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How can i use iptables on centos 7? [closed]
...am trying to open 80 port for httpd service, but something wrong with my iptables service ... what's wrong with it? What am I doing wrong?
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在app inventor中如果需要退出应用，需要调用哪句代码？ - App Inventor 2 ...
调用控制代码块中的“退出程序”代码块：
退出程序关闭应用程序。
注：只有在编译apk真机运行时，才能退出App，AI伴侣测试的时候无法退出AI伴侣程序。
【解答】网络故障：与AI伴侣通信故障 - App Inventor 2 中文网 - 清泛IT社...
...里做一个解答：
出现此弹窗是因为App Inventor 2服务器端无法连接到AI伴侣导致的，原因是因为手机上退出了AI伴侣App或者手机锁屏了，都可能导致通信断开。
解决：重来一次测试
1、手机退出AI伴侣后，重启启动
2、网页：连...
Appinventor 音效调用播放后没有声音？ - App应用开发 - 清泛IT社区，为创新赋能！
...掉即可。
当然如果因为音频文件损坏等原因，也可能无法正常播放，这时可以先去资源区，点击隐私文件，菜单中选择预览，可以预览播放，事先检查好确保音频文件没有问题。
Regular expression to match DNS hostname or IP Address?
... have a regular expression handy that will match any legal DNS hostname or IP address?
21 Answers
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How do I connect to this localhost from another computer on the same network?
...ing for a computer. So it will try to resolve the name symfony.local to an IP address. It will do this by first looking into the hosts file on your computer to see if he can match an IP address to what you typed in the address bar. If it can't, then it will ask DNS servers. The trick here is to appe...
Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...S server 8.8.8.8 in order to turn the text address of 'google.com' into an IP address. Ironically, 8.8.8.8 is Google's public DNS server. If nslookup fails, public DNS servers like 8.8.8.8 might be blocked by your company (which I assume is for security reasons).
You'd think that adding your compan...
Configure Flask dev server to be visible across the network
...annot access it from other machines on the network (with http://[dev-host-ip]:5000 ). With Rails in dev mode, for example, it works fine. I couldn't find any docs regarding the Flask dev server configuration. Any idea what should be configured to enable this?
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How to find the port for MS SQL Server 2008?
...k on SQL Native Client 10.0 Configuration -> Client Protocols -> TCP/IP
double click ( Right click select Properties ) on TCP/IP.
You will find Default Port 1433.
Depending on connection, the port number may vary.
shar...
Can two applications listen to the same port?
Can two applications on the same machine bind to the same port and IP address? Taking it a step further, can one app listen to requests coming from a certain IP and the other to another remote IP?
I know I can have one application that starts off two threads (or forks) to have similar behavior, but...