the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.
2
votes
3answers
518 views
Static-to-OSPF Route Redistribution
Is it possible to use redistribution of static-to-ospf in order to create an external OSPF route other than the type E2? Does this process only create a type 5 LSA and can any other LSA types be ...
2
votes
1answer
119 views
Can fragments of a packet be refragmented again?
In IPv4, fragmentation is done by routers on way to the destination if DF(do not fragment) flag is not set in the IP packet.
Once a packet is fragmented, its fragments may take different paths (due ...
2
votes
2answers
231 views
IPv6 Addresses causing Exchange Relay whitelists to fail
Several of our new Exchange servers are failing to relay messages because it is communicating over IPv6 and not matching any receive connector I previously set up. I'm not sure how we are using IP6 ...
2
votes
1answer
107 views
Two different networks with two different nameservers
On (Arch) Linux, I configured a VPN, which I do not want to use for all the traffic, but for the software that binds to the associated tun/tap interface. So far, with the help of iproute2's policy ...
2
votes
2answers
3k views
Is there a way to stop relaying network traffic through VPN?
I have been experimenting with VPN lately, and I managed to get it running on W7 PC. The problem is, though, that as soon as someone connects to my PC, the internet traffic from their PC is routed ...
2
votes
1answer
146 views
Cisco Router: select outbound gateway based on the source IP
I have a network which is currently using a Microtik AH493 as the edge device. This uses IPTable for routing and packet manipulation, and we're using policy routing to select the appropriate outbound ...
2
votes
4answers
1k views
Linux Ubuntu - Two NICs separate lan
I have this /etc/network/interfaces (IPs on eth1 are fake)
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.0.2.15
netmask 255.255.255.0
broadcast 10.0.2.255
gateway ...
2
votes
1answer
194 views
Building a custom Router
I need to create the network below:
Facts:
The router is a Linux box (don't care about the flavor), it has 2 NIC's.
The switch is unable to support VLAN's.
The servers need a WAN-IP. NAT is not ...
2
votes
2answers
799 views
How can I prevent OpenVPN from clobbering local route?
I have a local network on 192.168.1.0 with netmask 255.255.255.0. When I connect to a VPN though OpenVPN (as a client), it pushes a route for 192.168.1.0 that clobbers the existing one, making my ...
2
votes
5answers
2k views
How can I access an internal server using a dns path?
Our build server is hosted in our office, but is accessible from the outside via build.mydomain.com. I have a dns entry on rackspace that points to the office firewall which in turn forwards :80 ...
2
votes
2answers
2k views
Using Ubuntu 10.04 as access point
Is there an easy way to configure Ubuntu laptop as access point?
Sometimes when I only have cable connection to the internet I would like to give my gadgets access to the internet using WiFi. Is it ...
2
votes
1answer
717 views
Routing requests from external hostnames to internal IP addresses in Ubuntu
I want to host several websites using the same IP address. My ISP gives me one static IP address, however I have three different webservers (all running different sites) hooked up behind a cheap ...
2
votes
3answers
15k views
Source-based routing on Cisco 3750 switch?
I have this Cisco 3750 switch which handles many VLANs. It has an IP interface on some of them, and it does routing for those computers connected to those VLANs which use the switch's IP addresses as ...
2
votes
1answer
2k views
Marking packets with iptables with a NAT
I have to write bash scripts for a router to control bandwidth limitation for a given user on a given domain name.
For this, I'm using iptables to mark the packets incoming from a restricted domain ...
2
votes
2answers
1k views
How to change routing for skype packets?
I can't seem to find a way to somehow change routing for Skype packets.
I have following situation:
host ha, in lan, runs skype.
host ha has gateway "gw1"
gw1 has 2 separate network connections - ...
2
votes
4answers
1k views
Restrict VPN client traffic to certain domains/IP
Is there any way to restrict a VPN client to only route certain traffic via the VPN and the rest via their local gateway?
For example: traffic to a certain IP or domain gets routed across the VPN and ...
2
votes
5answers
183 views
Wireless Router
Is it possible to connect 60 user to internet using wireless router while having 3MB ADSL Line.
What the speed of internet the user will receive ?
if yes which router (Model ) will support this ...
2
votes
6answers
3k views
Cannot find Routing and Remote Access
I have a remote desktop server (Win XP SP3 German), and i need to configure a vpn. However, i cannot find Routing and remote access anywhere - I also tried with Start --> Run --> rrasmgmt.msc, but it ...
2
votes
3answers
3k views
Cisco - NAT causes nslookup to return local IP
A little background:
I have a server on my LAN that is statically NAT'd to its public IP in my Cisco 871. The rest of the same local subnet is statically NAT'd to a different Public IP, in order to ...
2
votes
1answer
360 views
IP Bridge for KVM with multiple subnets
I have a machine set up running KVM and a bridge on eth0 with the ip address for the machine. The machine has an IP address in a range with no more ip adresses free. I am trying to make a second ...
2
votes
2answers
2k views
second ip address on the same interface but on a different subnet
Is it possible in CentOS 5.7 64bit to have a second IP address on one interface (eg. eth0) - alias interface configuration - in a different subnet?
Here is the original config for eth0
more ...
2
votes
1answer
269 views
Cisco Catalyst 4500 Policy Based Routing
In order to test a new firewall I just set up I'm trying to implement policy based routing on our core switch. I want traffic from certain vlans to be routed to the new firewall while everything else ...
2
votes
1answer
136 views
Selective Routing Between Subnets
I have a configuration with two subnets. For this example I will call them 192.168.1.128/26 (128) and 192.168.1.64/26 (64). The 64 subnet contains all the internal devices that guests should not be ...
2
votes
3answers
8k views
iptables - Target to route packet to specific interface?
My home server has two main interfaces, eth1 (a standard internet connection) and tun0 (an OpenVPN tunnel). I'd like to use iptables to force all packets generated by a local process owned by UID ...
2
votes
1answer
584 views
Real server, Multiple IP Addresses, HyperV Virtual Server, How to partition IPs across real and Virtual NICs
This is a slightly difficult problem to explain without same basic background information - I'll try and refine the question later as necessary
Originally, I have a single hosted server (Win ...
2
votes
2answers
243 views
Connect one computer with a single network interface to two networks
This is my situation:
Network A: 172.16.0.x
Network B: 192.168.0.x
Server X: needs to access (and be reachable from) both networks.
Members of Network A should not be able to see members of ...
2
votes
1answer
100 views
VPN and physical IP routing [closed]
I was wondering how I would be able ( if possible ) to do this :
I have a physical machine in a data center with static IP's, I also have a home server who's IP gets reset every 36 hours by the ISP. ...
2
votes
2answers
724 views
Using RRAS to bridge two networks
I have the following setup:
Server A has two NIC's - one connected to each switch. Server B just has a NIC connected to the internal switch.
Server A and Server B can both ping each other. But ...
2
votes
3answers
314 views
Router in front of Untangle UTM
I want to put a pfSense router in front of my Untangle UTM. There is only one thing I am not too sure about.
If the Untangle box will sit behind another router and run OpenVPN, all I need to do to ...
2
votes
3answers
315 views
Linux router with 4 NICs not working
I'm setting up a Linux based router, with 4 NICs, and I can't seem to convince it to work, despite following steps suggested on various web sites.
Each interface is on a separate subnet as follows:
...
2
votes
3answers
2k views
Force Windows Local Subnet Traffic through a Gateway
We are attempting to route all traffic from a certain machine to a gateway. This works ok for traffic destined for subnets outside of the machine's subnet. However, traffic to machines in the same ...
2
votes
6answers
2k views
Route return traffic to correct gateway depending on service
On my office network I have two internet connections and one CentOS server running a website (HTTPS on port 443).
The website should be publicly accessible through the public IP of the first internet ...
2
votes
3answers
952 views
How to reinject the packet in the Iptables?
I have a packet inside a packet a.k.a tunneling. So essentially it's of the following form: [IP HEADER 1][IP HEADER 2][PAYLOAD] After reading the first header(done by a library) I will get the ...
2
votes
4answers
102 views
Intermittently uncommunicative subnets
Last week proved me a veritable Cassandra: I've always said that it's a bad idea to have only one firewall/router, without a backup or failover. And thus our Cisco PIX went haywire, refusing to route ...
2
votes
4answers
108 views
routing tables — dell powerswitch 2724
I was hoping to know if there is a way to direct all traffic to a specific url, to the server it corresponds to on our local network with out having to go out into the internet. It would be way more ...
2
votes
3answers
191 views
VNC connection to Windows XP
I have a Win XP work laptop with a VPN connection to our corporate network. The laptop is rather old and the screen is very small, so when at home I'd like to use it thru VNC (running Ubuntu).
I'm ...
2
votes
7answers
507 views
Can a Linksys Router be the cause of bad speeds on a 1.5 mbps link?
We use a Linksys 5-port router at a smal organization with about 20 employees. We recently acquired a 1.5 mbps fibre link, but sometimes the link goes down and speeds are still low. On enquirey from ...
2
votes
1answer
3k views
How do I setup routing for two companies with different Internet connections on the same LAN?
Here's the setup:
Two companies (A & B) share office space and a LAN. A 2nd ISP is brought in and company A wants its own Internet connection (ISP A) and company B wants its own Internet ...
2
votes
1answer
3k views
Routing traffic between home machines and remote machines over pfSense PPTP VPN…?
I'm having a bit of trouble routing my traffic through my VPN server. Basically I have a pfSense setup that works amazingly well for everything it's currently doing. However, now, I have need to set ...
2
votes
2answers
462 views
Static routes over multiple VPNs
We have employees using VPNs on Netgear routers to access the office. We also have VPNs set up so we can access some clients and our remotely hosted servers.
Where the system falls down is that our ...
2
votes
2answers
533 views
Exposing a private webserver box to Internet
How to expose one of my private network boxes which has a webserver to Internet?
More rigidly, box A has two interfaces: eth0 and tap1. eth0 is used to connect to ISP, my IP is 77.37.194.101. Box B ...
2
votes
2answers
3k views
FreeBSD load splitting and failover with 2 WANs (dynamic routing)
I have a freebsd server (ipfw, dhcp, dns) with one LAN interface and 2 WAN interfaces (2 different ADSL lines).
The WAN interfaces (re0 and re1) are aggregated into one lagg0 failover ...
2
votes
2answers
50 views
+100
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 ...
2
votes
1answer
40 views
Routing to enable pinging VPN server
I would like to be able to access the server network from the client with an establishedVPN connection on tun0. I've got the following setup:
Client (10.8.0.6 on tun0 and 172.28.220.95 on wlan)
VPN ...
2
votes
2answers
188 views
Can't reach network 192.168.100.0/24
In one of our data-centre we've a Debian machine acting as a router. From this network we cannot reach any of the machines found on 192.168.100.0/24 network. E.g The gateway on the 192.168.100.0/24 ...
2
votes
2answers
187 views
Routing to proxy and code injection into files served on local network
I'm trying to set up an Open Device Lab.
This question focuses on the network routing of and injection of code into the responses to requests made by the test devices.
I want people to be able to ...
2
votes
2answers
255 views
Routing problems to certain domains with PPTPD VPN setup
We've been struggling with some kind of network/routing issue with a PPTPD based VPN where the clients can't access certain internet domains/ips through the VPN. As an example, the user can browse ...
2
votes
2answers
80 views
Dial-in VPN Routing issue when on 192.168.x.x network range
I'm not an expert on networks but have a small office on the 192.168.x.x. range which is managed by a vigor (2800) router. I have enabled the VPN dial-in option on the router so I can get to the ...
2
votes
1answer
306 views
Routing between subnets on different vlans connected by a router/firewall
I have two networks that I'd like to connect with a router/firewall to filter traffic between the two. One network is on a public subnet, let's say 64.22.12.192/27 and the other network is on a ...
2
votes
1answer
639 views
Routes bound to virtual interfaces, Debian, and how to determine specifics, after the fact
I've recently begun a new job, and have inherited an existing infrastructure with a lot of issues.
One of the issues is that the previous admin added static routes to some servers, bound to virtual ...
