November 2001 - WLUG - wlug.mailman3.com

Re: [Wlug] Question

by Keith Wright

> From: "Pierce C. Barnard" <pbarnard(a)ultranet.com> > > Hello, I am trying to get my copy of Netscape to work. when I go to access > any website, it gives message that it can not reach a specific server. I > have the dns servers for my ISP but how do I configure Netscape to use > them? Thanks. DNS has nothing to do with Netscape. Start by trying to ping. When ping works it's almost certain that Netscape (and every other network program) works as if by magic. You need to put your nameserver IP address into /etc/resolve.conf thus: search free-comp-shop.com nameserver 208.218.130.4 nameserver 208.218.130.5 your names and numbers will vary. Also try ``nslookup'', and post error messages. -- -- Keith Wright <kwright(a)free-comp-shop.com> Programmer in Chief, Free Computer Shop <http://www.free-comp-shop.com> --- Food, Shelter, Source code. ---

Nov. 6, 2001

Re: [Wlug] Unique ID

by Keith Wright

> From: "Peter Nikolla" <petern(a)hvnnet.com> > > I am tiring to right It only took me thirty seconds to figure that you are trying to write. > a locking mechanism for my program. I wanted to find > something unique on a Linux/Unix system that I could read to lock my code to > that machine. Does anyone know of a call I can make to get an unique ID > like a disk ID, or system ID? Depends on why you want it. If you just need a unique ID, the ``hostname'' command will give you the name of your machine, ``uname -a'' will give you that and more. If you are trying to prevent anybody from copying: (a) that's not the Linux way and I'm not sure I would want to help you if I could. (b) it's impossible anyway, since anybody can patch the kernel to find out what your program is looking for and give it a fake one. -- -- Keith Wright <kwright(a)free-comp-shop.com> Programmer in Chief, Free Computer Shop <http://www.free-comp-shop.com> --- Food, Shelter, Source code. ---

Nov. 6, 2001

Question

by Pierce C. Barnard

Hello, I am trying to get my copy of Netscape to work. when I go to access any website, it gives message that it can not reach a specific server. I have the dns servers for my ISP but how do I configure Netscape to use them? Thanks.

Nov. 6, 2001

Unique ID

by Peter Nikolla

Guys, I am tiring to right a locking mechanism for my program. I wanted to find something unique on a Linux/Unix system that I could read to lock my code to that machine. Does anyone know of a call I can make to get an unique ID like a disk ID, or system ID? thanx Peter N.

Nov. 6, 2001

Re: [Wlug] SSH and tunneling

by Josh Huber

Andy Stewart <andystewart(a)mediaone.net> writes: > I would like to be able to setup some kind of tunnel so that I can > use SSH to log into my machine at home and forward the X11 display. > > Currently, I can successfully SSH into my firewall, and from there > either telnet or SSH into the machine of interest on my home > network. This works OK for text but not for X. > > So, let's say for sake of argument that I am on a computer at the > Linux Showcase in California. How can I set this up so that I can > tunnel through my home firewall to the machine of interest on my > home network and have the X display from the home machine forward to > the machine at the conference? I think its just a matter of syntax > on the SSH command line, but I can't seem to get it right. ssh does X forwarding. For example: ssh -X <hostname> <command> will auto-forward the X connections over the secure connection. Now, if you want to automate it with your firewall, you could do like Chuck suggested, and have iptables forward a connection on an alternate port to an internal machine's port 22. This might be the best way, so you don't have to ssh to the firewall, then ssh to your internal host. but, if you don't mind multiple ssh connections, this works: ssh -C -t -A -X <host1> ssh -t -A -X host2 <command> -C == compression -t == allocate tty (otherwise the second ssh complains there is no terminal. -A == agent forwarding, not sure if you use the agent (it rocks!) -X == X forwarding I do this kind of thing, and it works well. keep in mind, that you may need to enable X forwarding on the server side in /etc/ssh/sshd_config good luck, -- Josh Huber

Nov. 2, 2001

Re: [Wlug] An excellent read for the day

by Skip Gaede

On Tuesday 30 October 2001 08:34 am, Tim Keller wrote: > Hey, its a great read... > > And for the record, I'm using the Arcangeli VM and I like it better than > the "Rik" VM... > > I hope Alan and Linus don't end up forking the kernel, I think it would be > bad for linux. > According to a recent post by Alan Cox, he agrees that the Arcangeli VM is the way to go. Someone replied "So, when are you going to start using the aa VM in your kernels? --Skip

Nov. 2, 2001

Re: [Wlug] SSH and tunneling

by Charles R . Anderson

On Thu, Nov 01, 2001 at 11:17:10PM -0500, Andy Stewart wrote: andystewart> Currently, I can successfully SSH into my firewall, and from there either andystewart> telnet or SSH into the machine of interest on my home network. This works andystewart> OK for text but not for X. You could set up the firewall to do port forwarding to your machine of interest. Then you would just ssh to the firewall on some unused port number (say 33) and the firewall would forward your request to your machine of interest, port 22. I haven't actually done this on Linux (only BSD), but I believe iptables will do it. For ipchains, I've read that you can do it with the ipmasqadm and/por portfw programs, but they don't seem to come with Red Hat...

Nov. 2, 2001

SSH and tunneling

by Andy Stewart

HI gang, I would like to be able to setup some kind of tunnel so that I can use SSH to log into my machine at home and forward the X11 display. Currently, I can successfully SSH into my firewall, and from there either telnet or SSH into the machine of interest on my home network. This works OK for text but not for X. So, let's say for sake of argument that I am on a computer at the Linux Showcase in California. How can I set this up so that I can tunnel through my home firewall to the machine of interest on my home network and have the X display from the home machine forward to the machine at the conference? I think its just a matter of syntax on the SSH command line, but I can't seem to get it right. FYI, I'm using OpenSSH version 2.9.9p2, which I believe is the latest. Thanks in advance, Andy -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

Nov. 2, 2001

Linux Showcase and upcoming WLUG meeting

by Andy Stewart

HI everybody, I will be attending the Annual Linux Showcase in Oakland, CA on Nov 8 - Nov 10. Is anybody else from the group planning to attend? I'm flying out on Nov 3 to see relatives in Los Angeles, and then I'll fly up to Oakland for the conference. I'll be sure to have a trip report for you all at the next WLUG meeting on Wednesday, November 14th. If anybody else has a small presentation that they'd like to give to the group at the next meeting, please let me know before Friday night if possible. See ya later, Andy -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

Nov. 2, 2001