Questions tagged [network-access]
One of the three layers of network design. The main characteristics of the network access layer is that it provides the access point for devices connecting to the network at a reduced "cost-per-port".
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how do I fight/ protect and gather evidence if my router was copy Mac and my Mac was ported? [closed]
I learned recently that my devices including router had it's Mac address copied multiple times. I believe I'm going through a network hacking that uses the Mac addresses to drown my network services. ...
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Static NAT and PAT
I have two private IP addresses, want to make them NAT to 203.0.113.0/2 public IP address.
WAY 1 : Static NAT (2 ip addresses NATted to one by manually)
WAY 2 : PAT (Router gives port number ...
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Cisco ASA access-lists and net config
Here are my config to this network. I found the ASA doesn’t ping through each other. Also, when I type show crypto isakmp SA and IPSec Sa, it doesn’t show anything at all. Could you guys find what’s ...
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Cisco ASA VPN disconnecting regularly random time
We have Cisco ASA VPN IPSec with Sonicwall but we are seeing randomly after 8 hours or sometime 10 hours. I am unable to trace issue so just wonder is there a simple setting to renegotiate tunnel ...
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Does sharing laptop Wi-Fi cause network noises or network slow down?
We have network (Wifi network) issues in our organization the network is slow and sometimes the access point throw out some connected users. We contacted ISP and they checked our network configuration ...
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Why need Ack flag if we already have ack number in TCP
If we have ack number so from there we can trace that how many bytes are received and which byte is need next so then what is the use of Ack flag there?
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pfSense join 2 networks
I've got 2 pfsense boxes taking care of separate networks, with separate gateways. We've managed to drop a cable between the 2 networks so would now like to join the 2 networks so machines on each ...
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How is P actually chosen in P-persistent CSMA?
I am struggling to understand how the probability value P is chosen for P-persistent CSMA for any particular station, what's the logic behind this.I have read from Wikipedia .
P-persistent
This ...
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How to create a network with many access points or repeaters and guest access
I have an existing simple network with internet connectivity.
We have four access points that do not offer true guest access.
We would like to have four access points that offer wireless for the ...
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Why must host A continue to transmit after host b sends runt frame post collision on ethernet? (CSMA/CD)
Trying to understand example from computer networks: a systems approach ...
-Host A sends Host B a frame at time t;
Packet arrives at B at time t + d; (d = one link latency)
Instant before frame ...
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What is a "routable" IP? [closed]
Short bg:
I wanted to host a website on my laptop (192.168.0.102) via apache server. I set up port 8080 and forwarded the port that I was able to access it via 192.168.0.102:8080. Then there was a ...
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protection method that you need to know exact 3 or more ports to access network
long time ago i found an wiki article for method that protect your network from unwanted access.
method was something like:
attacker need to know 2, 3 or more exact ports which are open to access the ...
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Do DSLAM and OLT function like a switch?
Let's say for example we have the following hypothetical topology:
In each network, can each user communicate with each other?
For example, can User 1 ping User 2?
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Spoofing the L2/L3 information and replication across L2
Could I have a server that spoof the same IP/MAC address of my server on the same L2 network that:
1 - does not do any conflict on the network.
2 - And on the same time when capturing packets on my ...
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Assigning a single switchport to different VLANs
I've been trying to figure out how to achieve the outcome below.
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
...
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Linux networking + mix of auto-negotiation of yes/no [closed]
we have 10 servers with Advertised auto-negotiation: yes
as
the machines with driver driver: i40e
driver: i40e
version: 2.3.2-k
firmware-version: 10.51.5
expansion-rom-version:
bus-info: 0000:12:00.0
...
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Network ( routing and switching) , security
In my company network i am installing new cisco2811 router but i have problem, my LAN network can not ping and access network. i get point to point internet from ISP.
PTP IP is 192.186.86.200/24 and ...
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What are limiting factors of Ethernet payload size regarding the future of internet traffic?
The ethernet payload is 1500 bytes. Devices have to deal with a huge number of frames, where many are fragments of one and the same message. More than a thousand just for an image file for example.
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Do we represent software in network physical diagram?
I am working on creating a wireless infrastructure for a production site and as I am creating a physical network diagram representing the structure of devices, subnets etc. in the network diagram.
So ...
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What are the good hardware, software and equipment's suggestions to set up a wireless infrastructure? [closed]
I am working on providing wireless infrastructure suggestions to a client like what software, hardware and equipment will be required to a client in order for them to set up the wireless ...
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VPN operating on layer 3, internal routes are accessible, but how to use it as a 'stepping stone' server for external servers? [closed]
I'm not really sure what my problem/request is called, but this is my situation:
I run an OpenVPN Access Server server. It's configured to operate on layer 3. The private subnet it can operate on is ...
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Can computers connected within a Network via Ethernet monitor access the information uploaded/downloaded on a different computer
Suppose there are many computers connected within a Network.
Let's take 2 examples. Computer A and Computer B, connected within the same network.
Suppose, At the start of the day, say myself as an ...
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What is Open Radio Access Network?
what is the concept of this open radio access networks?? more specifically what is this "open" for? how is it different from those of general RAN?
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VLAN access list for ip-helper addresses
I am forwarding two ports of broadcast UDP data from an inside private network VLAN (VLAN 100) to two outside private networks via WAN connections on an ISR4431. The broadcast forwarding seems to ...
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Why computers can communicate on different networks and routers won't?
I have a problem that I can not understand it myself and I need some help. I'm doing a kind of challenge, well network challenge in cisco packet tracer. I have a .pka file that stands for Cisco Packet ...
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Router Extended Access Control List
Why can't we place the Extended ACL close to the destination not the source ? What will happen if we do so ?
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802.1X MAC auth : Dell N2048 switch returns malformed EAP packet
I'm trying to set up MAC authorization with 802.1X using FreeRADIUS, a Dell N2048 (DN OS6.3.3.9) switch as the authenticator and a Ubuntu machine as the supplicant.
I've followed this guide for ...
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How to ping router from L3 switch
I am stuck in that that switch can't ping router and router can't ping switch.
How to fix that ?
I tried so much variants but them didn't help me
Actually router must do static routing, that i am ...
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How cellular networks gets internet? [closed]
Mobiles get internet but how?
From the towers, we used to get signals and communicate with others like calling or a message but coming to the internet how in the terms of networking terms like radio ...
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Deploying Virtual Stackwise Catalyst 9400
I am looking into deploying Virtual Stackwise on the Catalyst 9400 series switches. I wanted to know based on best practices where should the VSL links be deployed on the Sups or the modules? Is there ...
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should phy layer and mac layer be designed together?
I have a question about the independence of the layers. I know that the layers in protocol stack are designed in a way to be independent from each other. I want to know does it mean also that we can ...
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ASA 5505 cant access inside network from Anyconnect SSL Connection
So I have a ASA I can connect via SSL perfectly fine receiving internet.My issue is that I cannot ping any device on the network especially the inside network on my router. My topology is a ASA 5505 - ...
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How do I block IPs on my network? [closed]
I manage a network meant for specific people, who in turn illegally share the Wifi SSID logins with friends (and so repeated changing of passwords isn't a good option).
How do I configure the border ...
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Small office network setup help
We got a Linksys LGS552p switch (192.168.50.149), and a TZ400 Firewall (192.168.50.1) behind an "AT&T Modem", but we have external an IP address for the TZ400.
I need to setup VLANs: 90 for ...
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Unidirectional Subnet Communication
Let me first begin by saying I've looked around, and I haven't found a question asked that pertains to this situation exactly.
Essentially my question is this:
Is it possible to allow subnet S1to ...
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watch guard not allowing ping or traffic through wireless client
I have setup a little wireless network for some plcs we installed. When we connect directly to the switch or moxa awk 1131, we can ping all ip's 61.1 to 61.6 and also the gateway and get internet ...
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Cisco 2960-S switch with MAB and Packetfence Web Authentication
I am trying to set up Packetfence In my corporate environment for guest users, with MAC access bypass. i have done everything like in the official Packetfence installation guide https://packetfence....
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IP Domain-name on aggregation layer switch
Hi I was trying to generate ssh key for a switch
I read that , ssh key is generated as a combination of hostname and domain-name
I created a domain name like test
But doubt is , why isn't the ...
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DCF and PCF in Wifi-networks
I am studying, trying to learn how DCF (Distributed Coordination Function) and PCF (Point Coordination Function) works as access methods in WiFi, and how they relate to infrastructure vs ad hoc ...
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Network segmentation with VLAN and MAC auth: thoughts about implementation
Currently we have a medium-sized, flat network with some DHCP pools. This configuration isn't satisfying us anymore, as everyone can see everything on the network and it may leads to security issues. ...
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What's the meaning of "3D Universal Edge Routers"?
What's the meaning of "3D Universal Edge Routers"?
I often see this term on Internet, but I do not understand what it stands for.
Such as "MX240 3D Universal Edge Router", "MX480 3D Universal Edge ...
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Are there any advantage of using multiple threads for a file upload, for an internet connected node? [closed]
I got asked in an intervew recently to design a file upload feature.
After initial discussion, The interviewer asked if I can design for multiple threads. My thought was, As the network bandwidth is ...
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Network routing/WAN failover
Hi any one recommend me WAN Fail-over in Cisco 2811 router in virtual interfaces
I already try this configuration. but its not working
ip route 0.0.0.0 0.0.0.0 192.168.86.1
ip route 0.0.0.0 0.0.0....
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How does the ARP table work in case of the Gateway Router?
Suppose I am a host, I understand how ARP works in case I address an IP within my subnet. For each IP address there is a corresponding MAC address, and the owner responds to my broadcast ARP query. ...
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How should I connect two sites through the internet? [closed]
I have two sites which are 3km away from each other, both sites have internet access from the same ISP. I would like both sites to have access to each other throught the internet routers (TP-Link TD-...
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Options for Company A server access to Company B network (on same premises)?
I'm looking for the best way to allow access to another company's server from within our network (We are both located on same physical site).
At the moment Company B have limited infrastructure and ...
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Authorize IoT devices to connect to a WPA2 network without a password
I have an air quality IoT device that connects to WiFi and report data to the cloud and are planning to install 100+ devices at a customer location. To install a device, the customer has to connect to ...
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Cisco ASA 5510 implicit deny dropping traffic despite permit any ACL
I'm trying to allow VPN access through a specific public IP address on our company ASA. The ASA is currently configured with a /29 public IP address as follows:
Interface Ethernet0/0 "outside"
IP ...
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Access non-public IP computer
I am looking into methods how to access my PC from internet. I do not have a public IP (neither for my router nor local PC).
I know I can do 2 things:
ask for public IP and simply port forward
...
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Accessing Servers behind double NAT [closed]
Basically,
I want to know every possible way to access Linux servers or any other devices located behind ISP'S (Carrier-grade NAT) and our local NAT.
I have used VPN and forward-reverse tunneling ...
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