168.223.220) and also an internal address (10.1.1.20) in order to connect to some servers that don't have external addresses only 10.1.1.xx . in order to ...
3
votes
2answers
234 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 ...
4
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1answer
571 views

Listing the routing table takes long time to complete

When I print routes defined on my computer using route, it takes about 5 to 20 seconds to complete. Why does it take so much time? With VPN enabled: $ time sudo route Kernel IP routing table (...) ...
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0answers
902 views

Can't ping Ip over bridge

I'm unable to ping another host over a bridge I created, I can't see the error -.- It's a remote machine running debian stable with some backports for which I want to set up DHCP on the new Subnet ...
0
votes
2answers
59 views

4 nodes to the internet, everything works except 3rd node

I have 4 nodes to the internet: Internet <--> Node A <--> Node B <--> Node C <--> Node D Node A: main gateway, manage internet Node B: gateway/tunnel to node C Node C: ...
7
votes
3answers
27k views

Why ip route add doesn't work, but ip route add with less details and then change works?

I have a problem with ip route add. Surprisingly, I can add the route then change it, but I cannot directly add it: # ip route add 192.168.0.0/16 via 192.168.255.254 src 192.168.1.101 RTNETLINK ...
2
votes
2answers
5k views

Connecting two subnets using an Ubuntu 10.04 LTS as a router

This has been bothering me for a couple of days, I have two subnets: 192.168.1.0/24 : This is the subnet used by my ISP/router. The gateway to the WAN is 192.168.1.1 192.168.2.0/24 : This is a ...
1
vote
0answers
316 views

Route VPN gateway traffic via tun0

On my Linux box, I got a tun0 dev by ipip like: tun0 Link encap:IPIP Tunnel HWaddr inet addr:10.10.10.2 P-t-P:10.10.10.1 Mask:255.255.255.255 and I running a ipsec vpn ...
1
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2answers
92 views

LAN to LAN VPN connectivity issues

I have a route-based VPN with limited functionality. My computers on site-A can ping one workstation on site-B, it happens to be the only workstation that is not part of the domain that has been ...
1
vote
1answer
367 views

BSD route(8) MAN page bug

http://www.freebsd.org/cgi/man.cgi?query=route Route is a utility used to manually manipulate the network routing tables. It normally is not needed, as a system routing table management ...
2
votes
1answer
341 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 ...
1
vote
1answer
334 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 ...
0
votes
1answer
701 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 ...
0
votes
1answer
1k 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 ...
2
votes
1answer
1k 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
981 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 ...
1
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2answers
4k 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
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vote
1answer
499 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
votes
1answer
767 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 - ...
1
vote
2answers
194 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
86 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
2k 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 ...
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2answers
821 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 > ...
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0answers
607 views

How can I route traffic through local server with VPN connection to remote network

I have a Sonicwall NSA 220 on my work network (10.0.2.x). I have a tomato 1.28 router (192.168.1.x) on my local home network. Behind that router I have a windows 2003 server (VPN: 10.0.2.195, LAN: ...
0
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0answers
387 views

Bidirectional NAT using iptables

I want an Ubuntu server machine to act as a bidirectional NAT. It has 2 NICs, each connected to a different network. I want it to forward connections received on eth1 at certain ports to certain ...
5
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1answer
390 views

CCNA Case Study - Static Routes

I'm currently doing the CCNA (Cisco Certified Network Associate) course at school and am a bit stuck on my case study, so I was wondering if anyone could help. I have the following topology: I ...
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2answers
1k 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 ...