All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
3 views

How to fix a “ipsec,error EAP failed:” error on Mikrotik? [closed]

Given Router: Mikrotik HAP ac^2 Software: RouterOS 6.46 (latest stable for the moment) Problem I have set up an IPsec connection as described here IKEv2 EAP Ipsec. The router fails to connect to a ...
0
votes
1answer
7 views

send packets back to a packet-coming port for L2 traffic using L2 switch

I have VMs connected to a single NIC port, and that physical port is connected to a physical switch port. +-------------+ | Server | |+----+ +----+| ||VM_A| |VM_B|| |+--+-+ +-+--+| | +--+--+ ...
0
votes
0answers
21 views

Join two VLANs with cable [closed]

For some reason I need to join two separate vlans in some situations. The configuration than I'm trying is Ports 1 to 9 -> VLan 1(untagged) Ports 10 to 19 -> VLan 2(untagged) Ports 20 to 30 -...
0
votes
0answers
12 views

Accessing Two connections at the same time in Ethernet? [closed]

As my freshman project, I have a system in which i'm using a network switch. The switch is connected to an IP camera, and Arduino ethernet shield via CAT6 cables. Now, i have a PC connected to the ...
0
votes
1answer
20 views

Effect of block size on network congestion?

I am interested in comparing TCP/IP network congestion under two scenarios: Scenario 1: A large number of senders send messages to a group of receivers Scenario 2: Same as above except that the ...
0
votes
1answer
13 views

Cisco 2960 radius configuration

I have multiple cisco switches like Nexus family and IOS family switches and now i am trying to configure centralized authentication so i have install Freeradius and freeIPA (ldap server) I have ...
0
votes
0answers
6 views

sony vaio wifi bluetooth not working [closed]

This is sony vaio i3 sve15113enw series laptop with windows 7, months ago updated to windows 10 and was working without issues. Due to x0000098 boot error had to recover the os with vaio rescue that ...
0
votes
0answers
22 views

Tacacs+ login asking ENABLE password & logs not working

I am new to TACACS so please bear me with my novice level questions :) I have configured TACACS+ on Ubuntu. now I can login to switch with users defined in TACACS+ server. I have created two users, ...
0
votes
1answer
31 views

Enterprise network VS Industrial network [closed]

I would like to know the difference between the enterprise network and industrial Network.If someone has experience in industrial network, is he able to work in enterprise network?
0
votes
0answers
22 views

What does it mean when someone says router R1 has IP address 172.16.10.6/30? What is the significance of /30? [closed]

Why is router IP address containing mask here? What is its significance?
0
votes
0answers
9 views

Sending raw IP packets through OpenVPN, which source address to choose? [closed]

I'm writing an OpenVPN client that does not use tun device. I send the packets directly through the library. For testing, I'm using libtins to craft the IP packets by hand. I did like this: Tins::...
0
votes
1answer
51 views

Can 2 Wi-Fi adapters work with a single antenna?

I have a panel Wi-Fi antenna and an adapter for it. These 2 work flawlessly together. But also I would like to connect to somewhere else without buying another huge antenna. Is it possible if these 2 ...
0
votes
0answers
25 views

What happens when a DHCP server exhausts the scope? [closed]

Say all of the DHCP scope addresses are taken, what happens when trying to connect to that network? Does it stop you from connecting, or does it kick out an existing connection to make room?
0
votes
0answers
20 views

Is it possible? Probing IPv4 IP with IPv6 [closed]

I recently came across with a strange finding, while I was doing a nmap scan on one of a IPv4 IP destination. Please see below are the cases I came across: 1. ISP-1: with only IPv4 IP as source. I ...
0
votes
1answer
21 views

BGP Collector and Vantage Point relationship

I am currently reading a paper BGPStream: A Software Framework for Live and Historical BGP Data Analysis where authors say: Normally, a BGP session with a collector is configured as a customer-...
0
votes
0answers
22 views

Why TCP is not in layer 5? [duplicate]

I read that TCP is in layer 4. But i also read that to send data with TCP i have to establish a session (in the handshaking phase). Does this mean that if we work only up to layer 4 TCP is useless (...
0
votes
0answers
13 views

5Ghz WiFi connecting to router but no internet on *some* devices. Flaky connection [closed]

I have a very weird issue and technical support at my internet provider are no help. I have a 5Ghz enabled router, and a 5Ghz enabled WiFi card in my computer. I know for a fact that the 5Ghz on my ...
0
votes
0answers
13 views

Wireshark trace - timeout problem [closed]

I have following setup (as visible in the attached image): A (java process) -> B (kubernetes ambassador proxy) -> C (java service in kubernetes pod) Communication is done using HTTPS between A and B,...
1
vote
1answer
26 views

What is the need of LSA refresh after every 30 minutes?

What is the exact need of LSA being refreshed every 30 minutes.
0
votes
1answer
35 views

Setting the network address freely [duplicate]

I'm trying to understand IP Addressing, but there's something what's still not clear for me. With mask 1111111.1111111.1111111.00000000 (/24) Am I able to set network address "freely" like this? ...
0
votes
0answers
17 views

Why do Wi-Fi devices suddenly become unable to see each other, while they can still see Ethernet devices, on my low-end router/modem? [closed]

As part of a fiber switchover I'll soon be replacing the ancient Netgear DG834GU ADSL2+ modem + Wi-Fi router I've been using for the past few years. Before I finally retire this old thing (which, if I'...
0
votes
0answers
8 views

can I setup two LANs (each w/their own WAN) to share the other's WAN? [closed]

LAN1 is a house in a rural area with slow ADSL internet. LAN2 is an "observatory" building 420 meters away housing a telescope. Observatory has Verizon 4G modem that works quite well. If I setup ...
0
votes
0answers
10 views

Have an interview for GCP and Kubernetes coming up. What aspects should I study? [closed]

Basically, I applied to a telecom company that are moving their services to GCP. The role required Java, NodeJS, SQL, and some Kubernetes. I did the assessments and passed. Thing is, I'm mostly ...
0
votes
1answer
33 views

How to traceroute in SDN Networks while traceroute is not working in SDN by default?

I have used all opendaylight, floodlight and POX controllers one by one in my SDN ring topology which is created by mininet, but I am not able to use traceroute command and trace the paths where the ...
0
votes
0answers
13 views

ARP traffic for devices in same LAN but different subnets [duplicate]

Given a LAN with 5 devices (a,b,c,d,e). Where devices a and b are in one subnet and d,e,f are in another. Will an ARP request broadcasted by a looking for device b reach devices d, e ,f as they are ...
0
votes
0answers
12 views

How to calculate bits needed for host, bits left for network, number of available networks? [duplicate]

I have a class b address of 145.14.0.0 I need to create a scheme where each subnet accommodates 2259 hosts. can someone explain step by step how to do that
0
votes
0answers
8 views

Which standard should i use cross over or straight through to transfer data between laptops? [closed]

There is the data on my laptop and I want to transfer those data to another laptop using LAN cable. But I don't know which standard I should use either straight-through or cross over. Can I use both ...
0
votes
0answers
7 views

Vpn infrastructure connection! [closed]

I live in a bad connection area im using sim card to access the internet.My internet speed literally was between 40 to 200 Kbps i couldn't even Google anything,i started my VPN app i had an ip from ...
0
votes
0answers
10 views

which means double 2 points 192.168.1.2::3 in a vnc connection [closed]

install real vnc to make connections to a windows server but at the time of accessing me it appears that to access I must approach it with the route 192.168.1.2::3 I understand that: after the IP ...
0
votes
0answers
10 views

Help with setting up new home network, hardware choices [closed]

I need to replace my wifi router and have looked at different Ubiquiti solutions. I'm going to install this in my home, with two meshed wireless access points and several wired devices. My initial ...
0
votes
1answer
21 views

Guest Network (VLAN/Subnet)

I'm designing a network that basically needs to separate staff network and customer network. The client currently has a standard ISP modem/router that has no VLAN capability or any ability to separate ...
0
votes
0answers
10 views

Netstat Review for query service on a Centos [closed]

Server : Centos 6.9 1GIG Uplink IPV6 Hi We query a external server via a tcp port and if they have a collection of delays then we fire higher query rate. I am trying to tweak the tcp stack to ...
0
votes
0answers
31 views

Issue with DHCP across VLANs [closed]

I was wondering if someone could provide some insight for the following issue. So I have a Network which uses the 'Router on a stick' topography. This has been subinterfaced to allow Inter-Vlan ...
0
votes
2answers
58 views

Is there a way to manage IP space with only a switch?

Is this scheme possible? External provider = External provider of the internet Generally speaking, is there a way to assign a public IP address individually for each server to be used when SFP+ port ...
1
vote
1answer
30 views

IP Routing and Switching Interface Speeds

I have a question that relates to routing and switches. I am looking to set up a new Firewall that will handle the routing for the network and attached to the Firewall will be a switch. Here are the ...
0
votes
1answer
35 views

Ideal Rx Power range for Cisco 7613 controllers and interface status if not in the ideal power range

I observed Rx power out of range in 4 controllers of CISCO 7600 router as given below- The Transceiver in slot 3 subslot 0 port 0 is enabled. Transceiver Rx optical power = -1.8 dBm ...
0
votes
0answers
16 views

Resilient (Ethernet+Wifi) Router->Router Connection [closed]

I have a router, connected to my modem, downstairs in my house. This is connected to a HomePlug, the other side of which connects to a second router upstairs. This allows me the lower latency and ...
1
vote
1answer
39 views

Why is XGMII little endian while the network is in big endian?

Why is XGMII little endian while the network byte order is big endian (RFC1700)?
0
votes
0answers
30 views

Graph-based network monitoring or another approach to repetitive low level network troubleshooting possible? [closed]

Maybe I am asking something which is way too unrealistic, maybe there is other solution to the problem therefore the direction I am looking towards is wrong. Please post a comment to help to ...
0
votes
0answers
22 views

Why is port 3301 unassigned? [closed]

According to the SANS ISC, port 3301 is unassigned. Does anybody know the history or reason why this port is unused, when every port around it is assigned?
0
votes
0answers
6 views

Fritzbox to Draytek VPN setup [closed]

I have three offices and VPNs between them. 2 nodes have Draytek Vigor 2860. At the third I have have replaced a TP-Link Archer VR600 with a Fritzbox 7530. Currently, Nodes 1 & 2 are calling into ...
0
votes
1answer
41 views

How networks protocols communicate with each other?

We know that before sending information TCP has to establish connection with other host. So, does the request from TCP get encapsulated by lower levels of stack protocols or it's just directly send to ...
1
vote
0answers
30 views

Diagnosis advice needed: cannot reach some specific websites [closed]

I switched my ISPs modem/router to bridge mode and connected it to my router running openwrt. Openwrt router is connected using PPPoE. My ISP gives me it only an IPv4 connection. Pretty much ...
0
votes
1answer
26 views

How can I connect my IP cameras from PoE to NVR? [closed]

I have a series of IP cameras around my house which some are wired directly to my router and some are wired to a couple PoE switches that are then wired to my router. At the moment this setup ...
0
votes
0answers
13 views

Simple static route issue on ASUS router [closed]

I practice "occasional networking" i.e. I set up stuff now and again based on needs, but between projects I forget plenty :) I have a seemingly simple question about static routing that is eluding me. ...
0
votes
0answers
11 views

Can I use this VPN setup? [closed]

I'm Trying to connect to a server from within my university. I have to use the universities VPN to connect to the Internet though. The university VPN is L2tp(+PSK). I also have to use another VPN on ...
3
votes
1answer
186 views

What is the difference between Cisco's QoS models and strategies?

I have been reading about QoS and different strategies. From what I understand, Cisco proposes three different models and three different strategies for QoS. For strategies, you can have a 4-class, ...
0
votes
0answers
41 views

What even is this cable [closed]

I cannot find this cable anywhere online. A friend of mine has problems with his internet connection. On the back of his computer he's got a strange ethernet cable. Maybe it's a bad cable that's about ...
0
votes
1answer
34 views

TCP implementation [closed]

Can one speed up TCP transmission of packets if the no.of bits in sequence field and no. Of bits in acknowledgement field are reduced ? If yes , then how much time is saved? Mathematical equations for ...
0
votes
0answers
15 views

Ping does not work on TAP interfaces with bridge [closed]

I am trying to understand the linux bridging and local ip rules, I have following topology on my linux laptop. br0 ___________|__________ | | |tap0 ...

15 30 50 per page