All Questions
16,500
questions
0
votes
1
answer
21
views
What is optical network coding? which techniques are there?
in optical network, what is network coding and which techniques are? is modulation a techniques of network coding?
- 1
0
votes
0
answers
10
views
can teach me how to use whatweb or nikto [closed]
now I am doing the penetration Test but I am 0 basic in cyber security so can someone help me explain the picture I provided is that website getting the error when using the tool is kali lunix nikto ...
0
votes
0
answers
15
views
IP over LoRa: TCP timeout [closed]
I am trying to tunnel IP packets via LoRa. For this I use two devices running Meshtastic.
Using ICMP I was able to determine that there is a packet loss of about 30% of the packets and a latency of ...
0
votes
0
answers
37
views
noob learning cisco
I'm trying to teach myself how to use cisco devices. i was given an router, switch and firewall. so far i been able to set up vlan and have intra vlan routing working. My issue is having the switch ...
0
votes
1
answer
40
views
Does an official list of tier 1 ISPs exist?
I'm trying to find an official list of tier 1 ISPs. I found a list on Wikipedia but can't quite understand how it was compiled, it just lists AS rank as a source.
I also found some other websites that ...
0
votes
0
answers
8
views
How to calculate maximum achievable throughput [closed]
Hey I've been given an assignment, that is,
TCP Throughput Calculation: Given a TCP connection with a round-trip time (RTT)
of 50 ms, a receiver window size of 8 KB, and a maximum segment size (MSS) ...
0
votes
0
answers
19
views
What Device / how ISPs Use to provide internet connectivity? [closed]
Pardon any naivety, just starting out-
I am not properly understanding how ISPs forward the access of internet to end users.
From the perspective of ISP all users are in LAN so they should use ...
- 1
0
votes
1
answer
23
views
Is a private network the same concept as a network which uses private IP addresses inside it?
Kurose's TopDown Network book says:
8.7.1 IPsec and Virtual Private Networks (VPNs)
An institution that extends over multiple geographical regions often
desires its own IP network, so that its hosts ...
- 1,545
0
votes
1
answer
29
views
How can I have multiple servers and IPs if I only have 1 ip with gigabit connection?
I have 1 gigabit connection with static public IP address...
Without depending on my local ISPs colaboration, is it possible to buy IPs from an online service and route each individual IP to my local ...
- 101
0
votes
0
answers
16
views
Is GSM developed anymore?
Is the GSM standard/spesification developed anymore? Does the GSM spesification/paper get any updates anymore?
Are UMTS, LTE, 5G NR versions of the GSM standard or separate standards? Of course them ...
- 1
0
votes
1
answer
23
views
Do unmanaged switches automatically do bonding/multi-link? [closed]
If i have 2 cheap unmanaged non-smart consumer level switches such as "Netgear GS308", do they support having 2 cables between them, and effectivly having 2gbit transfer between them? or ...
- 103
0
votes
1
answer
29
views
What is terminal adapter?
What exactly is an terminal adapter (TA) in an mobile station? Why a terminal equipment (TE) and an mobile termination (MT) can't communicate directly via AT protocol? Why it needs this separate ...
- 1
0
votes
0
answers
30
views
"No internet" problem after a Windows update, apparently unfixable. Anybody on the planet who can find its root-cause? [closed]
Good morning everyone.
IT tech here, learning IT since 1993. I might be able to remember less than 5 cases as mysterious and stubborn as this one.
I challenge every expert on the planet to find a ...
0
votes
0
answers
20
views
Why GSM do challenge-response authencation before encryption?
I read this Wikipedia article and I can't understand, why GSM do challenge-response authencation before encryption? Why it doesn't start encryption at the beggining and authencate with it?
Why this:
...
- 1
0
votes
2
answers
44
views
Why is EUI-48 to EUI-64 conversion deprecated, and yet it's used in IPv6?
The IEEE Guidelines for Use of Extended Unique Identifier (EUI), Organizationally Unique Identifier (OUI), and Company ID (CID) [PDF] have a section titled, "Mapping an EUI-48 to an EUI-64". ...
- 101
0
votes
0
answers
10
views
Netconf filter to get the access vlan of each switchport interface [closed]
Wondering if anyone has any filters i can use to get the access vlan associated with all the switchport interfaces on a switch. I am using python's ncclient to connect to the device.
0
votes
0
answers
21
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Monitoring system components affected by interference in EMI testing of wired ethernet [closed]
I'm conducting Electromagnetic Interference (EMI) testing on Ethernet setups running Windows and Linux. My primary objective is to identify specific system components affected by interference and ...
- 101
0
votes
0
answers
13
views
Cisco switch how to pass password via SSH cli [closed]
I created a new user to login via RSA Key, and this works.
But I'm going to find a way to somehow be able to pass the enable command's password in one command.
Suppose I want to save the output of ...
0
votes
1
answer
38
views
IP fragmentation and PMTUD
I have 2 questions.
1) According to a lot of sources, when IP packets gets fragmented, in this case, lets take icmp, the icmp header is present only in the first packet.
But I have observed on some ...
- 395
0
votes
0
answers
17
views
RouterOS - how to seperate two networks and forward SSH connection [closed]
I am in urgent need of help.
I have a network as shown in the image:
PC1 - 10.10.0.2
Router - 10.10.0.1
- 192.168.88.1
PC2 - 192.168.88.2
The router is using RouterOS
I have this task, that I have ...
- 101
0
votes
0
answers
15
views
Connect Computer to printer using ethernet cable [closed]
I have a scenario where I have connected computer using (RJ45 connector cross over combination) at one end and I have a receipt printer which uses RJ11 6 pin connector. Which combination should I use ...
- 101
0
votes
0
answers
9
views
How to run a HTTP server if ISP blocks 80 port? [closed]
I asked my ISP to open port 80. However, they opened port 10080 and did some kind of port forwarding to my local port 80. Basically when I setup port forwarding on my router from external port 80 to ...
- 1
0
votes
1
answer
25
views
What happens when the sender sends more data then the advertised window by the receiver?
I am relatively new to networking. I am doubting what happens when the sender sends more data than the advertised window by the receiver. I mean that the receiver advertises the window size based of ...
0
votes
1
answer
26
views
VXLAN VNI VLAN mapping
Is VXLAN tunneling similar to Q-in-Q tunneling (except VxLAN works at Layer 3), such that each customer/tenant gets its own VNI and each VNI can then map to multiple VLANs, so a single VNI can ...
- 113
0
votes
0
answers
21
views
How the DOCSIS is used? [closed]
How the DOCSIS is used in a company for example AT&T? I'm a Network Engineer and wanted to know more about DOCSIS but the Internet is not providing technically. So, can someone please share their ...
- 1
0
votes
0
answers
15
views
Implementing Video streaming restrictions based on hourly usage at home [closed]
I'm new at networking, so my question might be basic or naive.
I want to implement restrictions for mobile devices if it is being used to view videos for more than an hour continuously then its ...
0
votes
0
answers
8
views
How can I set up a local DNS or proxy that uses OpenNIC for OpenNIC domains/TLDs, and Cloudflare (or any other) DNS for the rest? [closed]
I've been pondering how to achieve this for the past few days. I love OpenNIC and everything they're doing, but sometimes the DNS servers are not always the best for normal, daily usage. While it's ...
- 1
1
vote
2
answers
63
views
The authentication page for Fortinet access is not secure
When attempting to access my Fortinet firewall by entering its address in the web page's URL, I encounter a warning. How can I authorize its address or, perhaps, its SSL certificate to prevent the ...
- 41
1
vote
1
answer
56
views
Would a /24 public ip range typically be from the same country?
Would a /24 public ip range typically be from the same country? This to reduce the amount of ipstack requests, checking from what country an IP is. (due to bot requests)
- 113
0
votes
0
answers
19
views
Unable to preserve HTTP/2 headers list when extracting frame using editcap. Hex Dump Matches [closed]
When I used editcap to extract a HTTP/2 Frame from a Captured PCAP using tcpdump, the HTTP/2 headers don't show up in extracted frame, but the Hex dump matches.
I am using the below editcap command to ...
1
vote
0
answers
18
views
l2circuit-control-passthrough on Juniper MX Boxes
I need to do some Y.1564 Measurements between 2 Cisco Boxes that are connected by a L2 Martini Circuit on a Juniper MPLS Fabric based on MX480s and MX204s.
I think the default behavior of Juniper is ...
- 527
1
vote
0
answers
24
views
Set promiscuous port for upstream LACP trunk on Cisco 2960X
I have a series of clients who are looking into a intra-VLAN isolation scheme to satisfy a DDQ request.
I was looking into deploying private VLANs for all client device / voice VLANs to satisfy this ...
- 11
0
votes
0
answers
27
views
Get wifi data from inside corporate building and train a Model with that [closed]
Hi we have a corporate with multiple buildings with WPA2-enterprise and we have different routers around the company (it is a wide company in terms of area) to have strong signal strength. I want to ...
- 101
0
votes
1
answer
32
views
Juniper MX204 licensing model
We have in mind to purchase a Juniper MX204 with base license, i want to know can we have ebgp and ibgp and using full table on this router?
Some people says that ebgp is not supported with base ...
- 577
0
votes
1
answer
57
views
OSFP anycast route different area
So.. lets pretend i need to advertise a route in anycast to the backbone, obviusly same route that in this case is 192.168.1.111 .
Can be a problem if the routers that advertise that route to the ...
- 1
-1
votes
0
answers
21
views
Home Computer Internetacess [closed]
When we use our home computer to connect to the Internet we need a connection through Ethernet cable or router connection and WiFi connection. Well I have thought of something better Eliminate all ...
- 1
0
votes
1
answer
29
views
Why mobile communication protocols have *G umbrella names?
Why mobile communication protocols have *G umbrella names, like 1G, 2G, 3G, 4G and 5G? Who order them? And most inportantly, have them any technically defitions?
I mean, actually protocols are GSM, ...
- 1
0
votes
0
answers
16
views
Why the length of IP address is fixed? [duplicate]
Is there technically reason for the fact that the length of IP address need be fixed? Now IPv4 address is 32 bits and IPv6 128 bits.
If IP address doesn't need fixed length, we would can structure IPs ...
- 1
0
votes
0
answers
20
views
Juniper MX204 port question
I have a Juniper MX204 with base license , I want to know can I have 3x 40G port and 1x 100G port on PIC 0 and 8x 10G on PIC 1?
- 577
0
votes
0
answers
31
views
TCP blocked until the acknowledgment received
I am currently facing an issue in my application where the TCP messages seem to be blocked until an acknowledgment received. Specifically, the subsequent messages wait for the acknowledgment of the ...
0
votes
0
answers
15
views
Problem with ethernet connection through wall socket - ( Router -> Switch -> Laptops) [closed]
I am new to this forum and I hope that I will get the help that I need.
I am setting up my home network which looks like this:
So I want to connect a router through a switch to all the wall ethernet ...
0
votes
0
answers
18
views
netflow v5 config not working - Juniper VMX
I use GNS3 and juniper vmx to practice netflow config.
I know that v9 needs MPC card, so i use v5.
But no netflow export from my router.
show services accounting flow comes nothing
Do I miss any ...
- 1
0
votes
0
answers
16
views
Can i use vpn to remote access offline nvr/ nas? [closed]
My objective is remote online access of nvr or nas which is not allowed internet access through router settings.
Im imagining using my router quickvpn/ l2tp/ pptp options to access nvr. Is it even ...
- 1
0
votes
1
answer
36
views
Mellanox (NVIDIA) SN3700 switch: Cumulus Linux configuration to force traffic path?
I want to stress all ports on a SN3700 switch with iPerf. I want to force the traffic to go through each port, so port 1 to port 2, port 2 to port 3, port 3 to port 4, etc.
The switch is running ...
0
votes
0
answers
13
views
Connect router to PC, as if it were the ISP of the router [closed]
I'm very new to networking and especially the Hardwere part of the networks, but I started working on something for which I don't have enough knowledge, but hopefully this is an opportunity to learn. ...
- 101
0
votes
0
answers
17
views
Finding the IPv6 -> IPv4 gateway [closed]
I am writing a program to accommodate a customer who has IPv4 sites that have no DNS name (that we're aware of, anyway), and I need to be able to reach the sites from a mobile network carrier that ...
- 101
0
votes
2
answers
34
views
Why Can't Routers Between a Switch Communicate with Each Other while Routers Between Two Switches can Communicate without VLANS [closed]
I am new to networking and just learning routing and switching in layers 2 and 3. I have two different topologies that baffle me when trying to send packets. In the first topology, I have 4 routers ...
1
vote
1
answer
53
views
Juniper MX with MS-MIC and ipsec performance
I've set up the gre over ipsec tunnel between SRX650 and MX5 (MS-MIC onboard). While SRX is able to serve ipsec tunnels traffic at about 100-200 Mbit/sec to other SRXes, I can get only about 1.5 Mbit/...
- 243
0
votes
1
answer
46
views
What is hiearchy of IP addresses? [duplicate]
What is structure/hiearchy of IP addresses?
I mean, is mandatory that IP address e.g. 216.9.10.0 is subnet of 216.9.0.0? Of course many times that is the case and IMO it would be logical, but I have ...
- 1
0
votes
1
answer
47
views
Build custom image for CISCO devices
Do CISCO devices support custom image building or deploying custom plugins?
OpenWrt has such feature.
