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

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Routing packets from one interface to another while leaving untouched the default interface

I have a Raspberry Pi box with the following physical network interfaces: eth0 - built-in Ethernet, connected to my router's LAN wlan0 - built-in wlan, also connected to the LAN but unused wlan1 - ...
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18 views

Why am I having connection difficulties across two subnets? [on hold]

I'm attempting to wirelessly connect my neighbor's home network with mine. We each have our own internet services and subnets which we want to preserve, but still be able to access services between ...
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7 views

What is the maximum size of ISIS CSNP packet?

What could be the maximum length a single CSNP packet? https://www.cloudshark.org/captures/002cf25c04ba CSNP Packet capture
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8 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 ...
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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 ...
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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....
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1answer
56 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 ...
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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" ...
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28 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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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0answers
14 views

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

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
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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" ...
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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 ...
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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 ...
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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-...
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0answers
24 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....
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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 ...
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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 ...
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0answers
20 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:...
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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 ...
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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 ...
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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; ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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. ...
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32 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 ...
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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 ...
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0answers
18 views

iptables / routing - need to direct packets through a particular interface with frequent disconnects and default gateway changes

First and foremost, I did read this question iptables - Target to route packet to specific interface? and did my best to google, but so far can't figure out the solution. Problem: A linux machine (...
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0answers
59 views

openvpn: How to not use VPN for domains with multiple IP addresses

I want to route around openvpn for a specific domain. I have tried: allow-pull-fqdn route specificdomain.com 255.255.255.255 net_gateway But this simply does a DNS lookup of the domain and adds ...
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0answers
62 views

How to assign ipv6 to my kvm guests route mode

Do you know how assign ipv6 global addresses to my KVM Guests?My ISP provider advertise an ipv6 prefix /64.I use libvirtd an here is configuration. When i restart virbr0 cant communicate with local ...
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1answer
42 views

Linux routing not working

I got asus rt-n18u router and I want to setup vpn access from local network So I've isntalled optware and vpnc on the router and successfully created vpn connection on tun0 interface (ifconfig below)....
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1answer
28 views

Routing between openvpn interfaces/instances

I have 2 openvpn instances on one server (TCP and udp). One has clients in subnet 10.8.0.0/24 and another 10.8.1.0/24. Server IPs are 10.8.0.1 and 10.8.1.1: Is it possible to ping 10.8.0.2 client ...
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0answers
32 views

NO routing in VPN to client side

I try to configure the following network structure in one dev VMWare environment. W.XP------| |-----W10 192.168.5.100 | | 192.168.4.100 ...
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0answers
40 views

How to do Multi WAN routing based on latency/distance to the target IP

I have two different internet connections available (DSL & LTE), and I'm building a router to "combine" those. What I would like to achieve: The routing should happen based on the latency or ...
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0answers
37 views

Cannot ping wan gateway from cisco router

We recently had a new Ethernet connection installed and were given the WAN IP address, subnet mask and gateway needed for the connection e.g. IP 1.2.3.50 MASK /30 GW 1.2.3.49 When I put ...
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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 ...
1
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1answer
42 views

Procurve Inter VLAN Routing

I have a VLAN routing issue on our network. We have two ProCurve 5406zl's being used as our core switches, each vlan on these switches has an IP address and VRRP is configured on each vlan for ...
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3answers
54 views

Why another PC on lan can ping me even when I use /30 subnet?

Here is the set up: PC A : IP address : 192.168.1.2 Netmask : 255.255.255.252 Gateway: 192.168.1.1 PC B : IP address : 192.168.1.220 Netmask : 255.255.255.0 Gateway: 192.168.1.1 PC B is able to ...
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0answers
26 views

OpenWrt - connecting WLAN and LAN at network level 3

I have a Linksys WRT54GL router with OpenWrt installed. I would like to create two independent networks, each with its own DHCP server: one WLAN and one regular LAN using the switch ports. My /etc/...
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0answers
37 views

Routed AP openwrt

I am trying to use an Alice Gate2 as routed client to serve Internet connection to a smartTV via Ethernet. The network topology should be as follows: Internet -->(wired)-->[R1]---> (wireless)----> [...
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0answers
13 views

Route between E1 devices

I have this topology and I need to configure routing between my CISCO 2911 routers to connect my devices, that are using E1 without any timeslots separation.
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1answer
45 views

How to create a HTTPS Proxy?

I have to setup access to a remote API service in which requests are IP-Whitelisted. The problem I have is that my web-nodes are in the cloud and their IP addresses often change. Therefore I want to ...
1
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0answers
37 views

Cisco ASA 5505 Issue - “Flags SYN on interface..”

I've been trying to remotely configure a Cisco ASA 5505 in front of a dedicated server hosted with OVH. Unfortunately my qualifications and even experience very rarely touched on Firewalls. However I ...
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1answer
79 views

OpenVPN | How to make the server communicate to another server in LAN via OpenVPN gateway?

I've been trying my EC2 instance (OMD) to communicate to my LAN server (Raspberry Pi) via another EC2 instance (OpenVPN) but I can't make it work. The OMD server can ping the RPi but it can't connect ...