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

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1answer
36 views

cisco7200 router responds to icmp messages not addressed to it

I am trying to play (in GNS3 if that matters) with a very simple topology of three routers connected via hub. The time I am trying to ping from one of the router to another say R1 to R2. The R3 ...
0
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0answers
6 views

DD-WRT: WiFi in Client mode paired with routing's operating mode Router [on hold]

DD-WRT v3.0-r30082M Setup: Router 1 (home with Internet, 192.168.1.0/24), Router 2 (DD-WRT, 192.168.2.0/24) with connected to it LAN users. Goal: connect Router 2 to Router 1 via WiFi that the 2 ...
0
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0answers
7 views

Expose L2TP network inside OpenVPN

I have a L2TP permanent connection setup in RRAS within Windows Server 2012R2 and an OpenVPN service listening for inbound connections. I'd like that the OpenVPN clients to have access to the network ...
2
votes
1answer
4k 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 ...
0
votes
0answers
18 views

OSPF with VLAN and LAN

I have two Linux based router/firewall with Quagga installed. There are three physical interface connected. firewall one eth0 - WAN - 172.10.100.2/30 eth1 - LAN - 192.168.3/24 eth2 - wifi_lan 10....
1
vote
1answer
40 views

UDP multicast send/receive: Routing or socat issues?

I'm using 'socat' on Linux Centos 7 to diagnose some problems. Server and clients are all linux centos7, they all have multiple interfaces. Server 10.1.1.1 is on Switch 1, 10.1.1.2 is on Switch 2. ...
1
vote
1answer
39 views

Configure iptables on linux ubuntu to route only specific IP between two networks

I'm not a linux expert and I need to setup this scenario. I've an Hyper-V host where I have two virtual network interfaces, both of them are added to a linux ubuntu machine, eth0 and eth1. Now I ...
0
votes
1answer
3k 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 ...
0
votes
2answers
1k views

Application request routing and load balancing

I use Application request routing in my farm environnement. I got 2 ARR server and 2 IIS server in my farm. I configure my routing to load balance request even to my iis server, but when i look ...
0
votes
0answers
17 views

Cisco sg300 Home Lab Issues [on hold]

I have a lab with a VMware ESXi server, a client PC, and a Cisco SG300 with multiple VLANs configured in L3 mode. The PC is in VLAN 239 (the lab subnet), and the server is in VLAN 241 (the "server" ...
2
votes
1answer
40 views

Routing external traffic to a backup datacenter

I'm planning a backup data center and want all external hosts to transparently connect to DC2 if DC1 goes down. Assume I have public ip 1.1.1.1 at DC1, and public ip 2.2.2.2 at DC2. Obviously if ...
0
votes
1answer
24 views

Network Router “inside” and “outside” on the same switch and the same network

Is it necessary for a router, that inside and outside are on a different (sub-)net? As an example: We have the following setup in the field: Network: 10.10.1.0/28 R1: Router with R1.outside access ...
6
votes
4answers
4k 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 2ko/...
-3
votes
0answers
27 views

Route between two private networks [on hold]

I have a two private networks (home: 192.168.1.0/24 and virtual: 10.10.0.0/24) which I like to connect and have them to be reachable in both ways. Network home is managed by my home router which is ...
2
votes
1answer
3k 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
2k views

Allow access to printer between interfaces on Cisco ASA5510

I have a Cisco ASA5510 where we have to separate networks on two separate interfaces. The networks should have nothing to do with each other except that network B needs to access a printer on network ...
0
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0answers
19 views

failover IP always resolves to self from within self

Assume this setup with 2 servers: server A ip: 1.1.1.1 failover ip: 5.5.5.5 server B ip: 2.2.2.2 failover ip: 5.5.5.5 Each of the server has its own IP but also a common failover IP which ...
-1
votes
0answers
14 views

Will a router try to route traffic coming in from a mirror port? [on hold]

I am working on migrating an old bsd based firewall do a new solution. At first, we are going to migrate the firewall service to a new clustered set of machines running FreeBSD+PF. As the policy ...
2
votes
2answers
92 views

Server does not have internet access

My Windows Server 2012 network adapter is configured like this: 192.168.144.1 is my router address. From that same server this is the result of tracert google.com: The server's name is "VQ40DE" ...
0
votes
0answers
29 views

Running a router inside an OpenStack VM

I'm trying to make a router VM (actually an IPsec VPN server) inside OpenStack. The OpenStack is an installation of Mirantis 7 (why not newer? 8 from some reason causes kernel OOPS to the same image ...
1
vote
1answer
5k 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 ...
0
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0answers
14 views

Inverting an outbound rule in Routing and Remote Access does not function properly

I have a private network of a few virtual machines and a Windows Server 2012 virtual machine that is connected to the Internet and serves as a router in the private network. I want to allow only a ...
1
vote
0answers
23 views

iptables - POSTROUTING / SNAT doesn't change source IP (two routing tables)

I have a problem with iptables POSTROUTING rule, it seems that SNAT rule doesn't change source IP address. I would like set up the following system to route all traffic from LAN 2 through a VPN tunnel....
6
votes
5answers
12k views

Specifing ip address for outbound connections on a multi ip host

one of my servers (Debian 5.0.6) has two public ip-address on the same interface. This used to work well for months but suddenly it is using "the wrong" ip addresses for outgoing connections. This is ...
0
votes
1answer
19 views

Using AWS Nat Gateway from diferrent VPC across VPC peering

I would like to use Nat Gateway (not Nat Instance on EC2!) from another VPC to route my traffic from peered VPCs to the Internet. My infrastructure looks like this: /---------------------VPC-LIVECHAT-...
2
votes
0answers
16 views

Iptables don't load balance

I have consulted multiple tutorials to achieve load balancing over two internet connections. However, all traffic continues to get routed over the default route with the lowest metric, and I can't ...
0
votes
0answers
19 views

Forward connection from OpenStack VM to VPN client connected to another VM

The whole setup is a little bit complicated, but below is the rough layout (not very good at making these, hope it's not very confusing) : +---------+ +---------+ | | | Another | VPN Svc IP:...
0
votes
1answer
16 views

sendmail is not able to send outbound mail

I have set up a server and need sendmail for my Icinga monitoring. I installed sendmail and played around with it. I am not able to send files to a gmail account. My mail log is as follows: Jul 11 ...
5
votes
3answers
686 views

IPv6 and NAT, routing to multiple ISPs

Currently I have a nice setup using private IPv4 address space and uplinks from two ISPs to the Internet. Thanks to NAT I can just take down one of the interfaces and the Internet access is still ...
1
vote
1answer
2k views

Route IP from one vlan to another vlan in the same vrf of the same router

Can you route a IP (/32) from one vlan to another vlan in the same vrf of the same router ? Exemple: example_router#show version Cisco IOS Software, c7600s72033_rp Software (c7600s72033_rp-...
2
votes
2answers
1k views

How to find which routing protocol a router is using. And if found how to test it

I was recently asked a networking question in an interview which I did answer but the interviewer was not pleased. The question was : "Given an actively running router, how would you know what ...
0
votes
2answers
4k views

OpenVPN server on Windows 7 - How to route specific IP addresses to clients?

Okay, so I do not have a strong background per se in computing, nor networking, and I'm really just starting to learn this stuff now, for a relatively small family business of ours. It is rather ...
0
votes
1answer
26 views

OpenVPN: Only route a specific IP addresses through VPN?

I have installed OpenVPN with certificates using this tutorial: https://www.digitalocean.com/community/tutorials/how-to-setup-and-configure-an-openvpn-server-on-centos-7 and i use static ip adress ...
17
votes
5answers
2k views

Are people really going to use public IPv6 addresses on their private networks? [duplicate]

I have been reading the Debian System Administrator's Handbook, and I came across this passage in the gateway section: ...Note that NAT is only relevant for IPv4 and its limited address space; ...
2
votes
1answer
110 views

Is it possible (how?) to Route incoming UDP packets with one target IP to a destination IP that is resolved through a DNS query for a static URL?

I have a set of mobile devices that are configured to send UDP messages to an IP-address that is set in their SRAM. They don't have the capability to either store a URL, or resolve a URL to an IP ...
-1
votes
0answers
12 views

Two host communication on same gateway [duplicate]

I can't ping or enter any opened port on host which ip is for example: 125.45.47.44 My ip is: 125.45.47.22 those IPs (public IPs) provided by our ISP Gateway is: 125.45.47.1 On this IP: 125.45.47.44 ...
0
votes
1answer
41 views

How to pass request from one private network to the other, when client only connected to one network

I've a network topology on Azure which looks like this: Virtual Private Network A: address 10.0.0.0/16 Gateway: GatewaySubnet: 10.0.1.0/24 Public IP: dynamic Client IP range: 172.16.0.0/24 ...
1
vote
1answer
15 views

Configure iproute2 for multiple NICs and validating

In attempt to avoid split routing for a CentOS 6 server with multiple NICs, I am working on configuring iproute2 to direct traffic that originated from a particular NIC (VLAN) to return only via that ...
0
votes
1answer
58 views

How to use native ipv6 together with 6to4? I got lost packets

I've found that I can't run native IPV6 interface (at eth0) with 6to4 tunnel (at tun6to4) together. Here's my setup (/etc/network/interfaces/): auto eth0 auto bond0 iface eth0 inet static ...
0
votes
1answer
2k 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 ...
1
vote
4answers
2k views

Ubuntu Server, 2 Ethernet Devices, Same Gateway - Want to force internet traffic through 1 device (or at least allow it to work!)

I have a Ubuntu 10.04 Server with 2 ethernet devices, eth0 and eth1. eth0 has a static IP of 192.168.1.210 eth1 has a static IP if 192.168.1.211 The DHCP server (which also serves as the internet ...
1
vote
2answers
89 views

Access Point Iptable/Route rule for allowing device discovery? Devices can connect manually, but not automatically. Multicast/Upnp issue?

I setup a wireless access point on my server and for some reason, everything works but automatic discovery features. I can't see any other devices, upnp devives aren't discovered, and I think it's a ...
1
vote
1answer
54 views

IPTABLES - IP Restricted Port Forwarding for RDP

I can't find an answered question for this problem. I have about 7 ranges of IP address i would like to allow to RDP(port 3389) to a a server within my network. My main router uses iptables and i ...
0
votes
2answers
33 views

cisco 3850 in separate wiring closets - VSS?

I have two new 3850 24 port gig switches. I am putting one in the front wiring closet of our warehouse, the other in the rear. IS there a way to have these be a layer 2 / layer 3 Virtual Switch using ...
9
votes
2answers
50k views

Unable to set up a static host route - “SIOCADDRT: No such process”

At my office, there is a Windows Server 2008 router, 192.168.16.1, which is our default gateway. This sends data through our main internet connection. This works perfectly. 192.168.16.1 also has ...
0
votes
1answer
2k views

No internet access when toggling `redirect-gateway` in OpenVPN client config

I have a router with IP 192.168.1.1 subnetting 192.168.1.0/24. On that subnet, a Synology NAS has an IP of 192.168.1.181 and is running a VPN server using subnet 192.168.2.0/24. When I connect a ...
0
votes
0answers
28 views

Can IPv6 connectivity between countries be unreliable?

I’m setting up IPv6 on my existing VPS and backup server. The VPS is located in Fremont on Linode, and the backup server is located in New Zealand. I have several VPSs within the Fremont data center. ...
1
vote
1answer
3k views

How to get OpenVPN Client (Mikrotik RouterOS) <-> OpenVPN server (Debian/Linux) setup to work

I have some issues with making MT to work with OpenVPN server (Debian). I can make successfull connection to OVPN server, but traffic is not routed through OVPN server. Here is my configuration. ...
0
votes
0answers
12 views

Route to VM sub network

I have a problem routing the fraffic to my Hyper-v Vms. I have an hyper-V server in an private network environnement (deployed in a Vmware lab infrastructure) together with other Windows machines. I ...
0
votes
0answers
31 views

VPN tunnel via nas (synology) - how to route

I have two NAS (Synology) at two different locations, there is a PPTP tunnel between them. I also want to use the tunnel now for my other clients to connect to a server. Bridging the all of the ...