topic Re: .shosts File in Operating System - Linux

.shosts File

dewa — Wed, 11 Jan 2012 06:44:55 GMT

Dear All,

I am using .shosts file for authentication between two Linux hosts. In order to track the usage of this file, I plan to add a comment with "#" sign after this shosts entry. So the file looks like below:

#more .shosts

serverA user1 #For testing purposes

However, after adding the comment with "#" sign, it's caused the passwordless is not working. Can anyone tell me how to add a comment in shosts file?

Thanks and Regards,

Negara

Re: .shosts File

Nighwish — Wed, 11 Jan 2012 09:49:34 GMT

Hello

Why not using the following approach:

Create a local key using ssh-keygen, don't set a password and copy
your .ssh/identity.pub to .ssh/authorized_keys on the remote machine.

Regards

Re: .shosts File

Matti_Kurkela — Wed, 11 Jan 2012 11:21:32 GMT

I looked at the sshd source code. In OpenSSH-5.9p1, the .rhosts and .shosts files are processed by the check_rhosts_file() function, which is located in source file auth-rhosts.c.

If I read the code correctly, comments are acceptable only if the comment character '#' is the first non-blank character on the line. If a comment is on the same line as a rhosts/shosts entry, the entire line will be ignored and if you have sshd in debug logging mode, you'll get a message "Found garbage in <filename>" in the debug output.

So, this should work:

# For testing purposes
serverA user1
# For other purposes
serverB user2
   # having space and/or tab characters before the comment sign should be acceptable too

Re: .shosts File

dewa — Thu, 12 Jan 2012 00:26:47 GMT

Hi Matti,

This is great. Thanks for your explanation. I got the idea.

Regards,

Dewa

Re: .shosts File

dewa — Thu, 12 Jan 2012 00:28:42 GMT

Hi Nighwish,

Thanks for your answer.

Regards,
Dewa