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What is the difference between active and passive FTP?
.... Thus, to support this mode, not only should your server have to have multiple ports available, your firewall should also allow connections to all those ports to pass through!
To mitigate the risks, a good solution would be to specify a range of ports on your server and then to allow only that ran...
一文了解大数据领域创业的机会与方向 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
一文了解大数据领域创业的机会与方向跨界和融合是大数据思维里最重要的一环，大数据就像是钱一样，你得让它流动起来才能产生价值。在这篇大数据行业的SWOT分析文章中，也许可以找到你想了解的大数据行业创业环境、问...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
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127.0.0.1 is normally the IP address assigned to the "loopback" or local-only interface. This is a "fake" network adapter that can only communicate within the same host. It's often used when you want a network-capable application to only serve clien...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...TER DATABASE <database_name> CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change table collation:
ALTER TABLE <table_name> CONVERT TO CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change column collation:
ALTER TABLE <table_name> MODIFY <column_name> VARCHAR(255) CHARACT...
Store query result in a variable using in PL/pgSQL
...on't leave out the table name prefix on test_table.name or you'll get complaints about an ambiguous reference.
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Is GET data also encrypted in HTTPS?
...e url? If so, the statement is wrong. There is no way to hide the hostname/IP address from the ISP/proxy server in the same way you cannot hide the destination address while sending physical mail.
– Abhishek Anand
Mar 24 '14 at 21:23
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How to configure PostgreSQL to accept all incoming connections
...e to configure to accept all incoming connections regardless of the source IP address. How can this be configured in the pg_hba.conf file? I'm using postgreSQL version 8.4.
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How do SO_REUSEADDR and SO_REUSEPORT differ?
...sts for the source address, which can be "any address" (0.0.0.0 in case of IPv4 and :: in case of IPv6). Unlike in case of ports, a socket can really be bound to "any address" which means "all source IP addresses of all local interfaces". If the socket is connected later on, the system has to choose...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...-get install nmap
Edit Wired connection on your laptop (Ubuntu)
Change IpV4 settings to "Share to other computers"
Save the setting
Reboot your laptop
Share WiFi connection of your laptop via Ethernet crossover cable
Hook up your RPi with your laptop using the Ethernet cable
Look up the br...
Efficiently test if a port is open on Linux?
From a bash script how can I quickly find out whether a port 445 is open/listening on a server.
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