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Questions tagged [network]

For questions about Networking that includes design, and use of a network, the physical cabling, hub, bridge, switch, router, and so forth. Anything in relation to networking and its technologies.

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Troubles with recursive DNS using bind9 [on hold]

its my first question so sorry for whats about to become. Im working setting up a dns server for my lan, that may use a given iterative root server to resolve others lans domains. Ive configured it ...
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1answer
31 views

How to send traffic destined for public internet over network VPN without full tunnel [on hold]

We are running some of our networked equipment on a network controlled by another organization. Our equipment needs to be able to access some internal resources hosted on our private network in AWS. ...
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0answers
17 views

What types of communication cables can pass through electrical conduit? [on hold]

What types of communication cables can pass through electrical conduit? I believe that optical fiber is the only one possible. However, I'm not sure. I'm trying to make a home project where I have ...
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0answers
14 views

WIFI PRIVACY USING A FRIENDS WIFI [on hold]

isTHERE AWAY I CAN PROTECT My Accounts and phone info on an andriod if I'm using a nieghbors wifi network like Keep my accounts from syncing to there wifi connected stuff
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0answers
28 views

what are some Organization that got hacked because of WEP protocol? [on hold]

I wanted to do some research on WEP protocol and i wanted to know some organizations that were hacked just because of this vulnerability.
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0answers
88 views

Acknowledgment number (Go back n) vs Sequence number (Selective repeat) [on hold]

An acknowledgment number in the Go-Back-N protocol defines the next packet expected, but an acknowledgment number in the Selective-Repeat protocol defines the sequence number of the packet to be ...
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1answer
46 views

Map of WAN cables in general [on hold]

Whenever i search for the physical location and path of WAN connectivity, i only find submarine cables, and a site that seems like a paid service. Is there no free map where i can e.g. show the route ...
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0answers
10 views

How to build a career in Cybersecurity? [on hold]

Hello I am second year BTech student from India and I want to build career in Cybersecurity so I would like some advice.
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0answers
19 views

How do hackers hain access to a network through IOT devices? [closed]

Suppose we have a a thermometer that is connected to a wireless access point. The thermometer is using MQTT protocol (which is easily hacked) and the hacker wants to access the complete network to ...
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2answers
45 views

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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0answers
12 views

Why can't I reach mail.google.com, translate.google.com and chrome.google.com? [closed]

I'm experiencing trouble trying to connect to Google. This is the case both through any web browser, and ping from Command Prompt. The trouble is limited to: Laptop devices but not Mobiles my home ...
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0answers
6 views

Problem connecting to FTP through VPN after switch to new router (with identical network and port-forwarding settings) [closed]

I have a problem with the following setup: A friendly local business has a time stamp clock on site A. This clock provides data via an integrated ftp server. Also on site A: a Raspberry Pi 3 running ...
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4answers
90 views

Why Vlans need routers to communicate?

why devices on two separate VLANs (Virtual LANs) implemented on the same switch require a router to communicate.
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0answers
7 views

Excessive Polling - Rate Issues [closed]

I am building a bot to perform functions in chat at dlive.tv but am running into an architecture problem. I would like to poll XHR endpoints (GET,POST) as a service for users who register for a bot ...
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0answers
11 views

What ISP know about my local network when I use their ONU? [closed]

I have FTTP (Fibre to the Premises) and a GPON ONU given to me by my ISP. I know they can see hostnames and MAC of devices connected in ONU. If I connect my personal router to this ONU and then ...
3
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3answers
71 views

Is it possible that two servers were configured with the same ip under the same switch

I have two physical servers, their configuration as following: ServerI: IPADDR=10.1.1.5 NETMASk=255.255.255.0 ServerII: IPADDR=10.1.1.5 (Same IP) NETMASk=255.255.0.0 (different NETMASK) Because of ...
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0answers
28 views

Configuring two routers on my home network [closed]

A few months ago, I had a new router installed. The ISP took care of it. I'm not exactly sure how these routers are connected together. Pictured is the box (I'm guessing some kind of cheap switch) the ...
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2answers
66 views

Stop Memcrashed amplification DDoS attack

DDoS is essential part of my life so i am back with more question, Yes we started getting memcache based UDP amplification attacks, all source ports are 11211 coming from many random source IPs, we ...
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0answers
22 views

sflow configuration Cisco Nexus 9396PQ

We have Cisco a Nexus switch with M12PQ 12x40G GEM expansion card. Today when i enabled sflow on one of 40G interface i got following error: # sflow data-source interface e2/12 In order to enable ...
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1answer
43 views

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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0answers
7 views

How do netmasks work? [duplicate]

A bit of a noob question, but this isn't quite clear to me yet. Ip Address Decimal 10 20 0 100 Network Decimal 255 255 0 0 ---------------------------------------...
0
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1answer
51 views

nxos ansible playbook to configure interface

Last few days i am playing with cisco nexus switch to deploy config using nxos ansible modules to make it automate. I am running n3000-uk9-kickstart.6.0.2.U6.6.bin software and here is my playbook ...
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0answers
20 views

Questions about IP addresses [duplicate]

So, I have to research IP addresses, and there are a couple of things I don't quite understand. In my test there will be questions like 'Which of those IP-addresses is private' or 'which of those is a ...
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3answers
53 views

How to explain the data flow of OSI model layers in a single picture [duplicate]

Take an example of searching www.example.com in a web browser. I have some confusions at each layer and they are We have opened a web browser and searched for www.example.com. Now, As far as I know, ...
1
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1answer
36 views

Help with network setup [closed]

I have the following situation: Router 2 is a given. It is used by several people to go on the internet ('People we don't trust'). We are a tiny company that is supposed to go on the internet ...
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0answers
10 views

answer the following question [duplicate]

I have one question about IP addresses. If I have address 168.173.70.134/29 how should I know what type of address is this one. It could be: Network address, Host address, 1'st ip last ip brodcast ...
5
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2answers
793 views

Why do IPv6 unique local addresses have to have a /48 prefix?

According to RFC 4193, unique local addresses will always have a prefix of FD00::/8.. but according to Wikipedia: The block fd00::/8 is defined for /48 prefixes, formed by setting the forty least-...
1
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1answer
18 views

Can a hub be used for sniffing traffic from a device?

My intention is to analyze all network traffic which is coming to and originating from a network connected device I have. From the configurations of the device I am able to proxy all the HTTP traffic ...
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0answers
16 views

Confuse about type of handover in Mesh Router?

I have difficulty in understand the concept of handover which can be categorized into two: Horizontal or Homogeneous handover Vertical or Heterogeneous handover Horizontal handover occur within the ...
1
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2answers
91 views

Confused about the results from the cable tester

A little bit of backstory, just in case you want some context. In the last couple of weeks the network at least internally has slowed down. As far as I can tell the only things that have changed has ...
1
vote
1answer
34 views

using 802.1x with nic teaming

I am working on a project which is mandatory to have each pc configured with two network interface cards as a nic team. I want to use 802.1x for authentication with a radius server like cisco ISE. My ...
0
votes
1answer
41 views

Cisco ASA not passing traffic between two interface

I have Cisco 5506 with Security Plue License and following is my configuration. interface GigabitEthernet1/1 nameif inside security-level 100 ip address 10.0.10.1 255.255.255.0 ! interface ...
7
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2answers
2k views

What is IP squat space

I came across this article and I'm trying to understand what is going on here, I found some packets on my network containing 22.0.0.0/8 and 29.0.0.0/8 IP range and It's based on: https://en.wikipedia....
3
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1answer
66 views

Does IEEE 802.11 allow soft-combining?

Out of purely theoretical curiosity, I was wondering whether the IEEE specification for WIFI allows for ARQ with soft-combining. I found a number of publications describing the benefits of soft-...
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0answers
30 views

Deploying Segment Routing in Cisco XRv9000

The Workflow for Deploying Segment Routing according to this is the following: Configure the Segment Routing Global Block (SRGB) Enable Segment; Routing and Node SID on the IGP Configure Segment ...
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2answers
58 views

Loopback Interface speed is 10 Mbps but Incoming and Outgoing Traffic is in Gbps

I am writing a script which mails interface data to network admin. For this I'm using LibreNMS and RRDTool to gather data. On inspecting one of the loopback interfaces, I found that the interface ...
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1answer
27 views

Theoretically, can the interconnection between a USB Printer and a PC be called as a network? [closed]

The three conditions that must be fulfilled in order for a system working to be called a network are: The existence of data communication A minimum of two devices that are connected through said ...
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3answers
36 views

How to detect passive network host? [closed]

I have a big network that contains hosts of different types (industrial, computers,servers,iot,etc.). All the hosts are within the same central building. I need to identify all the hosts passively, ...
0
votes
1answer
32 views

What is the reason for encrypting Identity field under IPsec phase1?

Why Identity fields are encrypted in IPsec phase 1 around packet 5/6 ? provided that the Identity field contains IP of either end. Does it has any significance ? Does it holds anything different then ...
0
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1answer
54 views

IPSec tunnel between 2 LANs using HSRP in each side

This is my first post here, so tell me if there's something I'm doing wrong. I'm currently working with another IT student on our end of degree project and we're building our network in PT. Our ...
0
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1answer
38 views

Advice to correct and improve a network diagram

I need to build a "secure"-network diagram with Visio for my school. I already build it but I want to get some advise about it to tell me if I made some big mistake or if I can improve it. My diagram ...
0
votes
1answer
28 views

Can more than one person work at the same time in Packet Tracer?

I want to know if more of one person can work in packete tracer at the same time. For example if a friend from her house and I from mine could work in the same proyect of packet tracer at the same ...
0
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1answer
39 views

Connecting two ISPs on one network

I am working in an institute where the internet connection is divided amongst 3 different floors: Ground Floor, First Floor and Second Floor. Now since I am new to the networking, I know the ...
0
votes
1answer
30 views

SonicWall global vpn

I have a SonicWall device, and I am new to them. I created the global vpn and, after installing the SonicWall at the customer's site, wanted to make some configuration changes. I am using the global ...
0
votes
1answer
19 views

ACL and ACEs Query

So i'm configuring a basic network and I need to create a couple of Extended ACLs. Now my question is, does this ACE permit any TCP connection to the following subnet? permit tcp 192.168.10.0 0.0.0....
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0answers
125 views

pfSense: Route traffic from LAN to OpenVPN client

I have set up OpenVPN on pfSense, and it works almost the way I want it. The client connects to the pfSense box from the WAN, is assigned a tunnel IP and can communicate with all the networks on the ...
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2answers
64 views

How does a computer know IP address of a computer on another network

I was watching a video explaining ARP, which was explained really easily but I got confused when they said that Host A already knows Host D ip address which is on another network. Host A and B were ...
2
votes
1answer
44 views

What “32-bit boundary” means?

As a non English speaker, I'm not sure to understand this sentence : "Padding bytes are added at the end of the Packet Data Field to align the Packet Data Field to a 32-bit boundary". For me, "...
5
votes
2answers
57 views

Network Switch Power Isolation

I run a small office network that uses TP-LINK T1600G-28TS (TL-SG2424) JetStream switches. The office is across two buildings, each fed by a different phase of power. We've recently installed HD ...
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votes
1answer
42 views

Network IP questions [duplicate]

Suppose I have a network with IP address 192.168.10.1/16. This network can hold up to 65536 machines, from 192.168.0.0 up to 192.168.255.255 (65534 machines without the network ID and broadcast ...