network – Develop a network topology mapper?

Expand Network Topology Mapper?
Hi, I'm developing a network topology mapper. I am struck at one point and I do not know what to do. Until then, I've seen different network management systems using SNMP, lldp and cdp and different protocols. I can access MIB devices with the help of SNMP for information. But I do not know how to find a connection between the devices. it's the point where I'm hit. The topology mapper must be able to detect different networks in the enterprise. then everyone can guide me or point me in the right direction.

What is the difference when analyzing external IP addresses from my local network compared to an external / cloud scanner?

I am concerned if I digitize effectively.

When I scan our external IP addresses with the scanner on my laptop, the packets leave my network through my firewall and route over the Internet to reach my public IP address. If this can be done, why would I need to pay extra for an "external scanner" if I can do it from my laptop? Do not I see the external IP address as if I were a stranger?

network – POST requests from the mobile network (hotspot or not) always fail

I noticed strange behavior regarding POST requests on all my internet connected device servers via 4G or via a wireless access point from a 4G network.

I am an administrator of 2 services hosted at AWS. Both services use the same Elastic Load Balancer and are hosted via ECS (fixed menu). Both services work with gunicorn and django but listen on different terminals.

The fact is that ALL POST requests coming from a device with a 4G connection or hotspot never seem to even reach the ELB (according to the logs, no query is logged), which is the first entry point that I control.

I've used debug mode and tried a few queries from my Android device. The Network tab of Chrome Developer Tools found that the query was silently failing, with no response code. It just hangs.

I can freely copy the request in a loop and it works.

The JS code is nothing extraordinary, a typical AJAX POST request.

Any ideas on what's going on? Any advice on how to debug this?

network – A question about proof of work

I will describe my question with the help of an example.

Suppose the network is working on adding block # 100 to the blockchain. An attacker recreates block 99 with a combination of transactions that are "legitimate", which means that they can be hashed with the same hash that the one used by block 99 (and that it does not). there is no double expense).

Then it broadcasts the block over the network. How does the network know this block is wrong and reject it?

I think it has something to do with PoW, but I'm not 100% sure. Can any one explain me the rejection process with a detailed explanation?

Thank you in advance for any answer!

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LibertyVPS.net
Fast Offshore Hosting

LibertéVPS is committed to protecting your data, your privacy and providing you with high quality hosting. We offer KVM VPS that can run Linux and Windows. We only use high quality hardware and high speed Gigabit connections. All our VPS come with secure storage, high bandwidth limits and dedicated RAM. we accept Bitcoin among our many payment methods for our bitcoin vps. Bitcoin is the simplest and easiest way to pay online and is completely anonymous to preserve your privacy. All Bitcoin payments are processed automatically via BitPay and will be credited once payment is made.

Liberty VPS offshore VPS are great for running websites, game servers, bitcoin portfolios, mail servers, file servers, and more. All our Linux servers come with a wide variety of operating system models that you can choose to install and all resources are dedicated. The best choice for beginners or professionals is the offshore VPS LibertyVPS. Our offshore VPS are located in our NL data center. Our data center is secure and offshore for maximum privacy and security. You can use your server to host websites, download files and more! We use the Ecatel data center, located in Amsterdam. Ecatel uses the best network equipment, hardware and transit providers. All the bandwidth is a premium bandwidth that translates into a very low ping and very fast speeds.

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Virtualization – Windows KVM
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Virtualization – Windows KVM
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Dedicated RAM – 4 GB
Disk space – 100 GB
Monthly bandwidth – 10 TB
Virtualization – Windows KVM
ORDER NOW$ 99.99 / month

payment methods
You can order our VPS using the following payment methods: PayPal, Bitcoin, Perfect Money, OKPAY. If you need another payment method, we are flexible! Do not hesitate to contact us!

Support / Contact
You can contact us at our ticketing system, or click here use our contact form!

Terms of use
We do not allow: Illegal Pornography, DDoS / DoS, Malware, SPAM / Phishing, Terrorism.

network – What are the OSI Layer 2 protocols most used on the Internet?

What are the OSI Layer 2 protocols most used on the Internet?
Probably a distinction between the protocols of dail-in, AS internal and inter AS makes sense?

I'm interested in all the protocol headers located under the IP header.

The approximate use values ​​of the main protocols would be useful.

Access Redis in a virtual network

I have an IaaS server in an Azure virtual network and a premium Redis cache in another virtual network. There is no NSG. I can not access Redis with redis-cli. Is there a restriction on access to Redis from a peer virtual network in Azure?

web application – Can the network administrator make changes to the site if I have accessed the site in edit mode?

I connect to the Internet via a neighbor's wireless router (not a guest connection).

Windows 10: I do not share files or printer. Domain, private, public network: The firewall is enabled. Scan = no problems.

I have a G Suite account to create sites. The site is published. Sharing options are secure. No other authorized users at this point.

Support has requested the URL of the site builder in edit mode.

Two days later, many unauthorized changes to the published Google site.
Is it possible for the administrator of the neighboring network to access or modify a site if it is in edit mode?

Can the Technical Authority use a URL to access or edit the site if I open it in edit mode? Obviously, I can view the site in another browser screen, so I wondered why a person with assistance with the link would be unable to do so.

Wanting to follow all these strange and senseless changes, is to eat my lunch. Need to identify the origin.

bitcoin cli – How to get the total number of transactions on the network with RPC

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