0
votes
0answers
11 views

IP rule table look up does not seem to work

I have a sytem with three network interfaces. Below is the configuration that I'm trying to set up. wlan0 (its actually an WiFi AP interface) - other devices connects via this interface. net1 - ...
1
vote
1answer
40 views

Split Tunneling: How do I know which IP addresses should go to the VPN network?

I have setup my VPN client (VPNC Front End) to use split tunneling. After the VPN is connected, I have a script which adds the routes for all of the IP addresses that I know should be routed through ...
0
votes
0answers
26 views

how to check if ddwrt vpn client reaches remote subnet?

I spent many hours trying to setup a VPN connection from my router to a VPN server where I have an account. After upgrading to a newer build, I finally see some entries after issuing ip route on the ...
0
votes
1answer
30 views

How to setup routing on a Windows 7 machine

I have a machine with 2 network interfaces. The network itself looks like this | access point | wi-fi | my machine | | 2-nd machine | | 192.168.1.1 | ...
0
votes
1answer
92 views

Windows 7 setup routing between 2 networks

Situation: | access point | wi-fi | my machine | | 2-nd machine | | 192.168.1.1 | --------- | 192.168.1.37 | Ethernet | | Internet ---- ...
0
votes
1answer
53 views

Policy route by source MAC address

I have a requirement to perform MAC based policy routing on embedded Linux platform (desktop Linux example will work as well) . I have examined the man of ip route add command and did not found ...
0
votes
0answers
27 views

add to table not working with ip route

i have added two table names wifi and voda to /etc/iproute2/rt_tables. 255 local 254 main 253 default 0 unspec 1 wifi 2 voda Now i am trying to add rule to the ...
0
votes
0answers
39 views

Ping issues and configuration issues

My host machine has an IP 10.116.65.150 and my secondary machine is part of the same network. (( I did connect my laptop to the same ethernet and switch link as I had connected my secondary machine ...
0
votes
2answers
332 views

Sending multicast packet with source IP equal to virtual interface IP in Python

I have a system with a virtual network interface eth0:1, and I want to send multicast packets that have a source IP of that interface. However, my packets end up with the source IP for eth0. How do I ...
1
vote
2answers
76 views

How to find the IP address of a router

I live in a dorm where many students have setup small wireless networks. There are two of this networks that are very close to my room as the signal is very strong. Our college uses DHCP to assign IP ...
1
vote
2answers
725 views

Multiple IPs on Multiple NICs same subnet

So, I've got two NICs: eth0 eth1 and I have multiple IP addresses assigned to each: auto lo iface lo inet loopback allow-hotplug eth0 iface eth0 inet static address 10.0.0.194 netmask ...
-2
votes
1answer
23 views

Routing table information

I want to find all the possible ip addresses my router can send packet to. I know there is a command route print that give let me see the default gateway, but I want to get all the possible ip address ...
1
vote
1answer
60 views

Get LAN and WLAN networks under same IP range

I'm a newbie in network stuff and haven't enough knowledge to do what I'm wanting for now, so I need your help, please. I've two networks, a wired and another wireless. The wired one is between two ...
0
votes
0answers
105 views

Add a VLAN for virtual machines to Tomato USB

I've got an ASUS RTAC66U with Tomato Shibby 1.28 v115 installed. I've got some VMs with which I'm trying to replicate a set of servers, down to IP address to debug some stuff. I've set the VMs to ...
0
votes
0answers
117 views

Mac OS X trouble with certain hotspots

As an admin, it bugs me horribly when I personally have network issues I can't explain/get decipher - maybe you guys can shed some light. Running a MacBook Air with the newest incarnation of Mac OS X ...
0
votes
1answer
59 views

Remote IP on a local device

What I want to achieve is to be able to have one of the IP addresses from a remote server on a local server (raspberry pi). Right now the network map would look like this: RPi (192.168.0.42) ---> ...
0
votes
1answer
41 views

how to access a range of public IPs only through a VPN?

For security reasons, I am not supposed to access an otherwise public IP range unless a VPN is up. However, if my VPN is down, my system routes to the IP anyway, which is a breach of my obligations. ...
50
votes
7answers
6k views

IP address that is the equivalent of /dev/null

Is there an IP address that would result in any packet sent to be ignored (blackholed)? I know I can always set up a router with an IP address and then just have it ignore all packets sent to it, but ...
-1
votes
1answer
55 views

routing table, ip address for outgoing packet

Network Destination Netmask Gateway Interface 0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.8 ...
0
votes
0answers
75 views

Adding an IP block into VMWare Esxi

I have a dedicated server with VMWare Exsi 5.5 installed and I have recently bought another /29 from my colo provider. They have set things up so that it works this way: Original: Network: 1.2.3.1 ...
1
vote
2answers
266 views

Why nic with incorrect subnet mask can still ping the gate way?

At first, my network config was like this: $ ip a 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 3c:97:0e:bd:b1:68 brd ff:ff:ff:ff:ff:ff ...
0
votes
0answers
94 views

how to proxy to a VPN connected server with local services running?

I'm having trouble accessing services that are running on my Linux Box from outside the local network. The setup is not as simple as most tutorials describe so I'm a bit stuck. My Linux Box (running ...
1
vote
1answer
496 views

Two wi-fi networks fighting over some IP addresses

I presently have two wi-fi adapters running on my laptop. The one with the highest priority is connected to my phone's wi-fi tethering, and I've been assigned a dynamic IP address usually around ...
0
votes
0answers
64 views

Let everything except SSH/VPN use a VPN-Connection, but keep SSH working

Given the latest revelations about the size of Internet surveillance, I decided to route all my traffic trough an out of country VPN. I set the OpenVPN client up on my Router (Asus RT-N56U using ...
2
votes
3answers
282 views

Routing a static private IP address

I'm running a home server inside my NATed LAN, which is connected to the Internet through a D-link DIR-652 home router. I have specified the necessary port forwards at the router settings and have ...
1
vote
1answer
209 views

Route between two machines on the same network (but different IP ranges)

This is the network topology I'm working with: .______. | | |Modem | 10.0.0.1 |______| | | .______. | `----------------| | | |Box A | ...
-1
votes
1answer
158 views

How do routers deal with IP packets whose source IP or destination IP is all zero?

All zero IPs are said to be unknown IPs. I'm wondering, if the source IP or the destination IP of a IP packet is all zero, how do IP routers deal with it? FYI: I'm doing research, and I want to use ...
88
votes
13answers
12k views

What is the exact use of a MAC address?

I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet. With MAC addresses, there is no hierarchy, and thus packet forwarding ...
4
votes
1answer
1k views

Does the order of entries in the routing table matter?

Does the routing order matter: > route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 123.x.x.151 0.0.0.0 255.255.255.255 UH ...
0
votes
1answer
692 views

Multiple Subnets Routed Through Separate Network Interfaces Assigned Static Public IP's Going Through a Single WAN Connection

Question moved and completely re-written here. I have a block of Static IP's from my ISP and I am looking to setup separate network interfaces inside DD-WRT that all go through the single WAN ...
1
vote
2answers
370 views

TCP SYN does not reach TCP server

I have a TCP server listening on 10.10.10.101, port 2000, running on a Windows 7 machine. Below is the corresponding output line for the command netstat -aon: TCP 10.10.10.101:2000 0.0.0.0:0 ...
1
vote
1answer
3k views

How can I find the external IP address of my router if the router is a subnet of bigger LAN

I re-edit to simplify my question. My computer’s IP address is 192.168.1.10 and the router/gateway's IP is 192.168.1.1 (internal IP). I'm trying to find the external IP of my gateway or router. ...
2
votes
1answer
137 views

why IP in different countries are in the same autonomous system?

I notice some IPs, they are not in the same country, and these countries are not neighbors, but they share the same Autonoumous system number how can this happen?
0
votes
2answers
81 views

Linux: Any distro-independent way to change and persist IP settings?

Are there any distribution-independent mechanisms for tasks like assigning static IP addresses, adding or deleting routes, etc and, then, also be able to persist the changes so made? AFAIK, each ...
0
votes
1answer
118 views

How to drop IP packets received on the default route interface when no other than default route is found?

I am setting up a router based on a linux kernel. As expected, ipv4 packets received on the interface used by default route are sent back to the same interface in case no other route is found. Is ...
7
votes
3answers
4k views

What's the difference between 127.0.0.1 and 127.0.0.0

I know that both are loopback IPs, but they have another ip mask. What's the difference between them? Can they be used interchangeably? ...
0
votes
1answer
525 views

Subnetting an IP address (172.16.0.0/12) into 2 subnets

Say I have the private network address 172.16.0.0/12 and I want to split it into 2 subnets. There are 12 bits used for the network number leaving 20 bit for the host number. I use 1 of these host ...
0
votes
1answer
466 views

Subnetting 90.103.80.0/21 into 8 subnets with at least 250 hosts per subnet

I am studying subnetting and I am not sure if I've got the hang of fully. Here's a question I've answered with my answers posted below it. I am particularly unsure about Question 4. I'd appreciate ...
2
votes
2answers
1k views

How to ensure Internet access is only via VPN [duplicate]

I have a Windows 7 machine with a regular wired Internet connection, configured via DHCP. It has a VPN connection set up. How can I ensure that Internet access is allowed only over the VPN? That is, ...
1
vote
0answers
328 views

iproute nexthop not working - defining multiple default gateways

I have several point to point connections and I'd like to use all of them as default gateways. I saw this link which explains how to do this using load balancing by calling ip route with a nexthop ...
1
vote
1answer
450 views

How to use ip rule and ip route commands for IPv6 addresses?

For IPv4 we use: ip rule add from (ipv4 address) table 60 ip route -net (ipv4 address) mask (ipv4 mask) (interface number) How do I use the ip rule and ip route commands for IPv6 addresses?
7
votes
3answers
3k views

How does the router know which device to send packets to?

my question does not concern how it moves through the internet, but how it moves through the router to a certain device. All devices connected to a router in a home network have the same external IP. ...
0
votes
1answer
199 views

Are static routes from an ISP to a company network classful or classless?

The background to my question is a recent Cisco networking skills exam, where one requirement was to set up an ISP router with a static route back to the company's border router. I used a Class B /16 ...
1
vote
0answers
43 views

Route everything from some VLANs to a tunnel

I've set up a tunnel: $ ip tunnel add mytunnel mode gre remote x.x.x.x local y.y.y.y ttl 255 $ ip link set mytunnel up $ ip address add 172.17.10.2/30 dev mytunnel $ ifconfig mytunnel up Now, I can ...
0
votes
3answers
1k views

I can't externally access my home server's wordpress website

Basically, I can access everything just fine using 127.0.0.1, but if I use my external IP (123.123.123.123), I get page not found. My router is port forwarding HTTP port 80 to port 8080 on my servers ...
0
votes
1answer
929 views

How to route traffic via another machine before the default gateway

At the moment I have a router on 192.168.0.1, a Linux box on 192.168.0.2 and desktop clients from 192.168.0.3. Everything works with 192.168.0.1 as the default gateway. I'd like to send the traffic ...
1
vote
1answer
353 views

Routing Between Intranet and Internet

I have 2 ADSL Modems: One is for intranet connectivity, the other is for accessing the internet. I connect the intranet to my PC on network interface "Local Area Connection", and connect to internet ...
0
votes
0answers
450 views

Route one network client to VPN server via a Linux gateway server

I have a Ubuntu server (Ubuntu 10.04.4 LTS) acting as a gateway to my home network. I set up a VPN connection with the linux-pptp client and now have it as an interface on my home server. ppp0 ...
2
votes
1answer
492 views

routing a secondary IP-addr. of a different private network on the same interface

Typical home-networking xDSL setup on a TG782 router/gateway. Hosts on the local private network are allocated IP-addresses in the range of 192.168.1.0/24 and can get to WAN through the aforementioned ...
0
votes
1answer
403 views

Is it possible to add a null route to an Airport Extreme?

The Airport Extreme doesn't seem to have an IP access-control list (ACL) to block outbound access to a particular IP address. Is there any way to add a null route or a blackhole for a specific IP so ...