firewall

问题 Our company will setup mobile devices which use private mobile network (special sim card which blacklist all urls and allow for only specific urls). (Our company has a firewall and it is preventing our enterprise mobile app from sending analytic events to Firebase via the SDK.) We have a scenario to use Firebase-analytic to log user events. So far I am trying to find what are the urls or IP addresses which device will request to firebase-analytics when logging but I could not find any network

问题 I'm using Java to create a client/server application that communicates using TCP. The network that the client is running on has an outbound firewall that prevents the client from connecting to the server. Is there any way/workaround to create a TCP connection through this firewall? I have tried to use common ports that are open such as port 80, 443, and 113, however the firewall appears to drop the connection once it is made (possibly by detecting non-protocol packets). An alternative would

问题 This question already has an answer here : Add firewall rule programmatically (1 answer) Closed 2 years ago . In my Application, i need to block firewall such a way that it should block all the url and allow certain URL, this is the rule i am wring assuming i don't want to block www.google.com , www.facebook.com ipfw 12164 deny tcp from any to any ipfw 12156 allow tcp from any to www.google.com ipfw 12157 allow tcp from any to www.facebook.com but its blocking all the connection, what should

问题 Presently I am doing a project on designing and implementing a firewall. Everything is working fine. Here I am filtering all packets going through a TCP port. But I need to send a custom page if a page is being blocked. Like "Your page is blocked by admin". I don't have any idea how to do it. Can I do it using raw sockets? If so please tell me, how to? But as I know raw socket does not work for sending on Windows XP SP2 and later, is there any other solution? EDIT: I used C++ to create a DLL

问题 Hi all I have successfully installed Oracle 11g Express addition on a Linux VM (google cloud compute) I have sqlplus working and I can query data. The listener is also working. But as there is no GUI with Linux servers I cannot try local host and external machines have the connection refused. My Questions are: 1) Does Apex come pre-installed on Oracle XE it used to but not mentioned anywhere. 2) if the ip address of the server is 123.123.123 what url would I use to get to apex from a remote

问题 I am getting this message when I try to shut eclipse down thru eclipse... I know it is because trying to communicate with the wrong port. But why? It must have something to do with me installing a new firewall (Comodo). However, disabling it did not solve the issue. 回答1: Solution: You are probably using Windows 7 (could be 32 bit). Uninstall Avast/AVG antivirus. See link: http://tomcat.10.n6.nabble.com/Fwd-Re-Invalid-command-SHUTDOW-received-td2076295.html I've switched to Comodo (antivirus +

问题 How can I make a Winsock program accept connection requests only from specific addresses? I would like denied connections to be ignored completely rather than get a TCP rejection. 回答1: To make a Winsock program accept connections from only particular IP addresses, use the conditional accept mechanism of WSAAccept(). First, enable the feature: SOCKET sd = socket(...); listen(sd, ...); DWORD nTrue = 1; setsockopt(sd, SOL_SOCKET, SO_CONDITIONAL_ACCEPT, (char*)&nTrue, sizeof(nTrue)); Then, modify

问题 Does a firewall running on a machine only block stuff from outside that machine, or do they block communication between processes on a machine communicating via ports? Specifically, I'm writing a windows service which will expose an http RESTful service for other processes on the machine. The service will be running on a non-standard port in the dynamic/private range - ie not port 80 or similar. Do I need to worry about any firewall that might be running on the machine? This will be deployed

问题 I have created a GCP compute engine instance with a static external ip address. Machine type: n1-standard-2 (2 vCPUs, 7.5 GB memory). OS is Linux/Debian. My intention is to create a plain Node.js TCP server on the machine. The code is as follows: var net = require('net'); var HOST = '0.0.0.0'; var PORT = 110; net.createServer(function(sock) { console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort); sock.on('data', function(data) { console.log('DATA ' + sock.remoteAddress + ': '

问题 I have a 3rd party firewall blocking VS 2013 Update 2 Remote Debugging. I want our domain admin to open the necessary ports, but there seems to be a discrepancy in the documentation. Online version mentions: DCOM (TCP Port 135) and IPSEC (UDP 4500 / UDP 500) Installed documentation mentions: ...To do so, allow traffic on TCP/IP ports that msvsmon.exe is listening on. By default, these are port 4018 and 4019, where 4018 is used on all operating systems, and 4019 is used only on Windows x64 to