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

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7 views

Use a specific outbound IP address with a Docker container

I have a Docker container named worker and 2 IPs routed on my server. The first one is used by eth0, so it's also the IP used by worker. I can see it by doing something like curl ipinfo.io/ip (inside ...
-1
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1answer
37 views

Sharing a WAN connection between 3 companies

I have been asked to install a network to share a BT fibre connection between three unrelated companies. The WAN is presented on a cisco 2900 series router (managed by the ISP) with a gateway address ...
2
votes
1answer
2k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
0
votes
1answer
31 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
votes
1answer
20 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 ...
4
votes
1answer
4k views

Routing between two routers with static routes

I have a Draytek 3200 router and a pfsense rackmount router that I am trying to get to route to each other. I have a subnet on each router and a subnet for the link between, as shown here: As it ...
5
votes
4answers
3k views

Openvpn, forward packets very slowly

I rebooted my server, and an odd issue just came out. I am running on ArchLinux, the clients are Ubuntu, Android and Mac. The problem is that accessing the internet via the clients is slow, about ...
3
votes
1answer
2k views

Windows Server 2008 R2 RAS VPN: access server on internal interface ip

short question: I'm usually a linux admin but need to setup a Win2k8 R2 server for a student project. The server is running as VM on a root server and has a public internet IP assigned. Additionally I ...
0
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3answers
58 views

Assign IPs to programs/processes

I need to assign different IP addresses to different processes (mostly PHP & Ruby programs) running on my Linux server. They will be making queries to various servers, including the situation ...
0
votes
1answer
26 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 ...
2
votes
1answer
259 views

Can't SSH in to AWS VPC second ENI from with in same VPC

I attached a Second ENI to my Ubuntu OS machine on AWS VPC, the internal IP of this new ENI is 192.168.12.24. When I try to SSH in to this machine from another machine in the same VPC I get a ...
0
votes
1answer
24 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 ...
2
votes
2answers
37 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
votes
0answers
20 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 ...
-2
votes
0answers
32 views

Is this routing configuration possible

I have three interfaces, which mostly will be used for receiving data, and many other interfaces, which mostly be used to send data. Also, frames from first three interfaces should be vlan tagged and ...
0
votes
1answer
1k views

Configuring Shorewall for routed OpenVPN

I have an Ubuntu server 14.04 machine that serves as a NAT router. The routing is achieved using Shorewall, mostly in line with this tutorial. The LAN has the subnet 10.0.0.0/24 On this machine I ...
1
vote
1answer
52 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 ...
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0answers
11 views

Dual wan ubuntu router [closed]

I would like to configure a ubuntu server with two ISP and one lan with two network; say 192.168.1.1 and 192.168.2.1. 192.168.1.1 n/w should route through ISP one and 192.168.2.1 n/w should route ...
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0answers
12 views

Route traffic to internal device on local address for internal clients

There is no DNS server at the site, so the URL is always resolved to an external address on the Firewall. Hence traffic originates on the local network, goes out the firewall and cannot connect to the ...
0
votes
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
votes
4answers
6k views

Allowing inside traffic to outside on ASA 5505

We have an ASA 5505 with an inside interface 10.22.33.0/24 and outside x.x.x.x/26. The inside ip's are obviously private and the outside ip's are public. I've been able to set up a nat rule to route ...
0
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0answers
12 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
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2answers
2k views

cisco ip nat / port forwarding

I have been trying to get port forwarding working with a newly installed cisco router. I cannot seem to find where my fault is and have been looking for quite a while. The relevant section of my ...
-1
votes
1answer
34 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 ...
3
votes
3answers
32 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 ...
0
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2answers
1k views

Routing between multiple Mikrotik Firewalls

I have 2 Miktorik RouterBoards, an RB1100 and a RB951G. The 951G is acting as my Wireless box, and has Guest, Internal and Internet Only Wireless networks. The RB1100 has 3 WAN connections (2x150/10Mb ...
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votes
1answer
28 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
59 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 ...
19
votes
3answers
32k views

How to reload default Mac OSX routing table without rebooting

Greetings, I'm using vpnc for a VPN client. I'm also doing some tricky things with route to make sure I can still access my local network, etc. etc. (the particulars here are not very important). ...
6
votes
2answers
629 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
11 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: ...
0
votes
1answer
2k views

strongswan VPN on OpenWrt

Hi I'm running Barrier Breaker version of OpenWRT and I have setup a VPN according to: http://wiki.openwrt.org/inbox/strongswan.howto I can connect to the VPN with my iPhone or Mac (to 10.10.1.0/24 ...
2
votes
0answers
19 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
2answers
34 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 ...
0
votes
1answer
29 views

How do I use CSF to redirect domain requests to a port?

I have a server setup that uses two different webservers with different subdomains. Right now the servers listen on different ports (80 & 4000) So users don't have to put in :4000 I'd like to ...
0
votes
1answer
17 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
votes
2answers
58 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 ...
2
votes
0answers
26 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 ...
1
vote
0answers
42 views

Cannot Reach Secondary Subnet on Same Interface

I am running a Cisco 1841 which has an unmanaged Dell 2848 connected to it. Connected to a WIC card in the 1841 is a fiber run which goes to a subnet of devices. The primary subnet is 192.168.2.0/24, ...
0
votes
1answer
30 views

Change source IP for specific target host

This is a follow up to this question of me. (Still on Debian 7.8) The problem isn't really IPSec related or anything, because I can't even ping the remote host with the "correct" source IP (through ...
-1
votes
1answer
22 views

enable ip forward with specific port

I have two servers the first one under Linux (Amazon Linux) server with two network card eth0 (IP 1.1.1.1), and eth1 (IP 2.2.2.2), and the second one under Windows server 2008 R2 (IP 3.3.3.3 install ...
-1
votes
0answers
12 views

After restart routing does not work

Every time my windows 2008 R2 server restart, routing in my network stop working. I can acces to server remotley from internet but not from network, cannot even ping any pc in network. We found ...
0
votes
1answer
3k views

How to route traffic over an active VPN tunnel by domain name?

I set up a VPN tunnel to my web server targetting its FQDN: (e.g. my.server.com) using the built-in Windows 7 VPN feature and the built-in Windows 8 Routing and Remote Access (RRAS) VPN feature. How ...
1
vote
1answer
37 views

How do I connect multiple subnets together?

I am not a networks expert, I have a basic knowledge of networking. In my workplace I have 3 dsl routers with different subnets (192.168.0.0, 192.168.1.0, 192.168.2.0). They are connected to a ...
1
vote
4answers
129 views

Cisco ASA Implicit rule dropping traffic

The network is as follows: Two Default Gateways exist on the network - one which provides connectivity to the an MPLS with several subnets. Let's say 10.0.0.2 Another which is a Cisco Firewall, on ...
0
votes
1answer
31 views

ipv6 static routing is not working

wondering ipv6 static route default route nothing working, only can ping the directly connected interface, but sh run command gave the static routes which I created to other networks, but on the sh ...
2
votes
1answer
4k views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
1
vote
2answers
44 views

How to use a server as a “tunnel” in between the clients and the router, in a small network?

Consider a small network with 1 router (192.168.1.1) and clients (192.168.1.x). The router (OpenWRT) provides Ethernet LAN and WiFi for the clients, to connect to the Internet. Now, I want to use a ...
2
votes
1answer
2k views

Fortigate VPN Routing issue

I have 200B Fortigate unit with 2 internet WAN connections. I also have a remote site which I'm connected to via IPSEC VPN through WAN1. This site has only one GW IP address. I'd also like to setup a ...
1
vote
0answers
26 views

How to Route google apps gmail based on subject line?

I set up a bunch of routes in my new google apps system (migrating from doing inbound email with mailgun forwarding). In one case we need to forward all email with a particular subject to another ...