Hi Duane, Bram, and Will: Thank you all for your responses to my email. It was indeed my syntax error. It works now! I changed to "All: 192.168.14." in /etc/hosts.allow so that all PCs on my private LAN can telnet to it. Yes, I am on a private LAN. But I strongly suspect that I have been hacked. I am always using my notebook/RH7.2 to dial-in to the school and connect to the Internet. However, this morning I cannot boot my notebook. I cannot event get into "linux single" mode. Currently I am in "linux emergency" mode. I don't know why this has happened. The only thing I noticed (from /var/log/messages) is that there are three foreign IP addresses that had connected to the system via Annonymous ftp last night (while I was logining in to the school's UNIX system). Though in a panic, I remember the TCP_Wrapper mechanism. Hopefully what I have setup now can keep those jerks out. By the way: Is it reasonablly doable to recover my system? Thanks again! Philip On Mon, 28 Oct 2002, Duane Dunston wrote: > > Hey, > > For that service in /etc/hosts.allow it would go like this: > > in.telnetd : 192.168.14.154 > > Also be sure that telnet is uncommented in /etc/inetd.conf and that it is > running. I have compiled OpenSSH on rh6 and 6.2. Probably want to get in > the habit of using that even though you are probably on a private network. > > On Mon, 28 Oct 2002, Philip Ching (605.734.71) wrote: > > > > > > > Hi, > > > > I have server: RH6.2/192.168.14.157 and > > client: RH6.0/192.168.14.154 > > > > I setup in the server: /etc/hosts.allow > > 192.168.14.154 > > > > and in /etc/hosts.deny > > All: All > > > > But I cannot do telnet from client (192.168.14.154) to the > > server. It says "Connection closed by foreign host" > > > > Why is that? I just follow the book which describes the > > TCP_Wrapper as parse the /etc/hosts.allow first. If there > > is a match then let it in. Otherwise the TCP_Wrapper will > > check the line in /etc/hosts.deny to make a decision. > > > > What did I do wrong? Can some one help me? > > > > Thank you! > > > > Philip Ching > > > > > > ------------------------------------------------------------------------ > > To unsubscribe email security-discuss-request@linuxsecurity.com > > with "unsubscribe" in the subject of the message. > > > > -- > duane > > 'People demand freedom of speech to make up for the freedom of thought > which they avoid.' > - Kierkegaard > > http://www.linuxsecurity.com/feature_stories/feature_story-116.html > http://www.linuxsecurity.com/feature_stories/dsniff-monitoring.html -- Updated Version > http://www.linuxsecurity.com/feature_stories/feature_story-89.html > http://www.linuxsecurity.com/feature_stories/feature_story-88.html > > ------------------------------------------------------------------------ > To unsubscribe email security-discuss-request@linuxsecurity.com > with "unsubscribe" in the subject of the message. > > ------------------------------------------------------------------------ To unsubscribe email security-discuss-request@linuxsecurity.com with "unsubscribe" in the subject of the message.
