A device that connects two or more networks and is capable of forwarding data packets to a destination based on information contained within a packet and internal routing tables.

learn more… | top users | synonyms (1)

22
votes
4answers
106k views

What's the maximum number of wifi connections for a single WiFi router?

We've got a Draytek 2829VN Wifi router and I'm wondering how many concurrent connections I should expect a router of this kind to cope with? We are looking to connect 60 iPads! I'd also be ...
19
votes
3answers
6k views

Slowest wireless client dictates the connection quality of all others?

Not sure if this is the place to ask this, but I couldn't find a more appropriate StackExchange site. I heard that the quality of wireless connection follows the law of the lowest common denominator - ...
14
votes
4answers
16k views

What's the difference between a switch, a router, and a modem?

What's the difference between a switch, a router, and a modem?
12
votes
3answers
2k views

Can you recommend a good intro to iptables? [closed]

I have to setup a firewall on a Linux server (all my previous experience is with Windows). My rules are meant to be pretty simple - forbid all, allow some ports with all, allow some ports for specific ...
41
votes
11answers
37k views

What is the difference between UDP and TCP?

My router has two protocols (and a "both" option) that I can select when setting up port forwarding: UDP and TCP. What is the difference between these two protocols and when would you select one over ...
3
votes
2answers
2k views

linux router setup

I a trying to setup a a linux router for the first time and i am struggling with the setup. Here how i want to setup it up: ISP line -> Linux router -> Linksys router -> Lan. Linux router has eth0 ...
4
votes
9answers
15k views

Best solution for Multi-WAN failover (inside & out)? [closed]

Looking for a way to setup 2 ISPs in failover mode, for both incoming & outgoing traffic, for our small (<100 devices) network. The leading contender for now seems to be the Peplink Balance ...
2
votes
1answer
662 views

How come I can't redirect TCP ports on this wireless router?

I am configuring a router to redirect TCP port 5900 (yes, this is for VNC) to a specific IP address on the network. Here is what I have: From a local computer on the same network, I can telnet to ...
2
votes
1answer
1k views

Multicast accross the subnets

My application sends some UDP packets on a multicast address. In our office we have 3 subnets connected via routers. Sitting in my subnet I'm able to ping the IP of the other subnet. Will multicast ...
2
votes
1answer
3k views

Is it possible to connect 2 networks with same IP range?

I have two networks with the same IP addresses in use and I need to connect them. I have a third network between the two to connect them but I need to know : - is it possible to communicate iof the ...
24
votes
11answers
14k views

Is anyone else using OpenBSD as a router in the enterprise? What hardware are you running it on? [closed]

We have an OpenBSD router at each of our locations, currently running on generic "homebrew" PC hardware in a 4U server case. Due to reliability concerns and space considerations we're looking at ...
10
votes
3answers
42k views

Bridging wlan0 to eth0

On arch Linux, I would like to mainly have eth0 (connected to bridged router) share the connection recieved from wlan0, Ive read tutorials but I'm not command sabby as other users are and don't ...
7
votes
4answers
7k views

Inexpensive, Reliable Captive Portal [closed]

I do some wifi hotspot installations, and a new client recently asked me if it would be possible to force users to his website when they first open their browsers. After some Googling I figured out ...
7
votes
7answers
4k views

How do you manage your Linux iptables configuration on a machine acting as a router?

I have a couple Linux machines that act as routers/firewalls for my networks and I have a script that runs all the iptables commands to set my rules. This seems to me like a really silly way to do it ...
5
votes
3answers
10k views

Cisco 877 as a VPN server?

I have a Cisco 877 router which connects my network to the Internet using an ADSL line, a single public IP address and NAT; the IOS version is 15. Everything is working ok, but I'd like to configure ...
0
votes
1answer
8k views

Using DD-WRT to connect to VPN and Forward all traffic of certain devices through VPN

I have been able to setup my dd-wrt router to connect to an openvpn server and route all traffic through the vpn to the internet. This makes it so all traffic comming in from the LAN to the ...
5
votes
3answers
5k views

Unable to connect on natted server from a host computer on the same LAN using public IP address

I have a server statically NAT’d using a registered IP address and it is accessible from the outside. The problem is I cannot access my server from the inside using the registered IP address with a ...
4
votes
2answers
10k views

QoS for Cisco Router to Prioritize Voice and Interactive Traffic

I have a Cisco 891W NATing Voice and Data to the internet over a 10mbit/2mbit connection. Voice traffic gets degraded when I upload large files. Pings time out as well. I tried to configure a QoS ...
1
vote
1answer
4k views

Linux split access (multiple internet connections w/ load balancing)

Short story: I've got a faulty cisco 1811 on my hands. It's a dual wan fixed configuration router. I had it setup with route maps to do load balancing. It works but every couple of hours it shits ...
9
votes
3answers
7k views

Is there danger to virtualizing a router?

I had read on a few forums about pfSense that said it was dangerous to virtualize pfSense. The reason that was stated was an attacker could use pfsense as a spring board for an attack on the ...
6
votes
4answers
3k views

Is Selling Old Cisco Routers a Security Issue?

I'm a system admin but I'm not Cisco certified and I'm not a network engineer. Basically I only use switches/routers/modems with a GUI. I've inherited a pile of old Cisco routers that are not in use ...
6
votes
9answers
20k views

Getting an IP's MAC address from behind a router

I want to know, if possible, how to get a MAC address of an IP address if I am behind a router. I tried doing a ping to the IP and checking the arp table, but the only entry is the router's MAC. Any ...
3
votes
11answers
2k views

Which hardware for an entreprise router/firewall/content filter/proxy on a single server [closed]

I have to set up a "secure" network for my boss. For now, I have a ADSL router linked to a switch. All users are connected to this switch. Security is obviously bad. I want to put a server between the ...
2
votes
2answers
2k views

Cisco Router - Website Doesn't Work Locally Because Public IP Directs to Router Itself!

I have an RV220W but this issue may apply to other Cisco routers. My website is deployed at public IP address 123.45.67.89/MyWebsite/Default.htm. My web server has an internal IP to which port ...
2
votes
4answers
3k views

Wireless router with vpn server [closed]

I'm searching for a WLAN (Wifi) Router that can be used as VPN server as well for my home office. Any good suggestions?
10
votes
6answers
8k views

monowall vs pfsense

I'm building a router out of a Mini-ITX pc + compact flash card setup and I'm trying to choose a suitable distro. My criteria are: Must be able to run from a CF card (so no excessive disk writes) I'...
9
votes
1answer
2k views

Limit ICMP Per Source IP with IPTables

I have mistakenly thought that the limit module is per source ip, but it appears to be based on all requests: 577 36987 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 ...
3
votes
3answers
868 views

how to connect 2 independent computer networks?

I have 2 independent networks that are connected to internet. Each systems in a network can connect to the internet through the corresponding router/NAT device. i wish to connect these two LANs. I am ...
2
votes
3answers
608 views

Forwarding hostheaders

I have a question about forwarding of the hostheader inside a network. My setup is this: - On the front I have a Linksys router - Behind the router I have 3-4 test webservers with different setups - ...
2
votes
4answers
12k views

How to properly nest a wireless router behind a wired router? [closed]

I wish to repurpose a wireless router to serve as a wireless access point behind a wired router (serving as gateway to WAN) so that I don't have to buy more hardware and recapture value on prior ...
2
votes
2answers
7k views

Restoring a Cisco router config using a config file

I'm working with a Cisco router over telnet (actually PuTTY), and I'm a newbie to ios. I'm slowly getting the hang of it, but have a very basic question: I have issued a show running-config command ...
1
vote
1answer
2k views

ESXi Behind Virtual Machine

Just as a follow-up to my previous question: I have an ESXi server that I'm moving into a colocation facility that supplies me a single IP address. I think I'm going to go the route of setting up a ...
1
vote
5answers
5k views

How to block external access to the DNS service running on a Cisco router?

I have a Cisco (877) router acting as the main gateway for a network; it has a DSL connection and performs NAT from the internal network to its external, public IP address. The router allows SSH ...
1
vote
3answers
221 views

Where to Learn CISCO Router Configuration

I'm looking for a course on learning how to use CISCO Commands to configure a Cisco router. Can someone advise me on how I might get started in learning this topic?
1
vote
2answers
1k views

How do I do IP Failover for my Public IP address with Linux HA

I did a lot of experiment with heartbeat, corosync and pacemaker for IP FailOver which I have to do with Public IP. I did more than one ip failover(VIPs) with two nodes, also with three nodes BUT ...
1
vote
2answers
1k views

Domain controller in cloud, how do we set up local BDC

We have a domain controller (exchange box) hosted at our hosting provider. We need to set up a local domain controller so we do a VPN and local authentication tasks. I can make the PDC accept all ...
-2
votes
3answers
1k views

D-Link Router “Virtual Servers” with 0.0.0.0 IPs [closed]

I recently erased all of the Virtual Server rules from a D-Link router and added just the ones that I needed (for example I don’t need DNS or NetMeeting, etc.) You can see the defaults on the emulator....
4
votes
3answers
4k views

How do I configure my router under another to avoid NAT issues?

I'm sorry if this has been answered before; I tried looking but couldn't find a solution. I'll try and explain as clearly as I can. I've recently purchased a Rogers Mobile Rocket Hub and it's ...
3
votes
6answers
3k views

Generating and capturing Netflow on a Linux router

We currently have a dual-NIC Ubuntu server at our data centre acting as the gateway router between our public networks and our ISP. We have a /30 cross connect network on the ISP-facing NIC, and one ...
2
votes
2answers
3k views

Best ADSL router with built in secure VPN? [closed]

What is the best adsl modem/router with a built in VPN service? How secure is this method with Windows XP clients? Will I be able to log into a Windows domain using this VPN method? Many thanks.
2
votes
1answer
119 views

A local IP address (RFC 1918) on my network that is not … local

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
2
votes
1answer
20k views

What is strict, moderate and open NAT?

NAT options on domestic routers often come configured as strict. What does this mean? What do moderate or open do? Port-forwarding/DMZ access works properly on strict so why bother with the other two? ...
2
votes
2answers
2k views

How can I team or balance two DSL connections? [duplicate]

Possible Duplicate: Is there a sensible way of ‘teaming’ two ADSL connections? WARNING: I am NOT a networking professional (obviously, see below) but I am a programmer and have a decent ...
1
vote
2answers
104 views

Question about port forwarding on router

How to forward from from port 222 to 22 inside local network to ip 192.168.1.103 for example? Have router TPL-Link TL-WR740N_V1 Setting allow to forward only outside port, but not for ip inside ...
1
vote
4answers
50k views

Help me understand the 'ip route' command for cisco routers

I just can't wrap my head around it. For example: I want the left-most router to be able to ping my computers on the left and vice-versa. Where would I set up ip route and to what address. I ...
1
vote
2answers
796 views

Multiple GRE NAT router

Does there exist a router that supports multiple GRE connections over NAT? Im currently running pfSense, and it only supports 1 at a time. I understand why, its just a drag as there are multiple ...
1
vote
2answers
3k views

Extremely slow NAT within a VMWare ESXi host using Linux VMs

I have a VMWare ESXi host attached to a fast network. The host runs two virtual machines: Gateway Client The gateway has two network interfaces, one that's bridged to the external network (...
1
vote
1answer
95 views

IP Address Alias

I have a computer behind router with IP 192.168.0.166. I would like to know if it possible to mask real WAN IP to it. So in the end it would be visible as WAN IP but actually not.
1
vote
3answers
502 views

Gateway and router on one computer

We have been attempting to setup a Linux/BSD/etc box that can behave as both an internet gateway and as a router. I don't know how to articulate our situation very well, so please forgive me... ...
1
vote
1answer
183 views

What router to choose between a 3620 and a 3640 to work with 3500 series switches?

This question is issued from the following: Will a Cisco 2514 router work properly with a Cisco Catalyst 3500 series switch? Following the inner requirements, I have searched for a more recent router....