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.

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high ping6 latancy for cisco C3750

I have one cisco router with IOS software ( IOS Software, C3750 Software (C3750-IPSERVICESK9-M), Version 12.2(55)SE1). Recently, there is big ping latency, when I ping from one HP Gen6 SERVER which ...
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2answers
132 views

Switch in front of router - multiple public IPs

Network Gurus, This seems logical and doable but want to have an advice from experts. We have /26 on single drop in our datacenter. Some of our application servers (A) need public IP addresses and ...
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0answers
42 views

Ubuntu - Destination Host Unreachable Through Router / ARP Requests

Very strange issues on an Ubuntu server running DNS. Here is the network setup. There are two class C network ranges. Let's say they are: 216.107.249.0/24 216.107.250.0/24 Server is assigned an ...
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2answers
137 views

Dual stack linux router, can't forward IPv6 prefix

I have a small offic here with a few workstations and I would like to implement a small server for stuff like a proxy server, samba etc. This is the topology of said network: +-----+ dynamic +---...
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1answer
701 views

Can a Cisco SG300 Layer 3 Switch act as a NAT router?

I have following Network Setup: Basic Home Wifi Router ------------------------------------------------ | Cisco 2500 Series Wireless ...
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0answers
20 views

Cisco 1921 ISR K9 with Cisco 2620xm failover

I have a Cisco 1921 ISR and a Cisco 2600 Router (2620xm). The C1921 is the primary router on the corporate network. I would like the Cisco 2600 to connect to a module on the C1921 and provide 2 ...
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1answer
38 views

Windows Domain Network, Cisco 1921 ISR, and NTP

In an effort to make sure all Windows application that rely on time work (such as RDP), and to make sure logging between computers and router are using the same times, I would like to use NTP ...
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1answer
100 views

OpenWRT reroute all router traffic through a Client

I have an OpenWRT router (192.168.1.1) with various wired and wireless clients (192.168.1.x). One of the clients is a Suricata Sensor (192.168.1.100) with only one, 1000MBbit NIC. I want to ...
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1answer
43 views

Switch to Switch Communication with Static Routing

Before I ask any questions, here's a bit of an overview: Simple example of my network topology What I have in the diagram is two networks segregated by a point-to-point LOS system (the "towers") and ...
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2answers
58 views

Can a average computer configured as a router support any number of users (connected clients)? [closed]

I am planning to install a router for a rather big amount of users (50-100), and I have found home routers very unstable for this high number of devices. When researching, I have found this report ...
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2answers
355 views

Port-scanning on Cisco router with Nmap

I have Cisco 2911 router just booted with factory settings and no ACLs or NAT configured. All I did is turned on the interfaces and assigned IPs. I am trying to scan for open ports with Nmap, but the ...
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1answer
41 views

Merging multiple VPC's

I'm trying to merge multiple VPC's with site-to-site OpenVPN. I think it is almost successful but I face a strange behaviour. Here are the setting: VPC 1: 10.20.0.0/16 WebServer1: 10.20.49.147 (...
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1answer
35 views

Using our old internet connection as a failback access

We moved to another ISP recently, but we still keep our old plan too, which means we have one unused internet connection. We have netgear r8000 router on our old line, and an arris cable-modem/router ...
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0answers
57 views

iptables requires POSTROUTING for port forwarding

I have a very basic router/firewall running Ubuntu. I want to forward tcp connections on a specific port (443) to one of the machines in the local network. It has one interface to the outside world (...
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0answers
38 views

Router not routing from WAN to LAN or vice versa

I have purchased a Ubiquity EdgeRouter PoE and I am having trouble getting the Router to make routes. I configured the WAN port (eth1) with one of my static IPs that my ISP issued to me, I am able to ...
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2answers
62 views

How to secure network against connecting bad device with DHCP?

I have a network with 500+ computers, at my area there is lots of cooperation companies that sometimes bring their own routers. If they do it in sneaky way and do not turn off DHCP service on the ...
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votes
1answer
408 views

3 routers with three subnets to connect with each other without conflicts [closed]

I have a network environment with three routers: router #1 uses 192.168.1.x (TP-LINK TL-WR340G using it as switch) router #2 uses 192.168.3.x (SonicWALL TZ200 using it as DHCP and VPN) router #3 ...
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0answers
135 views

Limit odhcpd SLAAC / RA to specific MAC addresses

I am trying to set up my OpenWRT powered router to give me IPv6 connectivity via tunnelbroker.net (he.net). I am using OpenWrt Chaos Calmer 15.05-rc2. Creating the tunnel works fine, but I'd like to ...
4
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2answers
177 views

Clients unable to access certain websites, pages half loading, intermittent internet

All the PC's on my network are having trouble accessing a certain website (https://frontapp.com/) we need. The main page of the site will load partially, but the text and page will look strange. The '...
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1answer
64 views

How to find out from which switch is coming the exact MAC address

I am working on a big company with 2 Backbone routers (ARS9K) and 200+ switches (Cisco, D-link, Tp-Link and etc.). Lets say that I know an exact MAC address of a device, but I do not know to which of ...
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2answers
56 views

ESXi 5.5 Isolate Network [closed]

I have recently acquired a poweredge running esxi 5.5, and am creating a network for pentesting purposes. Currently my main network and the pentesting network are entirely seperate entities, having no ...
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1answer
63 views

Redirect all websites to a single webpage using iptables

I have a router which runs busybox, it has iptables so i wanted to redirect all webpages clients request to a single webpage. I cant use hosts file because the /etc folder is mounted as read-only. Is ...
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2answers
489 views

How to block internet access when the VPN stops on a DD-WRT router and separate VPN/direct clients?

I am using a DD-WRT 3.0 router to connect via openVPN. In the LAN, 192.168.1.50 is a device which should not go thru the VPN. (How do I set the firewall to have 192.168.1.50 not go thru VPN and How ...
2
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1answer
395 views

Possible Cisco Router Hack?

We have a Cisco EPC3928AD EuroDocsis 3.0 2-PORT Voice Gateway from our ISP. The router is connected to a firewall (an Ubuntu-box running iptables and Wireshark). Our LAN (10.0.0.1/24) is beyond the ...
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1answer
44 views

Router backup solution with USB [closed]

I have a router sitting at an external location. I'm looking for a solution to backup router logs at scheduled intervals, incrementally, over USB. Can someone recommend an intelligent external ...
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0answers
25 views

Support for Broadcast

I'm working on a research paper that may rely heavily on broadcasting. I've written a small prototype application to test broadcasting in a university setting, and everything works as expected. I've ...
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2answers
71 views

2 Lans, 1 router, need to ping eachother ip [closed]

I have 2 LANs: LAN 1 192.168.2.1/24 LAN 2 192.168.3.1/24 I have a device on tLAN 2 with IP-address 192.168.3.61. My laptop is on LAN 1 with 192.168.2.100. My final goal is to ping the device like ...
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2answers
34 views

HTTP/HTTPS routing according to URL [closed]

Hy everyone, I'm not a networking newbie, but a 'stackoverflow' newbie for sure, so I apologize in advice if i screwed-up category or group, but there seems that all this stuff is based on tags. I ...
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2answers
809 views

Do I need a managed switch for my home network? [closed]

The benefit to home routers is that all you need to do is plug them in, and they pretty much work out of the box, allowing multiple computers to use a single internet connection. Let's say I wanted ...
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1answer
74 views

Unable to connect to the internet with cisco 2911 using computer

It appears to be a NAT issue but I'm completely at a loss as to why this is not connecting. Cisco g0/0 192.168.42.5/24 <-> Wireless WAN: 192.168.42.1/24 Cisco g0/0 - shutdown Cisco g0/2 192.168....
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2answers
52 views

Common Practice for router setup in a business [closed]

At the company that I'm working for, we have one router (SonicWall TZ 210) and it occasionally go down during business hours. All I have to do to bring it back up is to power cycle the router but ...
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0answers
183 views

Tomato router killswitch using iptables

I have a tomato router setup with a VPN service. Everything works fine and I also have it that when the VPN drops it kills the connection so that any device connected to that router would never go ...
-3
votes
1answer
297 views

Seamless wireless AP network through wired routers [closed]

We have 3 open-space floors of 80 square meters each that we want to cover by the same wireless network in a big concrete building. We also have ethernet cables set up throughout all the floors. The ...
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0answers
155 views

Pinging across VPN tunnel

I have built a VPN tunnel between an Azure virtual network and Cisco 881 router. I have a virtual machine sitting on the Azure virtual network, but the router isn't able to ping the virtual machine. ...
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0answers
303 views

How to connect two switches with a router?

I am trying to learn computer networking by experimenting on cisco packet tracer. Here is what I have done, but I see that I cannot create a static route for it. The cisco packet tracer throws error - ...
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1answer
60 views

Can we prioritize devices connected to a Router

If a number of devices are connected to a router, can we prioritize them (PC - 1, Mobile - 2, Laptops - 3) by giving their MAC addresses. That way if everybody is working, depending upon their ...
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1answer
105 views

What does this Cisco Router firewall configuration mean?

I have a Cisco 881w that I have attempted to set up a very basic firewall on, but I am not convinced I have done this correctly. Below is the configuration pertaining to the firewall and access lists (...
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2answers
173 views

How can I configure a Netgear prosafe switch to route all network traffic?

I am setting up a small network and am out of my depth! Someone prior to me joining the team has bought the kit, now I'm attempting to configure it all to work. I have noticed that the network ...
-1
votes
1answer
39 views

Notation used in Router configuration diagrams

I was listening to an MPLS tutorial on youtube.MPLS tutorial I came across this diagram. I am not that familiar with router configuration.My questions are as follows. 1) what does G1/0, G2/0, G3/0 ...
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2answers
1k views

Is using beta dd-wrt firmware safe?

I upgraded from v24-sp1 (2013) to v3 beta (september 2015) as dd-wrt stable releases haven't been updated for two years. Are there any issues I should be aware of when using the beta builds? I need ...
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0answers
73 views

Intermittent Network Instability

I have an office network being run by a Linksys WRT1900AC, and I'm experiencing significant, but intermittent issues. I have between 15 and 20 devices connected to it, including computers, phones, ...
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1answer
40 views

Is this network implementation possible at all?

I'm currently working on a machine we will ship to many customers over the world that needs to connect to a single server, this is currently done over the internet but i'm thinking it would be easier ...
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0answers
30 views

ubuntu router intermittently times out

I have an ubuntu 14.04 server working as an internet gateway/router. When I run a continuous ping against a known good address on the internet, I get steady reply with good latency. But sometimes when ...
7
votes
1answer
661 views

Why is routing neither CPU nor memory intensive? [closed]

I've recently been examining the performance statistics of my linux-based router, and have been surprised by what I'm seeing. I expected the routing workload to be much more taxing to RAM and CPU than ...
0
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1answer
69 views

Ubuntu as router with squid

What i bassically want to do is use an ubuntu machine to act as my router but with squid to block some addresses. But i don't want to change user network settings. Explanation: Current configuration ...
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2answers
142 views

NOIP Static IP address resetting with router [closed]

I need a static IP address to access a client's website, which has a list of whitelisted IPs but rejects all others. This is great, except I have a Dynamic IP address and a Talk Talk router. I ...
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1answer
43 views

How would I access a Cisco router for configuration/management over the public internet

I want to connect a cisco router (2950 series) to my normal broadband router supplied by my ISP. I want to test whether I can access the router over the public internet for configuration/management. I ...
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1answer
62 views

Tomcat server port access

I have changed the tomcat default port to 8091 (eg. http://localhost:8091/project) which has been set up in intranet server and is working very fine within the network.I have to provide access to the ...
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0answers
74 views

Zentyal VPN site site : no ping

I try to finalize a Site to Site VPN Zentyal Here are my two networks: Site A: LAN users: 10.0.0.0/32 Zentyal server: 10.0.0.254 VPN server IP: 192.168.160.1 Customer VPN IP: 192 168 161 .3 ...
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0answers
36 views

IP Forwarding Configurations [closed]

I am testing ip forwarding to recieve external connections from my computer at home. I did the following from my router settings: Turned off firewall of router and fedora, done forwarding settings, ...