Linux-Networking Digest #599, Volume #11 Sun, 20 Jun 99 15:13:40 EDT
Contents:
Re: BNC Cable Limit in a peer to peer n/w (Dave Edick)
Re: Linux & Cybercafe (Tristan Wibberley)
Re: can't get dialup connection with RH 6.0 (Clifford Kite)
Re: Possible to mount Samba filesys (smbfs) via ordinary 'mount' command? (Kenny
McCormack)
Re: Network/samba...got it working, but??? (LinuxFool)
Re: PPP - cannot determine remote IP address (Clifford Kite)
Re: How do I create a custom (Menuing) Shell? (Gene Wilburn)
PPP - cannot determine remote IP address (Richard Harding)
Re: multiple DNames per 1 ip address ("Michael Faurot")
DNS related problems (Robert)
Re: What is wrong with this PPP chat session???? (Bill Unruh)
can't get linux to see network! help! (bjack)
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Dave Edick)
Crossposted-To: alt.os.linux
Subject: Re: BNC Cable Limit in a peer to peer n/w
Reply-To: [EMAIL PROTECTED]
Date: Sun, 20 Jun 1999 18:18:01 GMT
On Mon, 21 Jun 1999 02:35:13 +1200, Timothy Clarke <[EMAIL PROTECTED]> wrote:
>
>Leslie Mikesell <[EMAIL PROTECTED]> wrote in message
>news:7kh5fj$1hf9$[EMAIL PROTECTED]...
>> In article <7khuhj$29i$[EMAIL PROTECTED]>,
>> Manohar Singh <[EMAIL PROTECTED]> wrote:
>> >hi there,
>> > I use a small office LAN comprising of 4nodes running on a Linux
>> >server.I now need to connect another computer into this LAN which is
>about
>> >25 mtrs away from the server. I cannot afford to use repeaters or
>expensive
>> >hardware and so can i use a BNC cable to induct this computer into the
>peer
>> >to peer thingy? I use the LAN in a cyber cafe setup to surf the net
>through
>> >a 56 kbps dial up line
>>
>> You can have up to 30 attachments and a total of 185 meters on thinnet
>> coax. Note that a 10BaseT hub is actually a repeater. They are
>> not all that expensive and some include coax connectors if you want to
>> keep your existing segments. Coax should handle your situation but
>> 10Bt tends to isolate problems and it is easy to add and disconnect
>> stations without disturbing the others.
>>
>> > Secondly : what is the maximum distance that a Hub-NIC-BNC cable
>peer
>> >to peer network can sustain at 10base 100 Ethernet LAN ?
>>
>> Hubs are typically simple repeaters. An all-10Meg hub allows the
>> full 185 meters on the coax, 100 meters on each 10BaseT. If it also allows
>> 100Meg, it is acting as a switch although it may combine all of
>> each speed and only act as a switch between the two. There are
>> differences between brands in respect to the way the different
>> speed connections are handled. The 100Bt length is also 100 meters
>> (each) but the cable must be rated at cat 5.
>>
>> Les Mikesell
>> [EMAIL PROTECTED]
>
>I thought that the total length of thinnet (coax) was 500m (hence the
>reason it is used for longer runs)
>A twisted pair can only be 100m between hub and computer (90m cat 5 + 10m
>patch)
>With Thicknet (AUI) having a total length of 1500m and fibers are something
>like 20km without a repeater
>
>Tim
>
>
Tim,
The IEEE 802.3 ethernet specs are very clear on maximum cable length.
Thinnet (10Base2 is the official term) is 185 meters total bus length over
RG-58U coax. Back when Thinnet was the dominant media, a number of ethernet
manufacturers (including 3Com) made all their Thinnet hardware to run overspec
to 1000 feet. It worked well as long as you made sure everything on an
overspec cable run was overspec hardware and only used top quality connectors.
I built an emergency campus network after the 1989 Loma Prieta earthquake by
running overspec thinnet through trees between buildings and putting 3Com
repeaters in each building. Don't try it at home or anywhere else for that
matter. I'm still trying to figure out what kind of drugs they gave me to get
me to agree to it... The squirrels absolutely loved it, it was a new highway
system for them. Yes, squirrels can run on cable that small.
Thicknet (10Base5 is the official term) is 500 meters total bus length over
RG-8U coax. I may have that coax type wrong, it's been a long time since I
have worked with Thicknet.
10BaseF is 2000 meters point to point over 62.5/125 multimode fiber.
10BaseT is 100 meters point to point over Cat 3 twisted pair.
100BaseT is 100 meters point to point over Cat 5 twisted pair.
100BaseF is 500 meters point to point between repeaters (half-duplex) using
62.5/125 multimode fiber and 2000 meters between switches (full-duplex) using
the same media.
There was a broadband coax spec (10Broad20?), but I forget the details on it.
It's obsolete anyway.
There is nothing in the specs about patch cable length. The specs only care
about total cable length. Thicknet and AUI are not the same. AUI refers to
the cable (using a 15 pin D type connector) between a transceiver and the rest
of the ethernet interface. I think the maximum length for AUI cables was 75
meters. There are implementations of fiber ethernet that run over singlemode
fiber that run much longer distances than the official multimode
implementations, but they are not part of the official spec and are probably
not fully interoperable. Due to the collision detection timing limitations of
ethernet, they all require full duplex operation.
If you want more info, Blackbox puts out a lot of PDF documents showing how
various network technologies work, call up the following URL and click on
Ethernet Technology Overview...
http://www.blackbox.com/faxbacks/Indexes/techover.htm
------------------------------
From: Tristan Wibberley <[EMAIL PROTECTED]>
Crossposted-To: alt.uu.comp.os.linux.questions,comp.os.linux.development.system
Subject: Re: Linux & Cybercafe
Date: Sat, 19 Jun 1999 18:15:45 +0100
Reply-To: [EMAIL PROTECTED]
Moritz Moeller-Herrmann wrote:
>
> On 09 Jun 1999 15:19:42 +0100, David Knight <[EMAIL PROTECTED]> wrote:
> >Maurice Kemmann <[EMAIL PROTECTED]> writes:
>
> >> MicroNg schrieb:
>
> >> > however, how to limit the access that so the user can only access the
> >> > browser but NOT any other
> >> > program ? ( to access other program, for eg for the webmaster to shutdown
> >> > the computer, an passcode
> >> > is required).
>
> >> You can configure the windowmanager without any xterm. So the users are
> >> not able to start any other program. On the desktop you offer only the
> >> browser. Login should be via xdm !
> >> That's it i think !
>
> >That it itself probably wont work, just put in netscape
>
> >telnet://localhost
>
> >and it will open an xterm running the telnet session, from which they
> >would then be able to start other programs.
>
> You could just give an extremely limited PATH to the user who runs X. Just
> Netscape and xinit. I think that would stop the telnet thingy. Anyways who
> would allow telnetting in /etc/inetd.conf, if the machine is for a surf
> station? Then I would use a windowmanager without the possibility to call
> xterms or give commands directly. I think icewm could be configured to do
> this. Then give only reading rights to all configuration items.
A limited PATH is not good enough, you need to start netscape from
chroot, and give a limited *filesystem* :)
Now you can have any network services the admin needs (such as ssh)
without worrying about the user using them with netscape. Any non read
only filesystems must have all execute permissions disabled. It would
probably be appropriate to provide a local filesystem for storage of
downloaded files, and give a couple of utilities for users split and
compress them.
--
Tristan Wibberley Linux is a registered trademark
of Linus Torvalds.
------------------------------
From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: can't get dialup connection with RH 6.0
Date: 20 Jun 1999 12:42:27 -0500
Chris Stolte ([EMAIL PROTECTED]) wrote:
: something special I need to do?? I have consulted the NET3 HOWTO, and
: tried everything I can think of!! All relevant config files seem to be
: as they should be. I also tried using linuxconf to activate SLIP and PPP
: interfaces, but this seems to have no effect...
Here's some help and insight:
http://axion.physics.ubc.ca/ppp-linux.html
--
Clifford Kite <kite@inet%port.com> Not a guru. (tm)
------------------------------
From: [EMAIL PROTECTED] (Kenny McCormack)
Crossposted-To: comp.os.linux.misc,comp.os.linux.setup
Subject: Re: Possible to mount Samba filesys (smbfs) via ordinary 'mount' command?
Date: 19 Jun 1999 15:20:57 -0500
Reply-To: [EMAIL PROTECTED]
In article <[EMAIL PROTECTED]>,
Douglas Bollinger <[EMAIL PROTECTED]> wrote:
>
><snip>
>
>I was going to give a go at getting Samba to work with the autofs
>demon. Right now I have things working with a line in rc.local, but
>I was hoping for something a big more eloquent.
>
>So I was reading a bit on how to get this to work in the files. On
>my machine, this is at:
>
>/usr/doc/samba-2.0.3/examples/autofs
....
>Does this sound helpful to you? Note that this is still on my "to
>do" list, so I don't know how well this works.
Yes - this is what I am looking for. I am still running samba-1.9.18p10,
and a 2.0.3x kernel, so I don't have the file you mention above on my
system. Anyway, keep me posted on how this works out - it sounds on-target.
------------------------------
From: [EMAIL PROTECTED] (LinuxFool)
Subject: Re: Network/samba...got it working, but???
Date: Sun, 20 Jun 1999 17:44:45 GMT
On Sun, 20 Jun 1999 07:07:05 +0200, [EMAIL PROTECTED] (Vidar Andresen)
wrote:
Telnet works...I believe I am using Samba...
I installed it, it should start during boot, I just started working
with the smb.conf file...I can think of any reason I can't read files
from one machine to the other...
linuxfool
>In article <[EMAIL PROTECTED]>,
>[EMAIL PROTECTED] (LinuxFool) wrote:
>>Okay I can ping from one machine to another, but in win98 network
>>group I cant see the linux machine ???
>
>You need samba.
>
>telnet?
>
>Mvh Vidar Andresen
------------------------------
From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: PPP - cannot determine remote IP address
Date: 20 Jun 1999 12:52:57 -0500
This makes good reading:
http://axion.physics.ubc.ca/ppp-linux.html
Richard Harding ([EMAIL PROTECTED]) wrote:
: I'm having some problems gettting my connection scripts to work - in an
: attempt to test the basics I have dialed in with minicom, logged on and
: seen the start of the PPP session - then I start pppd but get the
: following from the logs
: Jun 20 18:25:32 localhost pppd[22232]: Serial connection established.
: Jun 20 18:25:34 localhost pppd[22232]: Using interface ppp0
: Jun 20 18:25:34 localhost pppd[22232]: Connect: ppp0 <--> /dev/modem
: Jun 20 18:25:40 localhost pppd[22232]: Could not determine remote IP
: address
There's some problem with the IPCP link negotiations. Sometimes broken
ISPs won't supply a address for pppd to use as the remote address and
adding the pppd option :192.68.0.1 should cure that. Sometimes pppd
is mistakenly configured with the pppd noip option. There are other
reasons that might cause the negotiation of the IP addresses to fail.
Add the pppd debug option and look for a log of the pppd link negotiation
messages. The log files are defined in /etc/syslog.conf, these messages
should be in one of them.
--
Clifford Kite <kite@inet%port.com> Not a guru. (tm)
/* Editing with vi is a lot better than using a huge swiss army knife. */
------------------------------
From: Gene Wilburn <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.admin,comp.os.linux.misc
Subject: Re: How do I create a custom (Menuing) Shell?
Date: Sun, 20 Jun 1999 18:08:23 GMT
Byron A Jeff wrote:
>
> In article <[EMAIL PROTECTED]>,
> John Rappold <[EMAIL PROTECTED]> wrote:
> >Our VMS system allows lets certain groups of users telnet into a custom
> >shell that has a menuing system....they can cursor to items to start an app
> >or press a number.
> >
> >Can someone point me in the right direction on how to setup something like
> >this in Linux? I'm a newbie.
>
> Personally I think the easiest way to start a project like this is to look
> at the system named dialog. It's a set of programs that lets you put up
> decent looking menus, lists, text entry and yes/no type selectors and have
> the results come back to a shell. Let me see if I can motivate a quick example.
> ---------------- Simple program - Cut here ----------
> # Put up the dialog menu. Title goes at the top. Hello is the text before the
> # menu. 15 is height, 74 the width, 10 the number of items on the page. After
> # that The value and the text come in pairs. the 2>/tmp/answer is where the
> # result of the selection is written.
> dialog dialog --title "testing" --menu "Hello" 15 74 10 1 One 2 Two 3 Three \
> 2>/tmp/answer
>
> # Run something based on the answer.
> case `cat /tmp/answer` in
> 1) echo "running program 1";;
> 2) echo "running program 2";;
> 3) echo "running program 3";;
> *) echo "Oops! got an error\n";;
> esac
> ------------- End of program ------------------
>
> It's not exactly right but you get the idea. check out dialog's man page.
> I once wrote a simple accounting application using just dialog and shell
> script.
>
Some while back I used an ISP that had a dandy console-based menu system
using lynx and html pages. It was extremely effective: it popped up when
you logged in. I don't remember the coding very well, but there was
obviously a way to run scripts and drop to the shell prompt (all menu
choices).
Unfortunately this innovative ISP was bought out by a conglomerate with
no imagination or appeal and they shut down the domain in favor of their
own. I switched ISPs.
Gene
--
===================================================================
Gene Wilburn, Northern Journey Online, http://www.interlog.com/~njo
===================================================================
------------------------------
From: Richard Harding <[EMAIL PROTECTED]>
Subject: PPP - cannot determine remote IP address
Date: Sun, 20 Jun 1999 18:48:19 +0100
Hi all
I'm having some problems gettting my connection scripts to work - in an
attempt to test the basics I have dialed in with minicom, logged on and
seen the start of the PPP session - then I start pppd but get the
following from the logs
Jun 20 18:25:32 localhost pppd[22232]: Serial connection established.
Jun 20 18:25:34 localhost pppd[22232]: Using interface ppp0
Jun 20 18:25:34 localhost pppd[22232]: Connect: ppp0 <--> /dev/modem
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-21
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-26
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-24
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-21
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-26
Jun 20 18:25:37 localhost modprobe: can't locate module ppp-compress-24
Jun 20 18:25:40 localhost pppd[22232]: Could not determine remote IP
address
Jun 20 18:25:46 localhost pppd[22232]: Connection terminated.
Jun 20 18:25:47 localhost pppd[22232]: Exit.
have read the how-to and the faq but am none the wiser - any ideas ?
same error occures when I run my ppp-on script
Cheers
Richard
------------------------------
From: "Michael Faurot" <[EMAIL PROTECTED]>
Subject: Re: multiple DNames per 1 ip address
Date: 20 Jun 1999 16:35:18 GMT
Liselotte <[EMAIL PROTECTED]> wrote:
: I've been promoting linux as perfect solution for local .orgs etc. and
: now am "given" an IP address with server to prove it's ability. Need
: help finding answers to following question ASAP:
: Where can I find out how to set-up DNS for multiple domains (such as
: domain1.org, domain2.org et cetera) going to one ip number?
: Machine is running RH 6.0+updates.
: Is the configuration in Bind, or Apache? Or do I add a CGI/Perl
: routine or? Is there a specific phrase that refers to this process?
: I know how to set-up dns master for one d-name per ip address-number,
: and have read O'reilly's DNS + BIND etc., but still unclear about
: procedure/protocol...
Assuming HTTP is the only context for which these domains are used
and you're only concerned with supporting HTTP/1.1 compliant browsers
you merely need to setup multiple virtualhost entries in the Apache
configuration file. To make the various virtual hosts visible as
www.domain1.org, www.domain2.org, etc on the same IP address you need to
have the primary DNS server for each domain create a CNAME alias that maps
to the cannonical name that resolves to the A record for that IP address.
For example, let's say the IP address for this server is 192.168.1.2,
it's part of domain0.org and its A record is defined like this on the
master DNS server which is authoritiative for domain0.org:
server A 192.168.1.2
On the master DNS server which is authoritative for domain1.org, the
following CNAME record would be created:
www CNAME server.domain0.org.
Thus the VirtualHost entry on server.domain0.org might look like this
for www.domain1.org:
<VirtualHost www.domain1.org>
ServerAdmin [EMAIL PROTECTED]
DocumentRoot /some/path
ServerName www.domain1.org
...
</VirtualHost>
--
==============================================================================
Michael | mfaurot | The way to a man's heart is through the left ventricle.
Faurot | atww.org |
------------------------------
From: Robert <[EMAIL PROTECTED]>
Subject: DNS related problems
Date: Sun, 20 Jun 1999 20:52:43 +0200
I have a linux box RH5.2) connected to an ISP via a dial up and a W95
box connected to the Linux box via ethernet. My goal is to be able to
graphically browse the internet and access mail and news from either or
both boxes simultaneously.
I have got to a point where I can access all of the above features via
the Linux box.
I can also Telnet into the Linux box from the W95 box and run lynx to
access the www in text from from the W95 box.
Using telnet., I can also ping any IP address on the www I choose.
I am running kernel 2.0.36 which the HOWTO's etc tell me must use
ipfwadm 2.3 or better.
I have downloaded ipfwadm-2.3.0.tar.gz .
I then executed gunzip ipfwadm-2.3.0.tar.gz and ended up with a file
called:
ipfwadm-2.3.0.tar which was larger.
I then execute tar -x ipfwadm-2.3.0.tar and I get an apparently hung
system until I do ^z
to escape.
Question 1: Am I on the right track with this and what is my syntax
error with tar?
Question 2: executing smbclient -L kids returns information about shared
resources on kids which is my W95 box.
Executing smbmount //kids/c /mnt/kidspc returns a kids: unknown host
message.
Please note:
This is not an idle post. I have downloaded, printed and read all of the
HOWTO's and related help files which are relevant to what I am trying to
achieve. I am very new to Linux and find much of the help documentation
and HOTO contents confusing, since very often one HOWTO leads to another
which leads to another etc.
Thanks to those of you who have assisted me recently and to those of you
who will hopefully assist me again.
regard
Rob
------------------------------
From: [EMAIL PROTECTED] (Bill Unruh)
Crossposted-To: comp.os.linux.setup,linux.redhat.ppp,comp.protocols.ppp
Subject: Re: What is wrong with this PPP chat session????
Date: 20 Jun 1999 19:00:09 GMT
In <[EMAIL PROTECTED]> General Sisyphus <[EMAIL PROTECTED]> writes:
I think your ISP is broken. You could try the option
asyncmap 0xa000
in your /etc/ppp/options. The remote system seems to want that and some
systems apparently go mad if you do not immediately request it yourself.
]I keep getting error reported in my ifconfig output and my downloads
]stall.
]Here's the result of the ppp chat session:
]Jun 18 00:26:27 xena pppd[5382]: pppd 2.3.3 started by iman, uid 500
]Jun 18 00:26:27 xena pppd[5382]: Using interface ppp0
]Jun 18 00:26:27 xena pppd[5382]: Connect: ppp0 <--> /dev/modem
]Jun 18 00:26:27 xena pppd[5382]: sent [LCP ConfReq id=0x1 <magic 0xffff>
]<pcomp> <accomp>]
]Jun 18 00:26:28 xena pppd[5382]: rcvd [LCP ConfReq id=0x1 <mru 1500>
]<asyncmap 0xa0000> <magic 0x3cb94e32> <pcomp> <accomp>]
]Jun 18 00:26:28 xena pppd[5382]: sent [LCP ConfAck id=0x1 <mru 1500>
]<asyncmap 0xa0000> <magic 0x3cb94e32> <pcomp> <accomp>]
]Jun 18 00:26:30 xena pppd[5382]: sent [LCP ConfReq id=0x1 <magic 0xffff>
]<pcomp> <accomp>]
]Jun 18 00:26:30 xena pppd[5382]: rcvd [LCP ConfAck id=0x1 <magic 0xffff>
]<pcomp> <accomp>]
]Jun 18 00:26:30 xena pppd[5382]: sent [IPCP ConfReq id=0x1 <addr
]0.0.0.0> <compress VJ 0f 01>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [IPCP ConfReq id=0x1 <compress VJ
]0f 00> <addr 207.217.148.27>]
]Jun 18 00:26:31 xena pppd[5382]: sent [IPCP ConfAck id=0x1 <compress VJ
]0f 00> <addr 207.217.148.27>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [IPCP ConfNak id=0x1 <addr
]209.179.149.72>]
]Jun 18 00:26:31 xena pppd[5382]: sent [IPCP ConfReq id=0x2 <addr
]209.179.149.72> <compress VJ 0f 01>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [CCP ConfReq id=0x1 < 12 06 00 00
]00 01>]
]Jun 18 00:26:31 xena pppd[5382]: sent [CCP ConfReq id=0x1]
]Jun 18 00:26:31 xena pppd[5382]: sent [CCP ConfRej id=0x1 < 12 06 00 00
]00 01>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [IPCP ConfAck id=0x2 <addr
]209.179.149.72> <compress VJ 0f 01>]
]Jun 18 00:26:31 xena pppd[5382]: local IP address 209.179.149.72
]Jun 18 00:26:31 xena pppd[5382]: remote IP address 207.217.148.27
]Jun 18 00:26:31 xena pppd[5382]: rcvd [CCP ConfAck id=0x1]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [CCP ConfReq id=0x2 < 11 05 00 01
]04>]
]Jun 18 00:26:31 xena pppd[5382]: sent [CCP ConfRej id=0x2 < 11 05 00 01
]04>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [CCP ConfReq id=0x3 < 11 05 00 01
]03>]
]Jun 18 00:26:31 xena pppd[5382]: sent [CCP ConfRej id=0x3 < 11 05 00 01
]03>]
]Jun 18 00:26:31 xena pppd[5382]: rcvd [CCP TermReq id=0x1]
]Jun 18 00:26:31 xena pppd[5382]: sent [CCP TermAck id=0x1]
]Jun 18 00:26:34 xena pppd[5382]: sent [CCP ConfReq id=0x1]
]Jun 18 00:26:34 xena pppd[5382]: rcvd [CCP TermAck id=0x1]
]Jun 18 00:26:34 xena pppd[5382]: sent [CCP TermReq id=0x2"No compression
]negotiated"]
]Jun 18 00:26:34 xena pppd[5382]: rcvd [CCP TermAck id=0x2]
------------------------------
From: [EMAIL PROTECTED] (bjack)
Subject: can't get linux to see network! help!
Date: Sun, 20 Jun 1999 18:16:26 GMT
Someone please help me before I rip all my hair out!!
Here 's the deal:
I can ping myself... loopback and my self-assigned IP (10.0.0.4)
I can't ping the other two computers on my LAN, much less the
Internet. The system running Redhat 6.0 is my own PC, while a Win98
box running a program called NAT32 has dual NICs.
I've got the following setup:
domain: ruthfd1.tn.home.com
default gateway 10.0.0.100
DNS 10.0.0.100
^^^^^^^^^^^^^^^^^^^^^^
this is the way the NAT32 works....and continues to work fabulously
when I boot to win98 on my machine.
netmask 255.255.255.0
My NIC is a 3com 509b. When I try to ping my roommate's system, I see
intermintent flashing on the hub on his line and mine. And when I
try do anything else I see flashing on the server and mine. And when
I boot up, it takes forever.. it hangs for about 5 minutes on:
Starting system log
and Starting sendmail
and when I try to start gnome, it sits there forever "Looking up host
name for Brandon" then eventually says Try Again or Continue? and I
pick continue and it hangs again indefinitely.
help please!!!
i'm going crazy! :-)
Brandon
[EMAIL PROTECTED]
------------------------------
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End of Linux-Networking Digest
******************************
