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

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Openswan : Traffic not passing through tunnel

PLEASE HELP : whenever I ping one of the other site servers , the connection does not go through the other site public ip. the setup is as follows : Public gw ip of other site : 6.6.6.6 Server that ...
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34 views

Openswan VPN routing issue

I have configured the openswan VPN correctly on an EC2 server ( Elastic IP ), and it shows 2 tunnels up. Given the following setup : MY_PUBLIC_IP: x.x.x.193, MY_ENCRYPTION_DOMAIN: ...
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1answer
50 views

route traffic directly without vpn while the vpn still connected

I have a box with fedora, connected to vpn, forwarding done by iptables, every thing is fine, and it is always connected, vpn interface is ppp1, connected through the pppoe interface: ppp0, but ...
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0answers
17 views

Why two network with NAToverload not communicate?

I have two private networks: 192.168.1.0 192.168.2.0 These networks communicate with each other via static routing, but when I set up the NAT overload, they don't communicate. Why? I examined the ...
2
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2answers
208 views

Linux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMs

My Setup: There is only one physical machine in this setup, a Host System for Virtual Machines (VMs) with two network adapters. One NIC (eth0) is connected to an internal network (LAN subnet, e.g. ...
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63 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
0
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1answer
64 views

AWS VPCs + VPN between regions. How does DNS work?

When using a VPC on AWS DNS is handled in a neat way whereby any requests for the external DNS name for an instance in the VPC resolves to the local/private IP address of the node. This is useful ...
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1answer
40 views

OpenVPN: Setting client's ip address as route gateway

I want to create an OpenVPN config entry which looks like this: route 255.255.255.255 255.255.255.255 {CLIENT_IP_ADDRES} Is there any way to accomplish this without hard-coding the client ip into ...
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0answers
70 views

Change source address based on destination IP: NAT or routing?

I have a router/host with multiple public IP addresses. I want to change the source ip depending on some destination addresses. This has already been asked here: If the traffic originates from some ...
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13 views

isc-dhcp: provide routing option?

I wonder if it is possible to provide Windows port forward using isc-dhcp. In my company we have 2 internet connection and the first one is highly restrictive. So we cannot do FTP or SFTP on this ...
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1answer
39 views

Can TCP be used like UDP by simply not sending ACK?

Assuming both client & server cooperated, could you emulate the functionality of UDP by not sending ACK packets, and not sending retransmissions? Or would most routers somehow bork the process if ...
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74 views

How can I do traffic shaping in Linux by IP for both way communication?

Well, I've already gone through How can I do traffic shaping in Linux by IP? on serverfault & what I'm trying to achieve is pretty much same. Internet--------Linux Router----Switch-----Clients ...
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1answer
135 views

Difference between “genmask” and “netmask”?

In the output of route -n on Linux, you get something like this: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.0.0.1 ...
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2answers
78 views

Can I add a static route to a VPN network if the default gateway IP is dynamic? (Windows 7)

Can I add a static route to a VPN network if the default gateway IP is dynamic? (Windows 7) This is easy to solve with a permanent route if the default gateway does not change as you can do this: ...
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1answer
34 views

Using gateway on remote network to reach another subnet

I have the setup like this: VPN Clients VPN Server 10.1.1.2 10.1.1.1 ---> Internet 10.1.1.3 10.1.1.4 10.1.1.5 | \ 10.0.0.0/24 LAN The VPN clients are using the VPN server as ...
9
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1answer
257 views

Multipath routing in post-3.6 kernels

As you all probably know, ipv4 route cache has been removed in 3.6 Linux kernel series, which had serious impact on multipath routing. IPv4 routing code (unlike IPv6 one) selects next hop in a ...
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1answer
57 views

differences between adding ip route to system and adding additional ip address

I found that I can add an additional ip address to a network adapter which appears to be solving my problem of having multiple devices I need to talk to which are on different subnets (but same ...
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0answers
36 views

ip rule not acting on fwmark

I'm trying to use iptables to load balance web traffic over multiple DSL lines by marking the packets and routing based on the mark. I'm working with CentOS 6.6, Kernel 2.6.32-504.16.2.el6.x86_64, ...
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1answer
35 views

Virtual networking, can ping and traceroute, can't apt-get update [closed]

I'm building a virtual network with 6 virtual machines in virtualBox. One of them acts as router/nat/firewall. This first machine uses 4 network cards: eth0 -> Internet eth1 -> Subnet 1 eth2 ...
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0answers
36 views

Overseas traffic issue [closed]

I have recently seen two problems related to overseas traffic where the traceroute shows that the problem seems to be located on the U.S. side. The traceroute drops off at the last leg ex. Amazon AWS, ...
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0answers
43 views

OpenVPN routing based in LDAP Authentication?

To understand the solution better this is an example: The company has 1000 users that constantly switch seats (computers are set with DHCP IP, so the user can constantly have his IP address ...
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0answers
29 views

Linux router showing packet loss

I have two linux boxes that are using a third box as a router. Packets flow normally. BoxA(10.0.0.10) -> (10.0.0.20) RouterBox (172.16.50.20) -> BoxB(172.16.50.30) When I run mtr from BoxA to BoxB the ...
0
votes
1answer
46 views

forwarding ping using ip route [closed]

I have a Linux setup which consists of two interface. A local LAN interface and virtual interface. ETH0: 150.10.15.194 PAN0: 192.168.255.209 I would like to set rules that route all ICMP echo ...
0
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2answers
59 views

VPN Client Routing

I'm having trouble getting my VPN client on open-wrt to work. The actual VPN connection works fine and I was able to access the remote network from the router but when my VPN is active it shuts down ...
2
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1answer
117 views

cannot ping linux network namespace within the same subnet

Here is a quick summary of the issue. I cannot communicate with a linux network namespace within the same subnet. I am running Ubuntu 14.04.1 LTS on a headless server. I have been troubleshooting this ...
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1answer
79 views

WAN IP Ranges and NAT [closed]

Let's say we have a router with a WAN IP assigned by DHCP: 1.1.1.1/255.255.255.255 The ISP subnet for it's lan interface is 82.5.167.161/255.255.255.248 My firewall behind this router is on WAN IP: ...
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0answers
35 views

RRAS Routing Shenanigans

I have A RRAS server running on an AWS VPC (10.145/24 network) with address 10.145.0.77. I have a DHCP server/scope set up (10.250/16 network) on a separate Microsoft loopback adapter to offer DHCP ...
1
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1answer
69 views

How to combine multiple route hops using one (pfSense) router?

I am trying to come up with a way to consolidate two routers into one. I have the following network configuration: LAN <-- a/24 --> NAT Firewall <-- x/29 --> Router <-- y/30 --> ...
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0answers
73 views

Adding a remote default route gives SIOC[ADD|DEL]RT: No such process

I have searched the whole web for this but it seems no one has had similar problem. I have a local network (no internet) which my router ip is 10.201.32.10 and my gateway is 10.201.32.41 I have a VPS ...
0
votes
1answer
39 views

Static route to Single IP using SSL connection

I am trying to configure a static route to a single IP. My question is two fold: How do I specify a single IP using a subnet mask x.x.x.x/? (not a range of ip's) My pc is making an SSL connection to ...
0
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1answer
138 views

Configuring iptables for Haproxy

Ubuntu machine running haproxy with 2 network cards, 1 connected to WAN (called wan0) and another connected to LAN (called lan0). All chains set to DROP traffic. # Masquerade traffic from LAN to WAN ...
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169 views

ZyWall USG-100 Firewall block access to internal subnet beyond another router

I'm experiencing a strange problem with a ZyWall USG 100 Firewall, that I can't solve with leaving the firewall enabled on the ZyWall. I have the main network subnet that is 192.40.192.0/24(LAN1 on ...
0
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1answer
34 views

OSPF and routing by subnet prefix

Sorry for newbie question for OSPF. I am in the process of learning the protocol, and there is some very basic thing I do not understand. In OSPF the routing is based on router id - which usually is ...
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1answer
432 views

How to install mikrotik routerOS on my computer [closed]

I got a mikrotik routerboard 950G and i downloaded netinstall v6.8 but i cannot install the routerOS into my computer. Can anybody help me out?
3
votes
1answer
294 views

OpenVPN routing: multiple default entries. OpenVPN client: iptables. DNS issues

I'm running an OpenVPN-Server (Debian 8) for privacy purposes when using public wifi. Hence, all network traffic of the client is intended to be handled over the VPN connection. The server and client ...
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2answers
51 views

CentOS Multi Nic and Policy Routing?

I'm not familiar with CentOS and I need help doing the routing for this. I have a CentOS box with 3 NICs. eth0 Link encap:Ethernet inet addr:10.50.121.16 Bcast:10.50.121.255 ...
0
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1answer
58 views

route output traffic from specific NAT'ed VM via ip alias

In a dedicated server with several containers behind NAT, I'm trying to route the output / outbound traffic from one of the containers through a specific virtual interface attached to the main ...
0
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1answer
35 views

Enlarge IP Network Address Space

Our small company uses a 192.68.0.0/24 network. As there are only 256 IP addresses, we will be running out of IP addresses soon. I wonder about the best strategy to change the network. Some devices ...
0
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2answers
50 views

Is a “bridging device” required to join two networks?

We're considering two NBN fibre connections to the Internet (NBN is a fibre connection for those of you not living in Australia), with each connection having it's own subnet. The first connection's ...
0
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1answer
247 views

Route all traffic through StrongSwan VPN

I'm new to this - please excuse my ignorance. I have looked through many other similar questions to no avail. Trying to set up a StrongSwan VPN such that client C can connect to host H, be assigned ...
0
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1answer
69 views

Force a traceroute to go through added IP address

Currently speaking I am on a linux (debain) machine which has 2 routed public IPv4 address: 1.1.1.50 1.1.1.60 Both of these IP addresses are currently simply added as a vitual host: 1.1.1.50 -> ...
0
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1answer
97 views

Route a port through a specific network interface

I'm using OpenVPN on Ubuntu Server to connect to my VPN. That network interface is tun0. All traffic currently goes through the VPN. I'd like to exclude traffic that goes over a specific port, and ...
0
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0answers
53 views

How to forward traffic from ipsec host to local network?

Could anybody explain how to implement forward traffic from host in IPsec to local network. On my server I have 3 network cards: red0 - extern orange0 - dmz green0 - local IPsec builds through ...
3
votes
1answer
55 views

Reaching out DHCP relayed hosts

I have one primary server (DHCP) and one secondary (DHCP-RELAY). Majority of hosts are served from primary (wirelessly), however there are a few (wired ones) which get their IPs from secondary. ...
0
votes
1answer
90 views

Routing: why do I need to add an extra route in the 2nd router

Consider the following network ^^^. The virtual network setup in Azure: 10.10.0.0/16 with 1 subnet, 10.10.0.0/16 and a gateway subnet at 10.10.1.0/29. Azure knows how our network looks like, 2 ...
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0answers
93 views

IP-rules don't seem to be working on CentOS-6.6

I faced a bit odd difficulty with policy-based routing on CentOS-6.6 server. I have a setup where I need to enroute all packets originated from 172.25.0.0/16 destinated to 172.24.0.0/16 and some ...
0
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1answer
98 views

How does an AWS VPC instance route traffic internally and externally over 1 interface?

An instance brought up in a VPC with internet access is able to respond to traffic directed to an internet routable public IP assigned to it, as well as the internal subnet IP it has on it's only ...
2
votes
1answer
55 views

Outgoing packet has NATed src address

Configuration/Topology: There are 3 machines hadoop2 | hadoop | driver eth0 10.10.15.3 | eth0 10.10.15.2 | tap0 192.168.0.199 ...
4
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1answer
141 views

Can I have different routing table for different users?

My Linux machine have two accounts. I want to set different default gateway for the different accounts. How can I do this, if it is possible?
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0answers
64 views

keepalived cluster ping physical ip fails

My szenario looks like below: Router = R[number] Switch = S[number] R1      R2  I           I S1-----S2 ...