Linux-Networking Digest #709, Volume #11 Mon, 28 Jun 99 21:13:49 EDT
Contents:
Re: Newbie question ("Aaron Thompson")
webcam with Linux server and Win98 client ("Robert Burnham")
Unusual? Script needed... ("r.tolga")
Re: Routing with Sub-nets ("Aaron Thompson")
Re: Q: Why is "Text file busy"?!? Samba config? (Dale Walker)
Re: change TcpWindowSize ? (Vidar Andresen)
Re: 192.168/16 vs. 10/8 (Todd Knarr)
Re: HELP! Netscape doesn't recognize dialed-up connections (Bill Unruh)
Re: Need help with some networking basics (Monte Phillips)
Re: 3C515 NIC probs (Vidar Andresen)
Re: NE2000 nic, how to turn off pnp (Vidar Andresen)
IP Packet filtering ethernet bridge on Linux? (Ben Russo)
Re: callerID (Silviu Minut)
Re: Simple network problem, maybe for you, not me!! (Bill Unruh)
Re: PPP - What can I tell you to help solve my problem? (Bill Unruh)
----------------------------------------------------------------------------
From: "Aaron Thompson" <[EMAIL PROTECTED]>
Crossposted-To:
comp.os.ms-windows.networking.tcp-ip,comp.os.os2.networking.tcp-ip,redhat.networking.general
Subject: Re: Newbie question
Date: Mon, 28 Jun 1999 17:57:33 -0500
what if you give someone a laptop or some other wireless networking
capability? then, the next time they hook up to the network, they might not
be at the same physical location, and the route from server to client might
be completely different. your mac address forwarding table will give you
junk. that is why those mac caching tables get refreshed like every 30
minutes or something.
as an aside, the issue you have raised is why some layer 2 switches come
with the capability to plug in a blade with routing abilities to turn it
into a layer-3 device. i think cisco uses RSMs, route switch modules or
something like that.
Pim wrote in message <7l877v$dsh$[EMAIL PROTECTED]>...
<snipped some technical jargon>
>....This ability to cache Layer 3 address tables is the key differentiator
>between router accelerators and Layer 2 switching products. Layer 2
switches
>must send all inter-subnet traffic to a router for path resolution, whereas
>router accelerators can intelligently forward traffic based on Layer 3
>information if the address is already contained within its cached address
>tables....
>
>But why ? Besides src/dest IP-addresses, the packets also contains
src/dest.
>MAC-addresses so by using it's MAC address forwarding table the Layer-2
>switch can do the same ?
>Suppose several endstations as well as several other Layer-2 switches are
>connected to a Layer-2 switch. Then the Layer-2 switch is able to "route"
>inter-subnet traffic to the port to which one of the other Layer 2 switches
>is connected to which the target endstation is connected ?????
------------------------------
From: "Robert Burnham" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: webcam with Linux server and Win98 client
Date: Mon, 28 Jun 1999 23:35:09 GMT
I have been pulling what's left of my hairs out on this one.
How do I make a Win98 machine that's networked into my Linux server (static
IP) accessible to the internet? I want to it (win98 box) to be able to send
a video image out on port 5012 from the win98 box through the Linux server
to the internet.
I had it all set up before I was using the Linux server. My Win98 box had a
ISDN connection to the net and was using my static IP address. I was able to
open up a port (5012) and allow internet to see what's on it via a webpage.
When they clicked on one of my homepages, my webcam image was sent them, a
live image, not ftp'd in at intervals.
But since I've switched to using the Linux sever, I've lost the ability to
send out the live images on this port. I love the way Linux handles my
network using IP_Masq.
Do I need to get another static IP address for the Win98 box?
Or is there a way to do this with out one?
--
-=Robert Burnham=-
Homepage= http://www.bobbb.com
------------------------------
From: "r.tolga" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.misc,comp.os.linux.setup,comp.os.linux.x,alt.os.linux
Subject: Unusual? Script needed...
Date: Tue, 29 Jun 1999 02:30:08 +0300
I want a script or a program whatever else,
to control the ppp users' online time.
I want them to have a, say one hour time limit on
the internet. Once the limit is timed out i want the ppp
deamon
to shutdown the modem connection for that user and will not
permit
to have a second, third etc. connection through the modem
that day.
In this case a reboot should not affect the time limit!
Now, is there a program for the above considerations, or an
option
somewhere in the linux box to do that.
If there is not how can it be done? Any ideas?
thanx in advance.
please reply both to discussion and personel.
------------------------------
From: "Aaron Thompson" <[EMAIL PROTECTED]>
Subject: Re: Routing with Sub-nets
Date: Mon, 28 Jun 1999 17:44:44 -0500
put them on the same subnet and ping each other, if that works, then it's
the router. and make sure the router allows icmp packets (ping packets).
if the router doesn't let it through, then it won't work.
Drewiske Kevin J wrote in message ...
>I'm trying to set up subnets using a box running RedHat 5.2. The RedHat
>box has two Intel EtherExpressPro 10+ ethernet cards.
>Eth0 is 192.168.2.1
>Eth1 is 192.168.1.2
>
>I am able to ping Win95 boxes on either subnet, but I cannot ping from one
>sub-net to another. The DOS ping error message is "Destination host
>unreachable".
>
>Physically, all computews are still interconnected at the network hubs. I
>cannot seperate the wire until I get this up and running. (or it this the
>problem).
>
>In looking at the IP-Subnetworking Mini-HOWTO, I cannot find what is
>wrong.
>/proc/ksyms has "001454c0 ip_forward_R49a0223d"
>and
>/proc/sys/net/ipv4/ip_forward is "1"
>
>My route table shows:
>-------
>Kernel IP routing table
>Destination Gateway Genmask Flags Metric Ref Use
>Iface
>192.168.2.0 * 255.255.255.224 U 0 0 16
>eth0
>192.168.1.0 * 255.255.255.224 U 0 0 7
>eth1
>127.0.0.0 * 255.0.0.0 U 0 0 7 lo
>default earth.wrwwlc.co 0.0.0.0 UG 0 0 13
>eth0
>-------
>where earth.wrwwlc.com = 192.168.2.1 and 192.168.1.2
>
>
>ifconfig is showing:
>--------
>eth0 Link encap:Ethernet HWaddr 00:A0:C9:74:E0:DD
> inet addr:192.168.2.1 Bcast:192.168.2.31 Mask:255.255.255.224
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:21467 errors:0 dropped:0 overruns:0 frame:0
> TX packets:6091 errors:0 dropped:0 overruns:0 carrier:1
> collisions:8
> Interrupt:10 Base address:0x300
>
>eth1 Link encap:Ethernet HWaddr 00:A0:C9:8F:24:6A
> inet addr:192.168.1.2 Bcast:192.168.1.31 Mask:255.255.255.224
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:10506 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1615 errors:0 dropped:0 overruns:0 carrier:1
> collisions:2
> Interrupt:11 Base address:0x310
>--------
>
>Can anyone see what my problem is?
>
>Future plans call for a DSL line to be used as a gateway, incorporating a
>Firewall/Proxy server, so I'd like to get this all incoroporated in one
>shot --- if possible.
>
>
>Thanks for your time,
> Kevin Drewiske
>
>*******************************************
> Water Works and Lighting Commission (http://www.wrwwlc.com)
> Engineering Intern
>
------------------------------
From: [EMAIL PROTECTED] (Dale Walker)
Subject: Re: Q: Why is "Text file busy"?!? Samba config?
Date: Mon, 28 Jun 1999 23:28:11 GMT
On Thu, 24 Jun 1999 17:31:06 GMT, Nicholas E Couchman
<[EMAIL PROTECTED]> wrote:
>If you are going to write something, anything that you are going to transfer to
>Linux (ie documents, text, batch files), don't use notepad. You will see why if
>you try to open any text file from Linux on notepad, it doesn't work that
>great. Use MS Word, MS Wordpad, or something like that and save it as a plain
>text format.
TextPad can open and save in both formats easily. In fact, I love the
proggy so much I find i have to do all my editing work on my Windows
box and copy it over to the Linux box.
==================================================================
| Dale Walker London Techno Events |
| [EMAIL PROTECTED] [EMAIL PROTECTED] |
| London, UK http://www.sorted.org/london |
==================================================================
------------------------------
From: [EMAIL PROTECTED] (Vidar Andresen)
Subject: Re: change TcpWindowSize ?
Date: Mon, 28 Jun 1999 01:48:13 +0200
In article <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] (Bio Hazard) wrote:
>On my NT machine, I read about how I can improve my TCP/IP network
>performance by changing the MTU size and TcpWindowSize. The changes I
>made actually tripled my network performance! Now I'd like to do the
>same to my Linux machine, if possible.
>
>I did find out how to change the MTU from within ifconfig, but I'm
>wondering if it's possible to change the TcpWindowSize on Linux.
man route.
window W
Modifier specifies the TCP window size for TCP Con-
nections over this route. This is typically only
used on AX.25 networks and with drivers unable to
handle back to back frames.
>Is it even necessary to modify these settings?
The Ethernet-HOWTO at chap 4 maybe..
Mvh Vidar Andresen
------------------------------
From: Todd Knarr <[EMAIL PROTECTED]>
Subject: Re: 192.168/16 vs. 10/8
Date: 29 Jun 1999 00:16:21 GMT
[EMAIL PROTECTED] wrote:
> [ie modern] terminology is more to remind myself than anything else. I
> figure if I can write "classes no longer exist" enough times, I may stop
> using the terminology myself. :)
When IPv6 starts to come into common use, the "class" terminology will
go away fast. It just doesn't work for colon-hex notation. One reason
I still use it is that there's still tools that require byte-aligned
subnets and understand the old A/B/C ranges, or that automatically
figure netmasks and such if you feed them A/B/C addresses but require
extra configuration if you use CIDR properly.
> Yep. That [among other examples of sensible use of addressing] is why I
> never understand use of 192.168/16 private addresses [unless necessary
> for some reason]. They just aren't as *elegant*.
LIS, depends on the network. At home I've got 5 CPUs, 2 print servers.
The print servers go on one /28, the 4 working CPUs go on a second, the
firewall/gateway machine goes on a third all by itself. I'm never even
going to fill one subnet, let alone all 14 subnets, so I go with the
smallest network type on the principle of the smaller the range of addreses
I use the less likely I am to ever conflict with anyone else. I'd also
pick multiple 192.168.x/24s if I was dealing with a lot of small,
independent networks that needed to connect to each other ( eg. wiring
several dorm rooms together, where each person wants to keep control
of their own room's computers ).
I guess it's "smallest address range that fits the entity involved",
distinguishing between a collection of entities that need to talk to
each other vs. a single entity large enough to need a logical division
into parts to retain admin sanity.
--
Collin was right. Never give a virus a missile launcher.
-- Erk, Reality Check #8
------------------------------
From: [EMAIL PROTECTED] (Bill Unruh)
Crossposted-To: comp.os.linux.setup,comp.os.linux.misc,comp.os.linux
Subject: Re: HELP! Netscape doesn't recognize dialed-up connections
Date: 29 Jun 1999 00:20:25 GMT
In <[EMAIL PROTECTED]> [EMAIL PROTECTED] (U.V. Ravindra) writes:
>However, when I start up Netscape, it doesn't recognize the open
>connection. What could be going wrong? I've tried looking
>everywhere, but I can't see a single place in Netscape where I
>can set anything up with respect to this? If my local xterms
>are able to recognize the existence of the connection, why isn't
>my local Netscape able to do the same thing?
Netscape does not use /etc/hosts. It has its own resolver routines
within netscape, and does not use the one on the system. Thus everything
must be set up in a canonical manner-- DNS in /etc/resolv.conf for
example must be a valid DNS.
------------------------------
From: [EMAIL PROTECTED] (Monte Phillips)
Subject: Re: Need help with some networking basics
Date: Tue, 29 Jun 1999 00:07:23 GMT
The kast question first, thin net has more than enough capacity for
your situation. Now for the networking part. Below are two links I
have tested and I found that if you follow their diorections
explicitly, they will get you network up and running.
This site has a step by step howto for complete setup of samba. steps
for both linux and the win machine. (and they really work <G>)
http://www.sfu.ca/~yzhang/linux/samba/index.html
and this one as well
http://home.talkcity.com/MigrationPath/maguai/samba.html
These sites singly or in combination are nearly guaranteed to get you
networked.
Vikram Prabhu <[EMAIL PROTECTED]> wrote:
>I'm thinking about setting up a lan for my family now that we have 2
>PCs - machine 1 (Celeron 300A with 64MB RAM) and machine 2 (Pentium 75
>with 16MB RAM). What I want to do is have each in a separate room
>(they'll be about 15m apart) and set one up as a proxy/firewall and
>print server for the other while retaining the ability to have local
>users login directly to either machine. I would like to be able to
>remotely login to the server to update software - I guess I would need
>SSH for this. However, I am migrating everyone here to Linux and
>would like to ensure that regardless of the machine they login to they
>are presented with exactly the same interface and file structure so
>they could save a file in their home directory on machine 1 and find
>it there next time they login to machine 2 and vice versa -- the
>network should be transparent to the user. As I understand it
>installing Linux on both machines would just lead to each user having
>2 accounts, one on each computer, and mounting the root partition via
>NFS would just lead to the filesystems on each machine being different
>without doing anything about account details. Obviously, I'm missing
>something here. Can anyone tell where I can find documentation for
>this sort of thing?
>
>The users will almost exclusively be using X applications. Also does
>Thin Ethernet have enough bandwidth to cope with this? Which machine
>should the server be - should it be the faster one with more memory,
>or the other?
------------------------------
From: [EMAIL PROTECTED] (Vidar Andresen)
Crossposted-To: comp.os.linux,comp.os.linux.hardware,comp.os.linux.redhat
Subject: Re: 3C515 NIC probs
Date: Mon, 28 Jun 1999 02:51:39 +0200
In article <c0ud3.9966$[EMAIL PROTECTED]>,
"Don Awalt" <[EMAIL PROTECTED]> wrote:
>Anyone successfully running on the NIC 3C515-TX? Autoprobe did not find it,
>I am kinda lost on how to get the card recognized in RH 6.0...
http://cesdis.gsfc.nasa.gov/linux/drivers/3c515.html for a start.
Mvh Vidar Andresen
------------------------------
From: [EMAIL PROTECTED] (Vidar Andresen)
Subject: Re: NE2000 nic, how to turn off pnp
Date: Mon, 28 Jun 1999 02:05:56 +0200
In article <7kta41$53o$[EMAIL PROTECTED]>, [EMAIL PROTECTED] wrote:
>I was given a machine that seems to have a Novell ne2000 isa pnp card
>inside, but I don't have any of the software that came with the card. It
What brand? Anything on the nic? Does windows run on the machine?
dos it find the card, and if so, as what? A real _Novell_ ne2000 ...
ore a clone?
I've recently seen a 'kne20_12.exe' for a isa-pnp-ne2000 from
kingston. Which let pnp be turned off.
But you need to know what brand you got, and searc for software for
it.. The best solution i guess.
>seems that I have to turn off pnp for this card to be recognized by
>linux. I have changed the jumper settings to a specific irq on the card
Which irq?
In linux does a 'cat /proc/interrupts' show it to be free?
>itself but that does not seem to work, windows still picks it up as pnp.
(Turn off 'boot with pnp-os' in bios. May help. ?? Dont know.)
(Assign the chosen irq 'legacy isa' in bios. May help. ?? Dont know.)
>Is there any utility for dos that I can download that will let me turn
>off pnp for this card and assign it an irq? Is there any other way to do
>it? Thanks,
http://cesdis.gsfc.nasa.gov/linux/diag/ have a setup prog and a
diagnostic/detection prog for isa ne2000.
In linux (read the info about the driver, anyway..) there is a
isapnp** tool. I dont know how it work, and if it will work..
http://cesdis.gsfc.nasa.gov/linux/drivers/3c515.html have some info on
that (another, very different, isa-pnp) card, give it a look.
Anyway http://cesdis.gsfc.nasa.gov/linux/drivers/
(And if the card turns up, some way, post the solution..)
Mvh Vidar Andresen
------------------------------
From: Ben Russo <[EMAIL PROTECTED]>
Subject: IP Packet filtering ethernet bridge on Linux?
Date: Mon, 28 Jun 1999 16:41:06 -0400
I have two linux boxes with two NIC's each
I want to set the boxes up as bridges, but filter the packets
passing through the bridges on qualities such as inbound
destination port and IP address.
Both the internal and external networks are real routeable
Internet networks. I will be portwrapping the internal machines,
but want the additional security layer of firewalls.
I also have two routers presenting an HSRP Virtual IP address,
and RIP broadcasts to the internal network.
On the internal network I have 2 3Com SuperStack 10/100BaseT
24 port ether switches.
My internal network hosts will each have two nics, and be running
routed to listen to the RIP broadcasts from the routers.
The switches should use "spanning tree"?? to find the HSRP address
in the case of a port tranceiver failure...
In effect I want the two Linux boxes to act as packet filtering
cables between the routers and the switches.
Is this possible? Is anyone doing it?
------------------------------
From: Silviu Minut <[EMAIL PROTECTED]>
Subject: Re: callerID
Date: Mon, 28 Jun 1999 20:10:01 -0400
justin P wrote:
> go to www.freshmeat.net and search for Caller ID
> I saw something on there last week.
> justin
>
Good idea! I've found it! Thanks!
>
> Silviu Minut <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]...
> > Is there any callerID program for Linux?
> >
> > Thanks!
> >
------------------------------
From: [EMAIL PROTECTED] (Bill Unruh)
Subject: Re: Simple network problem, maybe for you, not me!!
Date: 29 Jun 1999 00:24:43 GMT
In <[EMAIL PROTECTED]> root <[EMAIL PROTECTED]> writes:
>Ok here it is. I installed RH 6.0, Mandrake 6.0, and COL 2.2. I can't
>get any of them to work on internet if I install network support. I've
>tried every class of IP . If I install without network support Internet
>works fine on each except COL 2.2 which is a different matter. What am
>I doing wrong? Is it best to install without network support and add
>later. The network works great with Win98.
Your network is being set up with a default route to the ethernet card.
pppd will not set up a default route through ppp0 if one exists. So
remove the default route to hte ethernet card
route del default
before running pppd.
(actully, remove it entirely. Eg put route del default at the end of
/etc/rc.d/rc.sysinit)
------------------------------
From: [EMAIL PROTECTED] (Bill Unruh)
Crossposted-To: comp.os.linux.setup
Subject: Re: PPP - What can I tell you to help solve my problem?
Date: 29 Jun 1999 00:37:13 GMT
In <7l8bbs$2n5q$[EMAIL PROTECTED]> Jonathan Guthrie <[EMAIL PROTECTED]>
writes:
]In comp.os.linux.networking Matthew O. Persico <[EMAIL PROTECTED]> wrote:
]> It saddens me to think that on the same box with the same hardware,
]> NT is going to connect to my ISP with no problems and Linux is going
]> to send me debugging.
]> I understand about Open Source vs. Mega Resources. But, it seems
]> to me that by this time SOMEBODY would have written a PPP
]> wizard that can read the byte stream and figure out what the prompts
]> are without having to enter specific strings for a chatscript.
]Why are you setting up Linux to use a chat script? That's hard and
]completely unnecessary. I keep reading about guys who spend weeks
]fiddling with setup programs and chat scripts and whatnot and I've setup
]people manually faster than that by telling them vi keystrokes over the
]phone.
]LOOK, IT'S NOT THAT HARD, PEOPLE!
]You put the passwords in /etc/ppp/pap-secrets and launch pppd after you
]get the "CONNECT" message from the modem.
]> (note - have not yet opened ez-ppp.tar.gz on my disk. Advance
]> info sounds promissing.)
]You know, I setup pon on the master Debian system at work the other day.
]It's an older system and it doesn't have all those fancy setup "wizards".
]It took about an hour to configure pon/poff, ip-up, and the smail
]configuration. Most of that time was spent trying to figure out how to
]get smail to deliver the mail in the foreground because I just wanted the
]link to be up long enough to move mail to the Internet. (It turns out
]that the documentation for that is wrong. C'est la vie.)
]If you would like help learning how it works, send me email. Otherwise,
]stop bitching because you can't be bothered to read the directions.
Another one of those people who have once set up ppp with one ISP and
now is an expert. Look every ISP has decided to do something different
in setting up their authentication. So, your "foolproof" method which
works with one, will not work with the next one. And this kind of
attitude drives newbies nuts. Everyone tells them that
(kppp,ezppp,wvdial,...., vi,...) is dirt easy and they should try that
and when they do, it does not work, and they are frustrated and worried
that maybe their own intelligence has suffered a catastrophic failure
through exposure to Linux.
The problem with ppp and linux is twofold.
a) Modems-- those damn winmodems have trapped many many people.
b) ISPs-- they simply have not settled on some one technique.
PAP, CHAP 05 CHAP 80 CHAP 81, login, login with extra command to start
ppp, login with PAP, login with CHAP xy, .....
And there are very few directions which will handle all these cases. I
have tried to write a document which does step you through all the
possibilities, but I am sure that many find it intimidating (it is about
12 pages long,) and even fail with it (I would like to hear from anyone
who does). But it is not simple. It is not because they have not
bothered to read the directions (which directions? Almost all of the
linux directions date from the days when login authentication was the
norm. Now at least half use pap or chap without any login).
Furthermore, "starting ppp after the CONNECT" also has its traps. If you
set up your chat script with
CONNECT ''
many ISPs will dump you into what looks like a login authentication, but
it is a blind alley. After you log in you are left with a totally dead
connection. You have to use
CONNECT '\d\c'
which does not send a carriage return after it receives the connect.
Anyway, if anyone is interested, that page is at
axion.physics.ubc.ca/ppp-linux.html
and you can also look there to see the mess that is modern ppp login.
The reason windows works is that each ISP makes sure that they supply a
script to all their users which will work with Windows. They do not
bother doing so for Linux (if they even know what that is).
------------------------------
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End of Linux-Networking Digest
******************************
