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

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0answers
19 views

Router configuration for two WAN with the same ip range

I have the situation depicted in this diagram: I'm trying to route two WANs that are using the same class A IP network, and I cannot figure out which is the proper way of doing it. As a compromise ...
0
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21 views

How to prevent the pppd to remove the default route?

We use multiple providers, one of them to create connection uses pppoe through pppd daemon on ubuntu 14.04. Early without multiple providers pppd manages default route by itself (creating it when ...
2
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0answers
40 views

OpenVPN Access Server: Remote Subnet Cannot Access Client's Resources

I have OpenVPN Access Server running. Here's the configuration: 172.18.16.0/20 Client (172.18.16.101) ----- OpenVPN Server (172.16.0.0/20) | ...
0
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1answer
33 views

Setting up a virtual IP for high availablity [on hold]

Disclaimer; I'm completely new to server maintenance, availablity and clustering. I'm trying to achieve a high availablity server cluster configuration (failover, no load-balancing). I have two ...
1
vote
1answer
26 views

ssh from Server to Client through PPTP tunnel

I was able to set up a small PPTP VPN with a Server and two clients. All machines run Ubuntu 14.04. The connection works great and is reliable. I can ping all machines from everywhere. Also HTTP ...
0
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0answers
10 views

Issue Cisco PIM and multicast routing

I'm in the process or redesigning an IPTV headend that is running on mainly layer 2 (IGMP snooping) to layer 3 (Multicast routing using PIM Sparse mode), this will all be done mainly using cisco kit, ...
0
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1answer
31 views

OpenVPN and gateway on linux [on hold]

I have home server with Debian installed When I turn on openvpn it creates new interface - tun0 It also adds some routing rules for that interface, including 0.0.0.0/1 via 192.168.101.1 dev tun0, ...
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27 views

Machines disregarding default gateway

Our gateway is a router which redirects all browsing traffic to a proxy server (Ubuntu 14.04.3). Proxy server then process and sends the traffic back to the router through a different interface. Proxy ...
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0answers
9 views

Can't ping Subnet A from Subnet B with router between them [migrated]

I experimented with subnetting in my home network and Raspberry Pi. The ISP Cable Modem has 4 eth-interfaces and 1 wlan interface which all seem to be switched together. The routers IP is 192.168.0.1 ...
1
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0answers
35 views

Ping not reaching in OpenVpn clients to subnet and vice versa

I have a vpn server which is connected to vpn client having ip 10.30.0.x now. I want it to able to ping another private client connected to vpn server. Please note that other private client is private ...
0
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0answers
16 views

Cisco ASA 5505 access external IP address from internal

Got a bit of a head scratcher. ASA Version: 8.3(1) ASDM Version: 6.3(1) So I have an ASA 5505 with 3 interfaces (Inside, outside and Hosting). The inside interface has the IP range of 10.0.0.X and ...
0
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0answers
17 views

Changing source MAC address of routed packets

I have linux box with one network interface and IP forwarding enabled. Let's say my IP address is 192.168.1.1 and MAC is 11:11:11:11:11:11. When a packet which is not targeted for my host arrives, it ...
0
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0answers
40 views

Route Print shows Interface as “c”

We are having issues with servers that are losing their network access after reboot. When I was looking at route print, I noticed under the Interface it says C. Any idea what this is? Currently ...
0
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0answers
11 views

apache2 returning 403 for DELETE requests

I ran into a strange error with apache2 server. I have multiple virtualhosts configured for my web-app, and I am using context path to differentiate between different apps. All of a sudden, most ...
0
votes
1answer
28 views

Can't communicate out of VM instance for Modbus TCP/IP over port 8080 - routes poosibly required

I have used Google Cloud Developers Console to set up a Windows 2012 Server. I am trying to use this a web server for monitoring hardware utilising Modbus TCP/IP. I have installed a SCADA software ...
2
votes
1answer
23 views

Connecting two clients openvpn

I have two clients one connected to vpn server through vpn and another without vpn. I can ping both the clients from my server but I can't do directly using one client to another. I am adding route ...
3
votes
0answers
133 views

Linux device route without broadcast

I have the following setup: A network namespace, ns1 A pair of virtual interfaces, ns_ext1 and ns_int1. ns_ext exists in the global namespace, and ns_int1 exists in ns1. A GRE device, gre1, which ...
0
votes
1answer
33 views

Site - Site VPN using Zentyal (OpenVPN)

I've got some servers in location A which has a Zentyal machine running, lets call it Z1, I then have another Zentyal machine running in my AWS VPC, location B, lets call it Z2. Z1 is connected to Z2 ...
0
votes
1answer
26 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 ...
1
vote
1answer
27 views

Dest host dont accept UDP when there is no route to source

I have three hosts with following config: Host A: IP:192.168.1.1/24 Host B: IP:192.168.1.2/24 Host C: IP:192.168.3.1/24 Everything happens on CentOS 6, and all interfaces are VLAN tagged (if it ...
1
vote
1answer
56 views

Packets being routed to the wrong IP

Looked around, can't find a similar issue anywhere... I have been having some very strange and hard to explain problems on my network lately, and in my efforts to find the cause, I came across an ...
0
votes
2answers
76 views

Hyper-V host with one External IP address. How do I assign guest VMs an internal IP and configure NAT?

I've been struggling with this for a few days now, I've got a Hyper-V host with one statically configured external IP address. There is no DHCP server or internal network to retrieve an IP. How do I ...
0
votes
1answer
30 views

Iptables not routing GRE protocol

First things first, there might be a few English errors, considering it's not my native language. I'm having a problem with VPN(GRE protocol) passing through Iptables. I've done this at least a dozen ...
0
votes
2answers
38 views

Can I access a NAT addressed host behind a gateway from the WAN side without DNS or VPN (with DNS if it's not possible)?

I have a very simple gateway running a minimal Linux which is serving as an IP router with NAT and DHCP on the LAN, and a static IP on the WAN. The gateway router from the LAN side goes to a big ...
0
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0answers
18 views

why iptables SNAT doesn't help to answer ARP on the vlan tagged subnet?

I'm using iptables SNAT to setup a "router" on a linux box, it suppose to do NAT for 2 subnets. one untagged subnet 10.0.10.0/24, the other one is vlan tagged subnet 172.16.0.0/24. both subnet come ...
1
vote
1answer
88 views

Routing all traffc though OpenVPN on Windows

I have problems with routing ALL windows traffic thorough OpenVPN tunnel and tried to solve this issue for hours. However, most advices about it did not help in my situation. I have OpenVPN ...
3
votes
1answer
117 views

how to realize a traffic volume limit with linux

I am helping to organize a little conference. There is no internet connection, so we are limited to a mobile LTE connection with a limited volume. We have a Ubuntu-based server that acts as a router, ...
0
votes
1answer
26 views

Two-way routing for router and openvpn server subnets

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
5 views

Cannot disable return path filter on recent linux

I used to be able to disable all kind of return path filtering by just setting all the conf/*/rp_filter variables to 0 (one year ago, more or less). Now with a recent kernel (4.1) I don't seem to be ...
0
votes
1answer
16 views

How do I troubleshoot a VPN connection that won't forward DNS requests?

How do I troubleshoot a VPN connection that won't forward DNS requests? My network configuration without the VPN running works as desired. I have a Centos front-end NAT'ing outbound requests via ...
0
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0answers
23 views

Ubuntu multiple gateways

I have an OVH dedicated server, with multiple virtual machines. I have a pfsense firewall, and an ubuntu machine behind the firewall. So I had a failover IP set using the firewall as the default ...
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votes
1answer
10 views

Two network routing with CISCO 878

My company uses the 192.168.10.0/24 subnet and 192.168.10.235 is for all intents and purposes the gateway to the Internet. We have an extra VDSL line with a "home-style" modem/router that we want to ...
0
votes
1answer
32 views

How can i disable reverse path filter rp_filter in mac

I am following this Ubuntu Linux - two interfaces, same subnet, different vlan - MAC/ARP issues # sysctl -w net.ipv4.conf.eth1/102.rp_filter=0 # sysctl -w net.ipv4.conf.eth1/103.rp_filter=0 But ...
1
vote
1answer
43 views

Windows Dual NIC - Will this setup cause an ip address conflict?

My company has three subnets total of which two subnets have the same set of ip addresses... 192.168.0.x. This has not been an issue before but we are going to establish a VPN connection between ...
0
votes
2answers
30 views

iptables forwarding ignored

I'm having an issue forwarding traffic from one interface to another. It seems my forwarding rules are not being respected. sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 1 Here's how my IPtable ...
2
votes
1answer
35 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 ...
0
votes
1answer
65 views

How to Route certain traffic to a VPN and else to the internet

I currently have a linux server with fedora 22, which I intend to use as a router, and right now I have openswan conected with ipsec to a remote fortigate 60c, what I would like to know is how to go ...
1
vote
2answers
28 views

connect to server in seperated lan (using openwrt)

I am using openwrt with the following setup: --------------- | |--- LAN1 192.168.1.1/24 WAN 194.X.X.X ---| openwrt-box | ...
0
votes
0answers
24 views

How to route multicast traffic under Ubutun 14.04

I am trying to achieve a very simple goal here, which is to set up a iperf server on my desktop machine to receive any incoming traffic, joe@longbeach:~$ iperf -s -u -B 224.0.0.1 -i 1 ...
0
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0answers
54 views

Ping is happening but arp is not resolved

I am seeing one interesting problem. I have setup two devices connected through lan cable over eth3 interface. Now a vlan session has been created on both the interfaces. Device 2: root@10:~ ...
1
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0answers
34 views

forward vpn traffic from tun1 to tun0

I've been banging my head on this for a while and gave up trying to figure it out. My knowledge about routing and iptables is just too limited to understand this it seems. I have configured a split ...
0
votes
1answer
112 views

Is there a cloud-based reverse proxy solution in AWS?

The system I have an API deployed on EC2 machines on AWS. Incoming HTTPS requests are passed to an elastic load balancer. The load balancer handles the SSL, and passes the request to an Nginx ...
0
votes
1answer
19 views

Reverse proxy requests based on http:// or ws:// in request header

From a previously asked question I know that I can route requests to a different servers with reverse proxy, such as mod_proxy for apache. My question is, before I dig deeper into its setup, which of ...
0
votes
1answer
37 views

Redirecting Public IPs to jails

My plan is to set up a server where I have several jails. Currently, I am planning on running three of them: a webserver, an owncloud server and a Teamspeak 3 server. I got it running so far that I ...
0
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1answer
43 views

Route HTTP(S) traffic to specific IP based on requested URL on Linux

I have an Ubuntu Server in the cloud. Let's call it ServerA. ServerA has an apache2 installed and is serving a default page on HTTP requests. mydomain.com is pointing to the ServerA's IP and thus the ...
2
votes
1answer
70 views

How to get local ip address associated with default gateway

There may be several network interfaces on a server, e.g., lo, eth0, eth1 From the route table, I know that eth0 is connected to the default gateway. The address of the default gateway, for example, ...
0
votes
0answers
20 views

Getting server to reply to client via either network (they can see each other in multiple networks)

I have multiple internal networks, each of them also corresponding to a different VLAN. There's a firewall that acts as the gateway for everyone on every network. It has multiple interfaces, one on ...
0
votes
0answers
13 views

use of secondary public IP subnet in Sonicwall NSA firewalls

I have a Sonicwall NSA 3500/4500 firewall. I have a primary block of public IP addresses that are working fine but I need to utilize a second block of IPs that are routing over the primary from the ...
0
votes
1answer
53 views

Linux virtual server, direct routing (LVS/DR) on VPN

Is it possible to set up Linux Virtual Server on VPN? The real servers should lie on the same LAN segment. I want the real server to be a non-LAN server connected to the Internet. Could it be ...
0
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0answers
33 views

Dnsmasq , redirect all but google.com

My router uses dnsmasq. In my dnsmasq.conf, I write: address=/#/127.0.0.1 in order to resolv any domain to my local server. It works. Now I'd like to make possible to join www.google.com. Any other ...