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

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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
28 views

WAN IP Ranges and NAT

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
11 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 ...
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0answers
26 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
17 views

Need all local traffic through Debian - Routing? [migrated]

Been dealing with this for some hours now and my head are really spinning. So I got this cable network router (192.168.0.1) that Im trying to pass all my local traffic to. But I cannot for the life ...
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0answers
13 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
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1answer
21 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 ...
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0answers
23 views

Why would my logged public IP differ depending on the type of server (or computer) I am connecting to? [migrated]

I am writing a p2p gaming lan emulator that uses the torrent infrastructure to network peers, set up lobbies, etc. Currently, the only infrastructure we are using is the trackers (we plan to us Tox ...
0
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1answer
23 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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0answers
31 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
25 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
48 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
101 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 ...
0
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2answers
27 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
22 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
26 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
30 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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0answers
8 views

NetworkManager changes default routing policy [migrated]

I have a machine with a built-in NIC (eth0), which serves as a DHCP server for a Raspberry Pi. I also have a USB 3G modem, which shows up as ethernet device eth1. eth0 has the static ip 192.168.100.1 ...
0
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1answer
39 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
33 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
35 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 ...
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0answers
20 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
39 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
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1answer
42 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
46 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
48 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
50 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
votes
1answer
79 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?
0
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0answers
48 views

keepalived cluster ping physical ip fails

My szenario looks like below: Router = R[number] Switch = S[number] R1      R2  I           I S1-----S2 ...
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0answers
47 views

Connecting 2 sections of a guest network using a pair of layer 3 switches

I have 2 subnets, these are physical sites which are connected with a point-to-point fibre link, 10.0.0.0/16 is our main site with our main gateway, 10.2.0.0/16 is the second site which sends all ...
0
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1answer
32 views

Linux kernel behavior when dealing with colliding subnets

I'm using openconnect to connect to my office VPN. They push some pretty crappy/aggressive routing rules allocating ALL of the private IP address spaces >.< After I connect to my office VPN, my ...
0
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1answer
72 views

Route traffic through private IP for only certain hosts - CentOS 6.6

I am having a weird problem which I cant figure out - so I was hoping someone here could give me a hand. First off the end goal is that a specific server in my network runs an IPSEC connection to ...
0
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1answer
25 views

High latency when enabling secondary BGP server for same networks?

I have two BGP servers on OpenBSD using bgpd that are located in the same DC; I tried to enable multihoming for the same networks on both of the servers, but upon doing so all hosts in that DC started ...
2
votes
2answers
43 views

New server unreachable for a time after swapping IP address

I am migrating nearly 20 websites from a win 2003 server to a win 2012 server. Both are VMware VM's, on different boxes, but in the same server room, and attached to the same switch. The 2003 server ...
0
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0answers
21 views

Postfix routing mail function recipient domain [duplicate]

i manage mails servers with Postfix and for one client I have delivery problems. So I want to say to Postfix "if mail are for this domain send them not whith the local smtp but with an other" wich one ...
1
vote
1answer
65 views

IPv6: differences between “routed prefix” and “link prefix”?

What are the exact differences between "routed prefix" and "link prefix" for IPv6?How do these differences in a wireshark-Trace? (if you observe a Host with an assigned "routed prefix" or a Host with ...
0
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0answers
27 views

How can i configure a static ipv6-prefix to one linux host [duplicate]

I have a virtual Linux server (Kubuntu 14.04) and i will ask the hosting provider for a complete /64-Prefix for this machine (at the moment i have 4 individual IPv6-Addresses). How do i configure the ...
0
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0answers
24 views

Centos internet sharing with dual WAN and subnet routing

Situation is like this: eth0 has internet access with VPN for 2 subnets 192.168.2.x nad 192.168.30.x eth1 has internet access eth2 is the one to be the connection to allow internet connection ...
0
votes
1answer
43 views

Return OpenVPN Internet clients' traffic to non-default gateway

At home I have an OpenVPN server which is at the same time an OpenVPN client. The purpose is to share one foreign IP address between several devices. In the local network everything works fine since ...
-1
votes
1answer
43 views

Routing between Two Host-Only Networks [closed]

I have two routers on VMWare workstation, Router01 and Router02, both are set up as Host Only Networks. I need to route between the two networks, so that from Router01 I can ping the public endpoint ...
-1
votes
1answer
33 views

Why must the IP be configured on the bridge device? [closed]

My understanding of a network bridge is having a kind of "virtual switch" which virtually connects the network devices (that were added to the bridge) as if I would connect them to a real switch with ...
2
votes
1answer
67 views

A local IP address (RFC 1918) on my network that is not … local

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
3
votes
3answers
40 views

Can't consistently ping both networks of multihomed host

I have a host which is multihomed, eth0 is on 172.31.254.0/24 and eth0.10 is on 172.31.253.0/24 . Obviously eth0.10 is a subinterface on vlan id 10. From this host I can succesfully ping hosts on ...
6
votes
2answers
679 views

Why isn't there a route for localhost in Ubuntu?

$ sudo docker run --rm ubuntu:14.04 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.17.42.1 0.0.0.0 UG ...
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votes
1answer
12 views

Addresses overlapping

I was putting somes static addresses to my interfaces then it shows me this: 172.16.1.0 overlaps with FastEthernet 0/0 What does it mean when two addresses overlaps and how can we avoid it? EDIT: ...
2
votes
0answers
30 views

How do I enforce preferential routes with BGP & Quagga?

I have two routers that I'm setting up currently and they will be feeding my network of servers with a private AS number provided by the datacentre. What I want to do is provide both a VRRP failover ...
0
votes
1answer
27 views

Cisco RV220W - No route to host between devices on the same subnet

I have a problem where devices cannot connect to each other using their respective IP addresses, but if a device uses it's own IP address it can connect. When you try and connect to a remote device ...
0
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2answers
64 views

setting up default-gateway on a router

So I've got this weird assignment, where each branch office has to be able to access the main office (and Internet) through a serial connection. Since switches don't have a serial connections ...
2
votes
0answers
36 views

Solving an asymetric HA Firewall/router

I have an old Linux HA firewall/router setup that never quite worked. As it was never quite put into true production (just testing and demo's), I always had to have one firewall shutdown to make it ...
0
votes
2answers
88 views

Linux Red-hat 6 Network manger interface priority

I have a question regarding RedHat 6 Enterprise Network Manager (NM): My Linux is connected to two network interfaces. 1 – eth0: Normal Ethernet which is connected to the company LAN 2 – eth1: An ...