ports

问题 I am trying to run a small app that scans ports and checks to see if they are open using and practicing with threadpools. The console window will ask a number and scans ports from 1 to X and will display each port whether they are open or closed. My problem is that as it goes through each port, it sometimes stops prematurely. It doesn't stop at just one number either, its pretty random. For example it I specify 200. The console will scroll through each port then stops at 110. Next time I run

问题 I understand that to expose ports in a docker container, you can use the -p flag (e.g. -p 1-100:1-100 ). But is there a nice way to expose a large percentage of possible ports from the container to the host machine? For instance if I am running a router of sorts in a container that lives in a VM, and I would like to expose all ports in the container from 32768 upwards to 65535, is there a nice way to do this? As it stands I've tried using the -p flag and it complains about memory allocation

问题 I'm looking to be able to basically change ports that my express app is running on. I've tried: server.on('close', function() { server.listen(3000); }); server.listen(8080); server.close(); This returns a cryptic node.js error. I'm running node v0.4.11, I'm upgrading now to see if that fixes it. EDIT Here's the error: Assertion failed: (!io->watcher_.active), function Set, file ../src/node_io_watcher.cc, line 160. Thanks, Matt 回答1: The issue is that .listen is asynchronous. By calling .close

问题 I sometimes see statements that on some platforms the following C or C++ code: int* ptr; *ptr = 0; can result in writing to a hardware input-output port if ptr happens to store the address to which that port is mapped. Usually they are called "embedded platforms". What are real examples of such platforms? 回答1: Most systems in my experience use memory-mapped I/O. The x86 platform has a separate, non-memory-mapped I/O address space (that uses the in / out family of processor op-codes), but the

问题 I have a series of pre-created SVG symbols I want to use in JointJS. I've searched about using precreated SVGs and I found to be possible to create a complete custom elements using SVG by putting the SVG in the 'markup' property - (https://groups.google.com/forum/#!topic/jointjs/pQvN_0lXPVk). Below is the example of an SVG. Your help about how can I embed this definition in the markup property and add ports to it will be highly appreciated. Thanks <?xml version="1.0" standalone="no"?> <svg

问题 If I want to self host WCF in a Windows Azure Website by spinning up my own ServiceHost can I host end points on 8080 or any other port I want to? Is there any specific usable range of ports I have access to or is port access entirely blocked? Edit: for absolute clarification this question is NOT about web or worker roles and is only about Azure Websites 回答1: This blog post is slightly out dated now as Windows Azure Websites have more features now (like staging and production slots, WebJobs,

问题 HTTP has some well-known alternative ports, like 8080, etc. If I need to deploy any service which is served through secure HTTP, or maybe I need to assign any port to a HTTPS service on my local machine, but I already have another HTTPS service handling the 443 port, is there any convention about which port to use? Side note: this question was posted for reference means since the answer was already posted to a question, but that question was not asking exactly that - anyway the answer was

问题 I have been reading a lot about different NAT traversal techniques, but I am still a little unclear about how it works. If I open a TCP port on a client machine and send a request to some arbitrary nonexistent server (which won't respond), my client NAT will now have an open channel, correct? Can I then use another (unknown) computer at a different IP address to access that client port if I know both the public and private IP of the client as well as the port number? Or will my NAT check

问题 My services file (C:\WINDOWS\system32\drivers\etc\services) has a bunch of Port to Service mappings: echo 7/tcp echo 7/udp discard 9/tcp sink null discard 9/udp sink null systat 11/tcp users #Active users systat 11/udp users #Active users daytime 13/tcp daytime 13/udp qotd 17/tcp quote #Quote of the day qotd 17/udp quote #Quote of the day chargen 19/tcp ttytst source #Character generator I am trying to find a way to convert from a Port to the Service Name programmatically through Java APIs

问题 I'm playing with boot2docker (docker 1.6) on windows 8.1. I wanted to make myself machine container to play with ruby and I want to be able to connect to rails server from my windows host. To start with small steps first I want to connect to my container from my boot2docker VM. I attach my docker file below, it builds without a problem and I can run a container from it. I do it like so: docker run -it -p 3000:3000 3564860f7afd /bin/bash Then in this container I say: cd ~/myapp && bundle exec