What Is FTP? More On FTP
Some FTP software also implements a DEFLATE-based compressed mode, sometimes called "Mode Z" after the command that enables it.
"This mode was described in an Internet Draft, but not standardized."
Let's take a look at Other FTP Features and related stuff:
- NAT and Firewall Traversal
- Anonymous FTP
- Login
NAT and Firewall Traversal
FTP normally transfers data by having the server connect back to the client, after the PORT command is sent by the client. This is problematic for both NATs and firewalls, which do not allow connections from the Internet towards internal hosts.
For NATs, an additional complication is that the representation of the IP addresses and port number in the PORT command refer to the internal host's IP address and port, rather than the public IP address and port of the NAT.
There are two approaches to this problem. One is that the FTP client and FTP server use the PASV command, which causes the data connection to be established from the FTP client to the server.
This is widely used by modern FTP clients. Another approach is for the NAT to alter the values of the PORT command, using an application-level gateway for this purpose.
Anonymous FTP
A host that provides an FTP service may provide anonymous FTP access. Users typically log into the service with an 'anonymous' (lower-case and case-sensitive in some FTP servers) account when prompted for user name.
Although users are commonly asked to send their email address instead of a password, no verification is actually performed on the supplied data.
"Many FTP hosts whose purpose is to provide software updates will allow anonymous logins."
Login
FTP login utilizes a normal username and password scheme for granting access. The username is sent to the server using the USER command, and the password is sent using the PASS command.
If the information provided by the client is accepted by the server, the server will send a greeting to the client and the session will commence.
If the server supports it, users may log in without providing login credentials, but the same server may authorize only limited access for such sessions.
Today, I simply want to upload images from my computer files to my wordpress site. Usually this is a simple step, but for unknown reason my images will not load occasionally and not right now.
I am advised by WA Support to do the training about FileZilla and FTP. No clue what either of them are, except for what you have explained in this training.
I've been uploading images to this same website for 3 years without filezilla or ftp.
I am not in the mood for technical training and I have my fingers crossed that you have a simple suggestion so that I can just get on with adding images and posting content.
Ignore my frustration and thanks for any advice.
Janelle
Reply
Some other times, just like me that still continue learning, this kind of technical stuff if we understood more, can help our life easier.
Just take a step at once learning, my friend. Everybody is the coaching hands right here at WA. I could learn from you too, my friend. Cheers! :)
Just because the service has its own vulnerability in a certain aspect and if ever anybody come across this service and kinda gets stuck with vulnerability issue, they can always fall back to this introduction and tutorials.
Thanks and welcome :)
It is the reason take closer interest and get involve with the memmbers for dot.org site let say to understand further its vulnerability among others.
It is really good tools to develop the direct from our owh system and network... next i think i will cover on security issues and also host of FTP providers etc for easy references.
Some other times, i found out certain review on open softwares etc not being kind to these group, team, or guys.
But not all or I mean this is subjective. Opinion of course divided but I'm giving the point of through my direct approach or engagement etc. It is a two sided world of free tools etc and world of capitalism where even a piece of advice has it own invoicing.
