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Questions tagged [router]

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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how to set up two routers so connected devices can communicate

I apologize in advanced, I'm new to this. My setup: Netgear Nighthawk AC1750 router 1: 192.168.1.1 Netgear Nighthawk AC1750 router 2: 192.168.2.1 router 1 has its WAN port plugged into my university's ...
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Linux LAN not connecting [on hold]

I got a new router. Windows connects to it without problems. Linux can't connect to it using IPv4. It broadcasts DHCP but no server responds. IPv6 is working. I need IPv4. Any help much appreciated.
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Internal home Powerline nodes and wireless bridges - can I delete all firewall rules? [on hold]

I have some home devices for Powerline ethernet and wireless bridging. They all are behind a main router that blocks out the outside world. On the power line nodes, I see a few things under iptables. ...
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36 views

ESXi 6.7 Connect two VM's on ESXi and connect them using router

I have an ESXi host installed on a VMware workstation. On the ESXi, I have two Ubuntu virtual machines and 1 freesco router. I want to connect both the Ubuntu virtual machines via the router. The ...
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Technicolor TG789vac - Cant open more than one port [duplicate]

I have been trying to open ports 7171 and 7172 on my Technicolor TG789vac router. But for some reason they are not being opened even tho I have added the rules on the router page. 80, 7171, 7172 ...
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29 views

One machine's network usage can increase latency for everyone sharing the same ethernet switch

I'm managing an office network of about 20 computers, which all share a common ethernet switch (unmanaged), which is then connected to the ISP's cable modem/router combo. Every now and then someone ...
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1answer
22 views

Converting a physical Windows partition into a VM for use with KVM, and then configuring the Windows VM as a router for my Linux host?

So bassically, I'm in year 11 and go to highschool. I have got a Linux laptop and asked them to connect Linux to their network (which they do for Windows/Mac computers). They didn't want to (it's not ...
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41 views

Port 8089 is blocked

I am trying to Port Forward 8089 and I am having quite a bit of trouble doing so! Looking for a possible hint at what I am doing incorrectly... I myself tried setting this up a number of times then a ...
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26 views

QOS Switch or Router

I have IP phones on my network along with computers on the same subnet. Traditionally, I would setup QoS on the router to give priority to the voice traffic over the data traffic. My question is ...
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16 views

Changing MTU in CentOS 6 DHCP server

I have a CentOS 6 server acting as a router with DHCP for my network. I need DHCP to tell all my devices to use MTU 1492 (instead of 1500). I already tried adding option interface-mtu 1492; in ...
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Debian Linux NAS server sometimes freezes my LAN (Debian v8.11 Jessie, OpenMediaVault 3.0.99 Erasmus NAS)

I have a NAS server, using Debian Linux sometimes freezes my LAN (Debian v8.11 Jessie, OpenMediaVault 3.0.99 Erasmus). Router: ASUS RT-N18U Sometimes when the whole NAS server freezes and at the ...
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13 views

unable to open http web console for tomato OS using reverse ssh tunnel

I have a tomato OS on my router. as the router is bedind a NAT, so i cannot access it using port forwarding (dont want to) , or any other way, the only way is to use ssh reverse tunnel. so i tried ...
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1answer
39 views

How to create a gretap tunnel between two AWS EC2 instances?

To create a tunnel between two machines connected to the same network, I can run the following commands: From host A: sudo ip link add gretap1 type gretap local HOST_A_IP remote HOST_B_IP sudo ip ...
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24 views

Openvpn dont forward internal subnet traffic

I'm using openvpn (with webmin and ubuntu 18.10) and the traffic is not forwarding between subnets =[ Openvpn is creating a route table with a wrong (i think) gateway I need 2 (or more) subnets with ...
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9 views

Traffic Shaping with Shorewall

I'd like to shape my network traffic according to the following rules: All traffic from one specific IP has lowest priority All HTTPS traffic shall have medium priority All SSH traffic shall have ...
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42 views

Strange network behaviour

I have following problem: In my company we have for our department a own subnet which is build as folloing: Company router --- ipfire --- [NAS (which handels DHCP), Storage Server, ...] The ...
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Aws routing table - Static routing

Amidst configuration of AWS routing table, AWS console allow static routing only. As mentioned here, every VPC has an implicit router. Assuming there is a public and private subnet configured ...
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2answers
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How to find a static IP and MAC address(or a device that reject any request like ping) on a network

I have a windows 10 PC and if I enable network discovery or set a static IP to the PC I'm not able to find it's IP address or MAC address from my OpenWRT router using arp table or dhcp.lease. Like I ...
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27 views

Add own Hop in Traceroute (LXC and Proxmox)

I have a dedicated server from the ovh company with the proxmox system installed and I have purchased several address classes for lxc. When I run traceroute to one of the LXC servers, everything ...
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19 views

Fedora client persist old address after router advertisement

I have a linux-based DSL router, running radvd Because the prefix from my ISP may change, so I have to change the radvd.conf when prefix changes. For example, like this. interface br-lan { ...
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1answer
58 views

How to interpret Firewall logs?

Today I have found few failed auth attempts on ssh server and I decided to check all logs for suspicious activity. Here are my router firewall logs (small part of it): Dec 12 21:24:12 kernel: DROP IN=...
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41 views

Linux equivalent of “no ICMP Unreachable” and “no ICMP Mask Reply”?

I have a Linux machine that is being used as a router. It has quagga installed and has ip forwarding enabled. It's forming an OSPF adjacency with a 3925 Cisco router. I'm being asked to ensure that ...
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25 views

can ping server but can't ping or join domain (DNS issue ?)

Like you can see in the title, I have a server with a LAN domain (+ DHCP/DNS, AD, FileServer). After a blackout, we had to reset our routeur and APs and since then, I can't access the domain with the ...
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If an echo from tunnel interface IP is successful but an echo from the tunnel interface source fails, is that an outage with ISP?

Trying to track down an outage. Our Cisco ASR has a tunnel configured as IP: 100.64.#.# Source: 192.#.#.# (Amazon DX block, this address is also configured as a loopback on another interface) ...
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1answer
75 views

Route traffic to the internet through router and Mikrotik firewall

I would like to request your help to understand whether my diagram is correct, at least conceptually. Im trying to set a network environment from almost scratch. We have a fixed IP provided by ISP. ...
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Establish VPN connection from a client behind a Debian router

EDIT : My searches leaded me to GRE packets : they seem to be exchanged on IP port (not TCP one) 47. It seems to be quite painful to handle it with iptables. So question become : how can I transmit ...
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49 views

Router's Parental Controls Really Block All Internet Traffics?

I am using Asus 4G-AC53U router. When I turn ON "Parental Controls" to block a client's Internet access, does the router really block ALL kinds of Internet traffics including system's service (such as ...
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73 views

Certificate Chain Issues in Draytek Vigor Router 2862

I have a Draytek Vigor 2862 that I am trying to configure SSL on. I have imported the Comodo Cert in as a Local Certificate, added the intermediate certificates as trusted certificates and then ...
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1answer
22 views

How do I run internet to my hardwired ethernet lines without putting the wireless router in a bad location?

I have a situation where a building was pre-wired for Ethernet (Cat-6, I believe). After some research, I believe if I wanted to run internet to all the cables that run to the rooms in the building, I ...
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50 views

How can I make an ACL list work within a LAN? [closed]

I added an ACL list to Router A and permission is working fine if the packet comes from another LAN. The problem is, when a Packet is sent within the LAN that is connected to Router A, the packet is ...
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There have the route in router, but I can not ping it

the network is 142.0.143.0/24, I can not from my Router to ping it. and I found there is a route of 142.0.0.0/20 which AS path is 1299 13576 I, I can not found the more detail network such as 142.0....
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37 views

Multiple routes from router advertisements

Consider the following simplified setup: All devices are IPv6 enabled. Interfaces are configured in a way that we have 3 networks as shown. Router advertisments are enabled on both routers R1 & ...
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1answer
65 views

Can not create sub-interface in Cisco CGR 1240

I follow a tutorial, there shows the method of create sub-interface: but in my actual situation, I can not do this: Router(config)#interface gigabitEthernet 2/1.100 ...
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1answer
179 views

Unable to redirect HTTP traffic to transparent proxy (Squid)

I'm trying to create a transparent proxy to cache and blacklist traffic on my self-made Linux router. Problem is that all clients are getting timed-out when trying to reach any HTTP sites (HTTPS works)...
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65 views

What's the meaning of `user-interface vty 0 4`?

In the Quidway AR 2220 router. What's the meaning of user-interface vty 0 4 and user-interface vty 16 20? [R4-ui-console0]display this [V200R003C00] # user-interface con 0 authentication-mode ...
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Is there an command for re-acquire Direct Protocol type routes?

How can I refresh the Direct protocol type Routes? I deleted one Direct Protocol type route from Quidway route-table. Is there an command for re-acquire Direct Protocol type routes? Destination/...
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60 views

Are there any types of switches that allow you to set custom network speed on their ports? [closed]

I know there are managed switches out there that allow you to hardcode the speed of their ports to 10/100/1000 Mb per second. But what if I want to set the speed to only 1 Mb per second or perhaps ...
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1answer
55 views

Can a router route local traffic through the WAN side to an AP bridge via VLANS on a switch?

I've been researching VLANs and advanced network setups, and I'm wondering if this could work. WAN | Switch (VLAN and QoS for ISP) | \ Gateway router Router(AP bridge mode) | ...
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83 views

Do I need routers in a LAN with 2-firewall DMZ solution? [closed]

I have a LAN that will host an EXTRANET site with 5 servers, and 2 exchange edge servers. The LAN will service an office in a 5 story building with about 100-200 users on each floor. Each floor will ...
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213 views

How can I duplicate incoming DNS packets and send them to a different nameserver with iptables?

EDIT: the tldr: I want to use TEE and NAT to clone UDP traffic. I'm not worried about handling responses. I ideally don't want to install new software. I am using TEE to send to local segment (127.0.0....
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58 views

Why is my firewall rule not being applied?

I'm having difficulty getting the firewall on a Draytek Vigor 3220 to pass incoming connections to port 25. I've set a rule to pass TCP packets from WAN to LAN from any source IP address and port to ...
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24 views

Why is my firewall rule being ignored?

I'm having difficulty getting the firewall on a Draytek Vigor 3220 to pass incoming connections to port 25. I've set a rule to pass TCP packets from WAN to LAN from any source IP address and port to ...
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52 views

Wireless to wireless (wireless server) terrible network performance

I have a server on a totally wireless network. PCs frequently disconnect and access to the server such as SQL query's and file transfers are painfully slow. Wireless to Wireless PCs <-wireless-&...
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Distribute a network in subnetworks [duplicate]

I am new to subnetting and still in learning phase, so I want to create 6 subnetworks from the following IP range 192.168.10.0/24 I have created the following subnetworks (since i need 6 so i ...
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Routing/NAT with Network Protocol Transformation

I'm looking for a way to accept multiple TCP based protocols on any port, then transform and redirect them all to HTTPS and send them over the internet to a server. (The "Server 1" is mine with ...
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2answers
38 views

Is there URL filter like protocol in TCP/IP stack?

I find many type routers have their self-existent URL filter settings. Tenda: Nexxt: So, is there a URL filter protocol in TCP/IP stack? and if is, is there any software for controlling every ...
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1answer
44 views

Multi router network and IPv6 DHCP/RA issues - How to assign default routers?

I've again got problems with our LAN. There are 4 WAN gateways all on the same subnet, all with 100M uplink. On IPv4 I advertise default routers using a ISC DHCP Server. On IPv6 there doesn't seem to ...
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163 views

what is a reverse nat and why would i need it?

Though I could find some definitions of reverse NAT (like from here), I couldn't really understand why it is needed. I'd really appreciate some examples.
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Software router - failover static route

To understand my question here is a brief explanation of the network setup: Two buildings 5.6KM appart. MS Server 2008 R2 at site 1. Other site has several PCs that need to RDP to the server. ...
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22 views

Pointers to debugging mid sized office wifi set-up

We have a mid-sized office network (45 employees, 6 rooms, 8 indoor and outdoor wifi aps and several network switches) which has a problem in its wifi setup. Wifi connections become 'stale' every 5-10 ...