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

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309 views

Exchange 2010 org subdomain mail routing fail

I have a central setup with EX2010 and with a separate system as an edge transport, serving email addresses for aa.domain.com and domain.com. For some reason, this means I am unable to send email to ...
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827 views

How to use Ubuntu PPTPD as Gateway?

I just set up Poptop on our Ubuntu 10.04 server so we could use it as a VPN. I can connect to the LAN through PPTP but I can't use it a gateway (I needed to uncheck the "use default gateway on remote ...
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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 ...
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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, ...
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28 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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17 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 ...
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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 ...
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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 ...
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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 ...
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19 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 ...
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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 ...
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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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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 ...
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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:~ ...
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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 ...
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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 ...
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35 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 ...
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32 views

Different gateway per command

I have a network with multiple gateways and one is set as the default gateway on a server. I want a single specific command to use a separate gateway for all its traffic. How would I achieve that? ...
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20 views

Setup server hosting hyper-v as a router

I have a windows 2012 server hosting several windows VMs by hyper-V. As I was building this infrastructure at home all VMs got IPs assigned from my home router (DHCP). So both hyper-v manager and VMs ...
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19 views

Bizarre routing table name resolution issue with openvpn

I have been having some rather odd issues with my routing table. I am running a Debian Wheezy system, and for a while now, whenever I connect to my home wireless network AND my VPN server, (but not ...
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44 views

Vyatta or VyOS can support odd or even IP source routing or not

I tried to configure the even/odd policy for IP source routing in Vyattta/VyOS, but I get the below error message: Configuration error: "0.0.0.1/255.255.255.254" is not a valid IPv4 subnet ...
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10 views

Mikroti - route between 2 public adresses

I have 2 public addresses on mikrotik. Both using nat, but first is for normal users and second is for servers that I use on public network. I need to connect to second ip and services behind second ...
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55 views

Strongswan ipsec linux not passing traffic after established

I currently have two PFsense routers that connect over the WAN using a similar configuration and traffic is passed with no issue. I'm trying to set up a 2nd path over 4G WWAN and have to use linux ...
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15 views

Cannot connect two different networks on rhel6 on 2 virtual NIC's

I have a RHEL6 machine on VMware with 2 Virtual NIC's. The output of the ip's and networks are as below: $ ip a|grep "inet" inet 192.168.17.128/24 brd 192.168.17.255 scope global eth0 inet ...
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30 views

How to correctly setup Shorewall on VPN server connecting VPN clients to server's local network and vice versa?

I'm having some problems with my network setup. It looks something like this: The goal was to create a VPN server inside the local network that will a) Allow VPN clients to access local network ...
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12 views

ppp interface: Possible Route Issue

So, I've two machines with 3G cards, using the same carrier, and connected to 3G network using a specific APN. This APN is for a private customer network. Under both machines (linux), I used sakis3g ...
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22 views

Routing and VPN Setup

The network setup is as follows: Router: eth0 1.1.1.1 (outside) eth1 192.168.54.4 (inside) eth1 10.54.4.4 (inside) Cisco ASA5505 192.168.54.1 (inside) 10.54.4.1 ...
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34 views

OpenSwan IPSec tunnel not routing correctly

I am trying to enable site-to-site connectivity between my network and a Windows Azure network. I have configured openswan in the local network and service ipsec status reports that the tunnel is up ...
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24 views

Problems with route table with two nics on different subnets

I have an Ubuntu server with two NICs on two different vlans. Both nics are able to reach the internet. The server is an Ubuntu MAAS machine and therefore has pxe and dhcp and such. The DHCP server ...
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31 views

Openswan : Traffic not passing through tunnel

PLEASE HELP : whenever I ping one of the other site servers , the connection does not go through the other site public ip. the setup is as follows : Public gw ip of other site : 6.6.6.6 Server that ...
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34 views

Openswan VPN routing issue

I have configured the openswan VPN correctly on an EC2 server ( Elastic IP ), and it shows 2 tunnels up. Given the following setup : MY_PUBLIC_IP: x.x.x.193, MY_ENCRYPTION_DOMAIN: ...
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17 views

Why two network with NAToverload not communicate?

I have two private networks: 192.168.1.0 192.168.2.0 These networks communicate with each other via static routing, but when I set up the NAT overload, they don't communicate. Why? I examined the ...
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67 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
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13 views

isc-dhcp: provide routing option?

I wonder if it is possible to provide Windows port forward using isc-dhcp. In my company we have 2 internet connection and the first one is highly restrictive. So we cannot do FTP or SFTP on this ...
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37 views

ip rule not acting on fwmark

I'm trying to use iptables to load balance web traffic over multiple DSL lines by marking the packets and routing based on the mark. I'm working with CentOS 6.6, Kernel 2.6.32-504.16.2.el6.x86_64, ...
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29 views

Linux router showing packet loss

I have two linux boxes that are using a third box as a router. Packets flow normally. BoxA(10.0.0.10) -> (10.0.0.20) RouterBox (172.16.50.20) -> BoxB(172.16.50.30) When I run mtr from BoxA to BoxB the ...
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35 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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76 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 ...
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175 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 ...
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53 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 ...
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65 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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78 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 ...
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124 views

pfsense routing with dmz wan and sonic wall

Pfsense setup: 2 physical NIC's (1 input from modem/ISP, 1 LAN with a lot of vlans and DMZ) Network setup: WAN block from ISP xxx.xxx.xxx.225/28 Modem -> pfsense -> vlan 40 (192.168.40.0/24) ...
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74 views

Pass multicast packets between subnets. Which static routes need to be added?

I have searched forever but cannot find a clear instruction how to set this up. I have a router providing two LANs over bridges LAN 1 on 192.168.1.0/24, bridging two access points (2.5 and 5GHz) ...
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0answers
69 views

source based routing policy use ip route not works on my vm

I have an vm created with vmware. an installed centos 7 as os. the kernel is 3.x. now , my system have to network interface. and I want connect them to the same network. forexample : ...
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226 views

pfSense 2.2: HAProxy for HTTP + CARP + MultiWAN with VIPs issue (Outbound NAT?)

I have two pfSense firewalls with CARP setup, 2 WANs and HAProxy that points to HTTP servers in my LAN. Scheme: **pfSense server #1** ISP#1 - Public IP1.1 - pfSense#1 with HAProxy - HTTP ISP#2 - ...
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121 views

Windows Server 2012R2 Hyper-V Additional Public IP Subnet

I am using Ubiquti Hosting for a bare metal server. The server has a base IP address space of: Main IP: 24.79.37.82 Default Gateway: 24.79.37.81 Subnet Mask: 255.255.255.248 Usable Range: ...
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48 views

Route traffic based on source IP

I have two routers set up with different WAN IP's from different providers. Both routers have LAN IP's on the same subnet (10.2.2.x) and are connect to a switch. All hosts currently on the LAN subnet ...
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29 views

Auto modify all routes by a specific dev

I have to modify all routes using one specific dev. Not even modify, just append a correct src то the end of a route, like this: x.x.x.x(destination network) via y.y.y.y(MYDEV ip) dev MYDEV(network ...
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131 views

VPN to Windows Server 2012 on ec2 not routing

I have a Windows Server 2012 instance on EC2 so I can VPN into the private network to access machines not exposed via a public IP. I can connect to the Windows Server VPN by its public IP and ...