Windows firewall and ports – Information Security Stack Exchange

Windows firewall and ports – Information Security Stack Exchange

embedded systems – Flash programmers asking for COM ports

I work an embedded development job that sees me having to setup programming methods for hourly production line workers.

On the current project I am unable to use our PE Micro Multi link Universal. While finding a solution I noticed that there were two methods that I could find.

The first method I see is companys offering a hardware device that does the programming. It may or may not have a PC component.

The second method I have seen are software only solutions. On each of these they want you to select a COM port to communicate with the device.

So my question is regarding this second method and how it works? Most of the hardware programmers I have used do not come up as a com port. The one programmer that does come up as a com port uses a USB to serial cord to plug into a jtagice mkii. I am pretty sure that these software only solutions are for older chips prior to jtag implementation/adoption. I also assume that to use these software solutions the correct lines would of had to be routed out of the chip. As is I have a 10 pin jtag connection.

networking – Hi trying to find drivers for Dark hero motherboard (to make my ethernet ports work)

trying to get this setup been years since i used linux. didnt see any drivers available for the mothertboard / nothing popped up for the ethernet port or my 6800 xt (display is working just didnt list a driver like with my nvidia pc?) but ethernet port isnt working at all. not sure where to start,or if i need drivers for everything individually to do things like adjust settings and led control? so appreciate yall

on 20.04.02 LTS
dual booting with win 10
ryzen 9 5900x
crosshair vii dark hero x570
amd radeon rx 6800xt
gskill trident z royal 64gb (16×4)
galahad aio 360

not sure what other info yall would need

networking – How do I hook up a business modem with 6 ports to a switched network?

I have a small business modem that has 6 ports on it, each being a static IP.

My network has grown however to the point where I have more than 6 devices, so I am moving to use a switch, which has other benefits as well.

Does that make my 6 static IPs redundant? Should I just connect one of them to the switch and NAT everything, or is there a way I can use all 6 IPs?

network – NMAP Scan Shows Ports for VNC, RDP, SAMBA & SSH on iOS – is this normal?

I ran an nmap scan on my iPad’s IP address and the results showed the following ports listed below available in a filtered state. See screenshot for the actual terminal results. This can’t be normal, right? There are no apps installed that would explain these ports and the device is not jailbroken.

nmap results
ms-wbt-server (Remote Desktop)
4 different VNC ports
And an iPhone Sync port

firewall – systemd-timesyncd requires incoming ephemeral ports opened

I’m trying to get some sort of time synchronization configured for a Ubuntu server. The server is behind a cloud-provider-stateless firewall. Through some trial and error I found out that in order for ntp to work, I have to open the incoming UDP port 123.

Then I read that using systemd-timesyncd is preferred nowadays, so I tried switching over to that. But that did not work. The service log was full of

systemd-timesyncd(2656121): Timed out waiting for reply from (
systemd-timesyncd(2656121): Timed out waiting for reply from (

Only after I also whitelisted the ephemeral UDP ports 32768–65535 in the firewall did this start to work:

systemd-timesyncd(2656121): Initial synchronization to time server (

Is opening that range of ports really necessary to operate systemd-timesync?

networking – Same ports with different domains(subdomains) with different services(websites) on same server

Here is my setup:

-RasPI static ip with 192.168.x.x resolving to my domain and port 443 open on my router forwarding to my Pi

-Vaultwarden(bitwarden) running within a docker container using https port (443)

-Nextcloud cloud storage using apache running over 4433 (ssl)

-Have a domain with two subdomains:,

What I want to do:
Have vaultwarden and nextcloud running under the same port (443) but have vaultwarden resolve to and have my nextcloud (website) resolving to

Now, I am aware of a virtual hosts file using apache or nginx as a way to make this happen, but using vaultwarden within a docker is throwing me off and not sure where to go from there. I know i could just buy another domain, but I would rather not do that.

Any ideas? If this makes sense of course.

Let me understand the Thunderbolt/USB 4 ports of the new iMac

The top model of the new iMac to be launched by the end of May 2021, is said to come with 2 Thunderbolt/USB 4 ports and 2 USB 3 ports.

In my mind, Thunderbolt is a physically different connector compared to the other 2 USB 3 ports, but looking at this picture they are apparently the same port.

I have an old 2012 iMac connected to two external TVs through the thunderbolt port. Each port using a thunderbolt to HDMI dongle. I am not mirroring the main screen. I have 3 independent monitors, the iMac one and each TV.

So I thought, I could do the same to this new iMac. I disconnect the dongles I have on the old iMac and connect to this new one but apparently these “thunderbolt” ports of the new iMac are in fact USB-C ports that deliver thunderbolt. So, In fact I need USB-C to HDMI dongles, right?

So, physically speaking, this new iMac only has 4 USB-C ports, two of them being able to deliver “thunderbolt”, right?

This new iMac has two of these “thunderbolt” ports but apparently if I use both, I will not get two external independent monitors right?


hexagonal architecture – Are API Ports conceptually use-cases, or signal transmission?

With a Hexagonal/Ports and Adapters Architecture, there are input ports and output ports (or primary/secondary, or driving/driven, or API/SPI).

In Implementation Domain-Driven Design, Vaughn Vernon mentions

There is not a strict definition of what a Port means, making it a flexible concept. In whatever way Ports are partitioned, client requests arrive and the respective Adapter transforms their input. It then invokes an operation on the application or sends the application an event. Control is thus transferred to the inside.

We Probably Are Not Implementing the Ports Ourselves

We actually normally don’t implement the Ports ourselves. Think of a Port as HTTP and the Adapter as a Java Servlet, or JAX-RS annotated class that receives method invocations from a container (JEE) or framework (RESTEasy or Jersey). Or we might create a message listener for NServiceBus or RabbitMQ. In that case the Port is more or less the messaging mechanism, and the Adapter is the message lsitener, because it is the responsibility of the message listener to grab data from the message and translate it into parameters suitable to pass into the Application’s API (the client of the domain model).
Vaughn Vernon, Implementing Domain-Driven Design, p. 127

However, there seems to be other opinions about the roles of Ports and Adapters. This site says

Ports are the medium through which business logic is accessed.Port is a use case boundary i.e. Ports correspond to use-cases in the application.Multiple things can use the same port.E.g. In banking domain a use-case like ‘DepositCash’ can be used by an ATM machine or Online bank site or a backend system or a Test harness for testing the port.

This site says

Inside the core we define something that it’s called Port it defines all the interactions that a core will have with anything outside. These ports are like contracts (or APIs) and can be divided into two groups incoming (primary) and outgoing (secondary). First one are responsible of how you can interact with business core (what commands you can use on it) and latter are used by the core to talk to the outside world.

This site says

Ports represent the boundaries of the application. Frequently they are implemented as interfaces to be used by outside parties. Their implementation resides outside the application, although they share the same domain.

Primary ports

Primary ports are also known as driving ports. These are the first communication points between the outside and the application core. Therefore, they can still be otherwise known as Inbound Ports. These ports “drive” the application. This means that this is where requests get through to the application. The upstream in this case contains data and the downstream contains the reisponse to that request. Primary ports reside on the left side of the hexagon.

This site mentions a number of different Ports, in the style of Use-Cases (Retrieve Active Products, Retrieve Additional Data A, Retrieve Additional Data Z, Retrieve Product Groups, Input stub products)

Some seem to agree that API Ports are defined in the Domain, and are more aligned with use-cases, rather than signal transmission (HTTP, RabbitMQ, NServiceBus).

Are Ports use-case interfaces, or signal transmission mechanisms?

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