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Full Discussion: securing a remote box
Special Forums Cybersecurity securing a remote box Post 20956 by thehoghunter on Wednesday 8th of May 2002 09:52:11 AM
Old 05-08-2002
First, you have already been hacked - whether it was from an inside source or outside. You need to build a new server (if possible) and replace the old keeping the old for investigation into who did what.

If you can't do that, then disconnect the server, rebuild it, shut off all services after rebuilding but add ssh to the server. Insure your version of Sendmail is set up to not allow relays. Make sure your group is the only one with root. Don't allow root remote logins. Put it back on-line.

Check out the following links:

To check if you are a open-relay:
Network Abuse Clearinghouse

If you are using Sendmail:
Sendmail


Solaris 7 may have the Sunscreen Lite product for free - use it and
read up on securing your Solaris server.


If you are running more than Sendmail on the server, remove the other apps and put them on their own box. The more a hacker has to use against you the worst off you are.
Search Sunsolve BigAdmin
thehoghunter
 

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RLOGIN(1C)																RLOGIN(1C)

NAME
rlogin - remote login SYNOPSIS
rlogin rhost [ -ec ] [ -8 ] [ -L ] [ -l username ] rhost [ -ec ] [ -8 ] [ -L ] [ -l username ] DESCRIPTION
Rlogin connects your terminal on the current local host system lhost to the remote host system rhost. Each host has a file /etc/hosts.equiv which contains a list of rhost's with which it shares account names. (The host names must be the standard names as described in rsh(1C).) When you rlogin as the same user on an equivalent host, you don't need to give a password. Each user may also have a private equivalence list in a file .rhosts in his login directory. Each line in this file should contain an rhost and a username separated by a space, giving additional cases where logins without passwords are to be permitted. If the originating user is not equivalent to the remote user, then a login and password will be prompted for on the remote machine as in login(1). To avoid some security problems, the .rhosts file must be owned by either the remote user or root. The remote terminal type is the same as your local terminal type (as given in your environment TERM variable). The terminal or window size is also copied to the remote system if the server supports the option, and changes in size are reflected as well. All echoing takes place at the remote site, so that (except for delays) the rlogin is transparent. Flow control via ^S and ^Q and flushing of input and output on interrupts are handled properly. The optional argument -8 allows an eight-bit input data path at all times; otherwise parity bits are stripped except when the remote side's stop and start characters are other than ^S/^Q. The argument -L allows the rlogin session to be run in litout mode. A line of the form ``~.'' disconnects from the remote host, where ``~'' is the escape character. Similarly, the line ``~^Z'' (where ^Z, control-Z, is the suspend character) will suspend the rlogin session. Substitution of the delayed-suspend character (normally ^Y) for the suspend character suspends the send portion of the rlogin, but allows output from the remote system. A different escape character may be specified by the -e option. There is no space separating this option flag and the argument character. SEE ALSO
rsh(1C) FILES
/usr/hosts/* for rhost version of the command BUGS
More of the environment should be propagated. 4.2 Berkeley Distribution May 12, 1986 RLOGIN(1C)
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