Note that you must BE root on one of the machines in the. May follow the above procedure, except name the file. If you wish ssh access to compton to be similarly unrestricted, then you Add a line containing 'rsh' and a line containing 'rlogin' toД®. You may wish to place the names of other machines that are to have rootДЄccess to compton in this file as well, one name per line.Д. rhosts file (without the double-quotes).Д¬. In /root (root's home directory), create a file called. Liberty and Compton, and that we wish to be able to rsh from Liberty to ComptonДЄs root without having Compton deny access or ask us for a password.ДЄ. Okay, now that THAT's done, and you still want to do this (Butthead!), here'sДЇor the sake of clarity, we will assume we are discussing two machines, Without fully understanding the security ramifications.Дid you read the caution above? Huh? Didja? Well, go back and read it again. shosts for ssh) on machine B will be able toД®xecute any command or program on machine B AS ROOT ON MACHINE B!!! This can beДЄbout as safe as sleeping with an armed nuclear weapon. A mischevous user LOGGED IN AS ROOT at machine A, such that machine A's THIS IS EXTREMELY INSECURE AND CONSTITUTES A SECURITY HOLE THE SIZE OF THE GRANDД¬ANYON. THIS PROCEDURE GIVES ROOT ACCESS WITHOUT A PASSWORD. (Don't forget to do BOTH files, not just rsh.)

This can be accomplished with the chkconfig utility, e.g. Service scripts in /etc/xinetd.d so that the value 'disable = yes' is set to etc/xinetd.d/rlogin so that these daemons will be started when someone tries toД®dit (SEE **NOTE below!!) the /etc/xinetd.d/rsh and the /etc/xinetd.d/rlogin In order for all the above to work, we must configure /etc/xinetd.d/rsh and MAKING IT ALL WORK: TURNING ON THE RSH/RLOGIN DAEMONS. Home was locked, so the child cannot get back in to give you the cup of sugar. Though some act of gross neglect, you have forgotten that the door to your The neighbor gives the sugar to the child and then send her back home, but, To the neighbor to borrow a cup of sugar: The child goes to get the sugar, and Think of this as something like sending your child Permission to execute the command is denied, but rather than permission isД«eing denied by COMPTON to the command's effort to return the results toД¬ompton through RSH. Then LIBERTY will get a 'Permission denied' error. Rsh liberty 'mysql -B -u stupid -e ' show databases ''ДЄnd COMPTON (Yes, I said COMPTON) lacks an appropriate /etc/hosts.equiv file, If Compton wishes to RSH to Liberty and execute a command such as this one: NOTE: If /etc/hosts.equiv is missing or incorrect, Steven won't be able to rsh to The involved machines) into the /etc/hosts.equiv file. To place the names of the machines (or the groups from /etc/netgroup ) that include

(his machine) from atlas, or cluster/compute nodes or other workstations, we need RSH, we would need to place appropriate /etc/hosts.equiv files on each machine.ДЄs another example, if we wish to allow unrestricted access for Steven to Hablar To allow unrestricted access between two machines, liberty and compton, through In order to allow rsh/rlogin without passwords, we must place the hostnames ofДЄll machines which are to be allowed passwordless access in theДЇile on the machine(s)) which is allowing such access. etc/hosts.allow, we are allowing only machines on the 192.168.0. Note also: As /etc/hosts.allow overrides /etc/ny, we are first settingДЄ filter that denies EVERYONE access to the machine, and then, with Services to allow, it is somewhat less secure. It'sДЄ bit easier to write, but since it doesn't specifically enumerate the Note: The default hosts.allow file provided at atlas:/root/bin contains Therefore requires an entry in the /etc/hosts.allow file. Note that we are using the OPENSSH provided with RedHat. In /etc/hosts.allow, please add the following: This should be the only line in the /etc/ny file. From: How to turn on RSH and RLOGIN with RedHat 7.3 in three easy steps Become Root.

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