This page will attempt to provide you with as much port information as possible on TCP Port TCP Port may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. Think of it as the language spoken between computers to help them communicate more efficiently. Protocol HTTP for example defines the format for communication between internet browsers and web sites.
Here is what we know about protocol TCP Port Connect to the remote host with rlogin Conclusion The reason that we were able to connect remotely without any authentication is because that the rlogin as a service is insecure by design and it can potentially allow anyone to login without providing a password. Rate this:. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:.
Email required Address never made public. Name required. Follow Following. Penetration Testing Lab Join 2, other followers. Sign me up. Already have a WordPress. Log in now. For instance, if you were in a coworker's office and needed to examine files in your home directory, you might log in to your system remotely, from your coworker's system.
However, you would perform an indirect remote login, supplying your own user name. The dependencies between direct and indirect logins and authentication methods are summarized in the following table. When you log in to a remote system, the rlogin command attempts to find your home directory. For example:. However, if the rlogin command finds your home directory, it sources both your. Therefore, after a remote login, your prompt is your standard login prompt, and the current directory is the same as when you log in locally.
For example, if your usual prompt displays your system name and working directory, and when you log in, your working directory is your home directory, your login prompt resembles the following:.
Then when you log in to a remote system, you see a similar prompt and your working directory is your home directory, regardless of the directory from which you entered the rlogin command:. The only difference is that the name of the remote system would substitute for your local system at the beginning of the prompt.
The remote file system is parallel to your home directory. Roles contain authorizations and privileged commands.
Identifies the path to a directory where users' home directories are located. Note that you can enter multiple paths to search more than one home directory at a time. Tells the find command to apply the rm command to all files that are identified by using the matching file name. The find command starts at the designated directory and searches for any file that is named. If it finds such as file, find prints the path on the screen and removes it.
The following example searches and removes. Find out if a remote system is operating by using the ping command. The ping command has a timeout of 20 seconds. Effectively, if it does not receive a response within 20 seconds, it returns the third message. You can force ping to wait longer or less by typing a time-out value, in seconds:. For more information, see ping 1M. Find who is logged in to a remote system by using the rusers 1 command. No options Displays the name of the system, followed by the name of users who are currently logged in to it, including root.
Displays additional information about each user: the user's login window, login time and date, amount of time logged in, and the name of the remote system from which the user logged on.
In the following example, the long version of rusers shows that two users are logged in to the remote system starbug. The first user logged in from the system console on September 10 and has been logged on for hours and 15 minutes. The second user logged in from a remote system, mars , on September Log in to a remote system by using the rlogin 1 command. No options Logs you in to the remote system directly , effectively, with your current user name.
If the network attempts to authenticate you, you are not prompted for a password. If the remote system attempts to authenticate you, you are asked to provide a password. If the operation succeeds, the rlogin command displays brief information about your latest remote login to that system, the version of the operating system that is running on the remote system, and whether you have mail waiting for you in your home directory.
The following example shows the output of a direct remote login to pluto. The user has been authenticated by the network. The following example shows the output of an indirect remote login to pluto , with the user being authenticated by the remote system. Log out from a remote system by using the exit 1 command. This example shows the user smith logging out from the system pluto. Search Scope:. Network Service Overview 2.
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