the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.
-1
votes
0answers
28 views
How are machines with globally routable addresses routed to behind other machines?
Say i have a machine that has the public ip 1.1.1.2, and it is connected to the internet via another machine, 1.1.1.1 . How do routers out on the internet know how to get packets to 1.1.1.2? I imagine ...
0
votes
0answers
14 views
Proxmox Network Configuration
i installed ProxMox on debian squeeze 64 bit , i follow the instruction and here we got at interface
Code:
# cat /etc/network/interfaces
# network interface settings
auto lo
iface lo inet loopback
...
1
vote
1answer
34 views
iptables: Allowing only established outgoing connections like DMZ
I want to simulate a DMZ like scenario where server1(inside DMZ, 10.1.1.0) should be able to respond to any incoming connection and cann't make a new outgoing connection on its own.
I would ...
-1
votes
1answer
44 views
Linux server not routing my packets
I have a linux server (Ubuntu 12) with 2 NIC's.
eth0 is connected WAN (inet 10.0.2.15 mask 255.255.255.0)
eth1 is connected LAN (inet 192.168.0.1 mask 255.255.255.0)
I want my windows machine to ...
0
votes
0answers
16 views
How do we apply different routing rules based on a http parameter? [duplicate]
I am trying to achieve something like this:
location /location1/{
proxy_pass http://localhost:8080;
}
location /location2/{
proxy_pass http://localhost:9595;
}
Now when a request comes in, ...
0
votes
1answer
9 views
failure discovery using LLDP
I have a array of switches connected to an Openflow controller.I want to understand the topology of the switches.I am thinking of using LLDP for this.Now in this architecture if a link goes down or a ...
0
votes
1answer
32 views
Why can't we contact a specific address range from inside our LAN?
We can't connect to a specific external server from inside our LAN.
However we can connect to the same server from outside our LAN, at home, or using a mobile phone. It was working just fine for ...
0
votes
1answer
24 views
Windows 2 NICs 2 Networks - Routing Issue
I have a Windows Server Box with 2 NICs sitting in 2 Networks with a Gateway Router to a 3rd:
e.g.:
A: 10.1.1.0/24 - Remote Network
B: 172.1.1.0/24 - "DMZ" with GW Router to Network A on IP 172.1.1.1
...
0
votes
2answers
26 views
Prevent internet access except for one server?
I want to see if the HTTP proxy support for an application is working correctly. In order to check this I have installed a Ubuntu VirtualBox on my Mac laptop and I want to configure the virtual ...
0
votes
1answer
26 views
RIP v2 summarisation
I am learning ccna, and doing some practice on packet tracer.
I have a simple network with two routers, R0 and R1. They are connected to each other through a serial link (172.16.56.128/30). R0 is ...
0
votes
1answer
16 views
openvpn routing setup for incoming connections on client
I have a debian server, call it A, that is connected as an openvpn client to another network. Server A is also http and email server accepting connections from the internet. Now, one of the servers on ...
1
vote
1answer
42 views
redistribution OSPF RIP of directly connected networks
I am trying to learn redistribution between RIP and OSPF.
I am using packet tracer.
I have one router BRANCH that is configured with RIP v2. On fa0/0 there is the network 172.16.56.0/25, on fa0/1 the ...
0
votes
1answer
42 views
iptables with DNAT and multiple gateways: How to route replies to correct gateway?
I have a problem setting up iptables rules and routes on a Linux client for a scenario with DNAT and multiple gateways:
We have two gateways to the Internet. The first has a fixed IP, the second ...
1
vote
1answer
71 views
How can I access my router that is on other office network
Hi I'm working on ROUTER A and I want to access ROUTER C, the config is:
ROUTER A <-conected with-> ROUTER B <-conected with-> ROUTER C
ROUTER A: LAN:192.168.1.1 255.255.255.0 ...
0
votes
0answers
24 views
How to test external IPv6 address from the same server
I'm using a server which is basically IPv4 only connected, but with help of Hurricane Electric tunnel it now also have an IPv6 address.
Now I want to regularly check this IPv6 connectivity by a ...
0
votes
1answer
39 views
Routing 4 Networks
I've been trying for almost a week to make it work but without success. I start to be hopeless.
I have 4 ethernet adapters :
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
...
2
votes
2answers
55 views
Why would IGMP and MLD be required to forward unregistered packets to all ports?
First, a little background: My understanding is that the purpose of IGMP (and its IPv6 cousin, MLD) is to avoid wasted bandwidth by ensuring that multicast packets only get transmitted to ...
0
votes
1answer
45 views
Unable to ping gateway from network
I got the following route table :
#!/bin/bash
IP=/sbin/ip
# SST
echo "SST: Setting up SST network ..."
$IP route flush table 10
$IP route add table 10 to 10.45.13.0/26 dev eth0
$IP route add table ...
0
votes
1answer
37 views
Why are there two types of ICMP Redirect?
Wikipedia lists 4 types of ICMP Redirect reasons:
0 Redirect for Network
1 Redirect for Host
2 Redirect for Type of Service and Network
3 Redirect for Type of Service and Host
I understand ...
0
votes
3answers
60 views
Default route and backup default route
Hi everyone I am a newbie so be patient please.
I am dealing with the following topology:
I have an "ISP ROUTER" connected via fastethernet to a MAIN router. "ISP ROUTER" is also connected via serial ...
0
votes
2answers
82 views
Centos 6.4: Networking issue - Unresponsive network. Cannot reach any external device
I had one server that was in production suddenly become no longer responsive w.r.t network. No settings have been changed in a while, so I don't really understand why it would go wrong. It looks like ...
-1
votes
1answer
17 views
How to connect three wireless nodes in Multi Hop ad-hoc mode? [closed]
I want to connect 3 nodes in "Multi Hop ad-hoc" mode in such a way that :-
Node N1 and N2 are in same network and N2 and N3 are in same network (N2 is intermediate node), such that:
N1 can send ...
0
votes
0answers
23 views
Loosing gateway setting when switching Hyper-V virtual lan to “external”
I have a 2008 R2 server running as a NAT-Router and Hyper-V Host.
NIC1 has the default gateway set to NIC2.
Using this setup everthing works and all clients can connect to the internet.
If I'm ...
0
votes
1answer
39 views
Traffic rerouting internally on LAN
I have a LAN with 10 PC's and 2 routers. One of the routers creates a secure connection to a different location. We do not rights to administer this router.The other router is my internet gateway.
I ...
0
votes
0answers
26 views
Bandwidth Management & Visibility at Network Border w/ Multiple WAN Links
There is a network that is designed as described below:
The ISP supplies a single physical link with 4 VLANs running to us through that link.
Each VLAN has a specific purpose, 3 of the VLANs will ...
0
votes
1answer
56 views
OpenVPN pass through to lan and out second internet connection
I asked on SuperUser, was told it might be best to ask on here, so here we go.
I want to run OpenVPN on a computer connected to a FiOS connection on one NIC, then pass that traffic onto the LAN, and ...
0
votes
1answer
16 views
OSPF LSA Group Pacing
Is LSA group pacing enabled by default in Cisco IOS or something that needs to be configured under the OSPF process? How do you determine if it is currently enabled or not?
-2
votes
0answers
57 views
How is IP traced actually? [closed]
I was always wondering how IP trace works.
I mean there are so many IP addresses over the world and when I request xxx.yyy.zzz.www for example, how the network exactly finds the (best) connection ...
1
vote
1answer
34 views
Debian Routing 4 Networks (2 ISP, 2 Local)
I got my two ISPs:
10.100.36.0/29
10.200.36.0/29
I got my two networks:
10.45.13.0/27
10.45.15.0/27
I am able to route 1 ISP to my network using my debian server. However, we now have 2 LANs ...
0
votes
1answer
26 views
Isolating Internet-accessible internal hosts from each other
I'm a sysadmin in a small company, and have what I would describe as a moderate understanding of networking. I'm trying to create a situation in which a number of internal hosts are accessible over ...
0
votes
0answers
18 views
IPSec configuration between a (Cisco) routed network and a (Racoon) NATed network?
I am trying to set up the following WAN configuration:
Both interfaces on the router at the datacenter connect to public networks. However, our office is behind a standard cable modem and is ...
1
vote
1answer
25 views
Debian routing with multiple connections
In the past I had my router at home (debian server) who was acting as a DHCP server, DNS server and NAT between Internet and my network. Now, I need to replicate this at the office where I work. ...
0
votes
0answers
32 views
Locating OSPF LSA Flooding In Wireshark
How can I identify the OSPF LSA flooding traffic which occurs every 30 minutes from a Wireshark capture? I'm finding it difficult to locate where the start and stop of this flooding process occurs in ...
0
votes
0answers
25 views
ASA 5505 Dedicate WAN Route to Voice Vlan
I've Got multiple WAN connections currently and I plan on moving towards a Active/standby Configuration in the near future, I have two asa 5505's with SecPlus licenses, the device is currently ...
1
vote
4answers
98 views
What does gateway mean in linux route table?
Does it mean the next hop of the route? Can the gateway be the next next hop, if there is an internal router in the private network?
1
vote
3answers
61 views
Cisco ASA Route command
I'm trying to route connections that are going outbound from my private network to an external IP via another host that is on my internal network.
Should the following work?
For example: External ...
1
vote
2answers
47 views
How do I route an external IP address to a internal one, from two different VLAN's? [D-link DGS-3324SR]
(Apologies in advance for not being an network savvy guy)
I have four VLAN's configured on a 24 port D-link DGS-3324SR. Each VLAN has 6 ports.
The first VLAN has a connection to a modem providing 16 ...
1
vote
0answers
84 views
OpenWrt on TL-WR1043ND - VLAN to VLAN communication
I have this network configuration at home:
3G Wifi router - for access to internet, 192.168.1.0 subnet
Router TP-Link TL-WR1043ND - OpenWRT (12.09), 192.168.2.0 subnet, connected wirelessly via ...
0
votes
0answers
70 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 ...
-1
votes
2answers
44 views
Single Static Public IP FAILOVER to Other PUBLIC IP Address
We have a customer that has a windows server located behind a dual wan router that has two static IP addresses from each ISP. They have staff out in the field that have laptops with applications that ...
0
votes
2answers
53 views
DSL routing - NAT Virtual server - port forwarding - static ip address
My NAT virtual server - port forwarding has been working fine up to the past couple of weeks.
All in a sudden, it doesn't work.
Setting was done as shown on the link:
I'm afraid it no longer ...
0
votes
0answers
31 views
How to solve different OpenVPN behaviour of 2 clients
TL;DR
I am trying to connect 2 machines to an OpenVPN system, with the same settings one client works and the other doesn't.
Situation
The server I'm trying to connect to is a pfSense based OpenVPN ...
-1
votes
1answer
30 views
i have 2 nics and i need to route a certain traffic to 1 nic [closed]
i have a pc with 2 nics installed and i want to utilize both, in my office table there's a 2 port patch panel.
1 port is for internet, and the other for internal access.
when both my nics are ...
0
votes
1answer
34 views
TCP/IP routing: accessing a LAN device with wrong static IP configuration
I forgot to change the static IP of a network device before moving it from my datacenter network to my home LAN. Since it isn't configured properly for my LAN network, I'm not sure how to access it.
...
1
vote
0answers
26 views
Iptables configuration to allow Steam Client [migrated]
I recently got and setup a small linux (Debian) router box. I'm adding it to an existing network to create a small subnet with specific properties, namely internet content filtering. I'm highjacking ...
0
votes
1answer
87 views
openvswitch: connecting two virtual private networks on two different machines with gre/ipsec
Here is the setup: We have a hardware (server) that presents a service to the customer (or "outside world", if you so will). Internally, the services and functions are distributed over several virtual ...
-1
votes
1answer
32 views
Policy based routing on a bridge interface
I'm currently setting up an Ubuntu 12.04 with 2 net interfaces. eth0 is on LAN_USERS (192.168.5.0/24) intended for user and eth1 is on LAN_INFRA (10.0.4.0) intended for management. Additionally, I've ...
1
vote
1answer
51 views
Routing to a floating IP between 2 servers on different networks
I have two servers in two different network subnets, there is a heartbeat between the servers and they automatically select active / standby. the active server will have a floating IP assigned to one ...
-1
votes
0answers
17 views
Routing issue from virtual machine in weird network situation [migrated]
I have a a bit complicated network topology
I have a router from my ISP with the network 100.0.0.0/24, the router's IP is 100.0.0.1
My own Linksys router has 100.0.0.2 plus 192.168.1.1 for my LAN
I ...
-1
votes
1answer
35 views
What ports do I need to forward (beside 3389) to make RDP work? [closed]
On my local network, I have 2 PCs, first one has RDP connections enabled (it's winserver 08). From the second one, I am successfully connecting to the first one (inside my LAN). But I need to enable ...
