Linux-Networking Digest #217, Volume #12 Fri, 13 Aug 99 22:13:43 EDT
Contents:
Re: TIME_WAIT with TCP socket (Rick Jones)
Re: Difficulty with eth0 after Sound Card setup (Jeff Peterson)
I'm going mad!!!! over a Microcom Deskporte 28.8P External Modem ("dude")
Re: VMware - wow! (Luis Paulo)
can't rlogin or rsh from linux box (Pat)
Re: DHCPD problem? ("Manny Vellon")
Buudyphone through a Linux masquerader (Neil kittipalo)
Re: 2 ethernet cards for my IP MASQ server? (Monte Phillips)
Re: please help (Howard Mann)
PPP negotiation failure (ORRIN)
dbs (Daniele Vian)
Re: Linux as a file server ("William B. Cattell")
Re: Send an AT command to modem (Frank da Cruz)
Re: Is 3Com's 3c905B NIC compatible with Linux? (Christian Reuss)
Re: FTP - I don't want an anonymous account (Jan-Albert van Ree)
Linux\UNIX to Windows 9x and NT (Michael Gilbert)
Re: HWAddress -> IP address (Stuart R. Fuller)
Re: Linux as a file server (Carl Fink)
how to setup up 2 or 3 network cards in Red Hat 6? ("geofox")
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Rick Jones)
Crossposted-To: comp.unix.programmer,comp.protocols.tcp-ip
Subject: Re: TIME_WAIT with TCP socket
Date: 13 Aug 1999 19:47:34 GMT
TIME_WAIT is an *integral* part of TCP's correctness algorithms.
The first side to close the connection (ie send the TCP FIN segment)
is the side which will keep a TIME_WAIT. It is there to protect a new
connection with the same "name" (local/remote IP, local/remote port)
from inadvertantly receiving segments from the old connection. (Users
of IP, such as TCP, _must_ protect against datagrams being lost,
delayed, corupted, and/or duplicated.)
If a client application does not explicitly select a local port number
each time it establishes a connection, one will be selected for it by
the stack. Typically, such "ephemeral" or "anonymous" port numbers are
from a particular range of the 65535 possible local port numbers.
On some systems, this range is from 1024 to 5000. On others, this
range is from 49152 to 65535. Either way, if the client attempts to
cycle through connections at a rate greater than:
sizeofportrange
--------------------
length of TIME_WAIT
it can exhaust all the available port numbers within that range.
If the server is the the first to close, you consider the server's
TIME_WAIT length, if the client is the first to close, you consider
the client's. You always (?) consider the clients anonymous port
range.
Some folks, upon encountering this, try to shrink, or circumvent
TIME_WAIT. That is really not the right thing to do. In this case,
what you really want to do is increase the number of ports used by the
client. (or do more work in each connection)
Some systems allow the anonymous/ephemeral port range to be increased.
This is nice in that it does not require a client change. It is not
nice because the client remains at the mercy of the system's tuning.
However, with the exception of reserved ports, it is quite possible
for an application to explicitly select just about any port number,
and try that one. This is nice in that the client becomes decoupled
from the system's tuning. It is not nice because it may mean source
changes to the client.
Explicit selection of port numbers is the approach used by the netperf
TCP_CRR test (www.netperf.org). This was also done in the SPECweb load
generators. Both use port numbers in the range of 5000 to 65535. With
a 60 second TIME_WAIT that allows roughly 1000 connections per second
per client.
If the client does not select its own port numbers from that range,
and is instead constrained to the system's anonymous range of say 1025
to 5000, port number reuse would start once the connection rate
exceeded about 66 connections per second.
Actually, the limit is not so much per client as it is per client IP
address. So, if 1000 connections per second per client is not enough,
adding another IP address to the client is one way to rais the bridge
further. However, at that point, it might be desireable to find a way
to do more work in each connection, to keep the connection rate
tractable.
rick jones
--
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to email, or post, but please do not do both...
my email address is raj in the cup.hp.com domain...
------------------------------
From: [EMAIL PROTECTED] (Jeff Peterson)
Crossposted-To: redhat.config,redhat.networking.general
Subject: Re: Difficulty with eth0 after Sound Card setup
Date: Fri, 13 Aug 1999 23:21:11 GMT
I had the same problem with a modem after setting up the sound card.
I believe you have to go into /etc/isapnp.conf and uncomment cerain
sections that relate to your card for irq's and address. What I did,
which probably was not proper, what comment out all the lines relating
to the sound card. Seemed to work for me. One of these day I will
actually find out what line I actually need to tweak.
------------------------------
From: "dude" <[EMAIL PROTECTED]>
Subject: I'm going mad!!!! over a Microcom Deskporte 28.8P External Modem
Date: Fri, 13 Aug 1999 20:01:54 -0400
Here's the pitch:
Can someone please, please, please help me set this up.I've used
setserial -a -g (even tried autoconfig) to probe the ports and can't find a
damn thing. I've used kppp(?- I think that's what it's called) to try and
find the modem but it tells me that either it can't find anything or it's
busy. How do I get the info on the parallel ports? Is the parallel port what
external modems use? Or is it some com port? I've probed ttyS0-3 and my
modem is not there. I tried the same with cua0-3, same result nothing. Tried
setserial on lp0 and got an error. All I ask is to be able to surf IN linux
to learn it. I don't think this is to much to ask, do you? Since I've been
inside linux( the Xgui-Gnome-works fine, all my drives are there and
mountable, my sound card is working;-)-see, I HAVE been reading the mans-)
I've come to realize it's potential and when I boot Win98 I feel
so........closed in, restricted.....well, I can't really DO anything, it's
all done for me whether I like it or not, linux is cool, I NEED to learn
but, I've been reading mans for 5 days and still my modem is not seen:-( I
read the modem HOWTO at least 480 times and the setserial HOWTO is never to
be forgotten. I've thrown the useless peice of paper it was printed on out
'cause I will rely soley on the burned in imprint upon my poor battered
brain. I've been going to bed at 5 or 6:00 a.m. and getting up at 9 or 10:
a.m. for at least forever. Linux is a great woman but boy is she ever
demanding. She sucks my will and drains my energy at every turn, but, aren't
all wild rides the best? I'm going insane.......I have nightmares about ppp0
and kppp and cua0 the worst are the lp0's they haunt even my waking
moments.....please for the love of sanity(mine) someone help me..........)
Thank You.
Jon
------------------------------
From: Luis Paulo <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.misc,comp.os.linux.setup
Subject: Re: VMware - wow!
Date: Fri, 13 Aug 1999 18:00:59 +0100
Mike Willett LADS LDN X7563 wrote:
>
>
> It certainly is a WOW!! I'm still on 30 day trial.
> So far I've set up a virtual partition with Win95 which vmware
> uses to boot. I've then got my Linux to Samba across my Win 95 D:
> and E: drives which contains my applications and data respectively
> I've got Samba to allow me to print.
>
> Word, Excel & Powerpoint are ok. Access gives licence errors.
> (Maybe ini files ?)
>
> My only "complaints" are
> i) I only posses a 266MHz and 96Mb RAM, which is fine for
> Linux OR Windows but not BOTH!!! (Can't really blame vmware
> for that though - but if they could see their way to giving
> me some extra hardware I won't turn it down).
>
> ii) it takes about 4-5 times longer than normal to shutdown
> Windows. Why is that ?
>
Are you using a raw disk (your real c: disk) or are you using a virtual
disk?
Raw disk virtual machines are very slow, a virtual disk is much better,
and with your hardware
and in virtual disk mode you should get about 50% to 80% of windows
native performance.
The shutdown time you describe is more typical for a raw disk.
> iii) I can't use the floppy from Linux. Vmware takes control of it.
> use the cdrom either from Linux but I have a CD-Writer
> as well so I don't care
>
I believe you can. In your virtual machine window, under "Settings", you
can enable or disable
the floppy and cdrom, thus allowing other VM's or Linux to control it.
> iv) Sync-ing my real C: drive with all those *.ini files and *.dll
> files is a pain in the ass!! Maybe I won't bother attempting it.
>
> v) I can't use it to play Tomb Raider !!!
>
I don't see why not, but I suggest you have a look at vmware newsgroups,
(news.vmware.com) where these matters are discussed in detail, and by
people who knows more about it than me.
Luis Paulo
------------------------------
From: Pat <[EMAIL PROTECTED]>
Crossposted-To: redhat.config,redhat.networking.general
Subject: can't rlogin or rsh from linux box
Date: Fri, 13 Aug 1999 23:30:45 GMT
I'm using Red-Hat 6.0, kernel 2.2.5-15smp
I keep getting this message when I try to rlogin or rsh to another machine
on the network:
rcmd: socket: Permission denied
I checked the dns server and everything is fine. It doesn't work for any
users, or root. Any ideas?
================== Posted via CNET Linux Help ==================
http://www.searchlinux.com
------------------------------
From: "Manny Vellon" <[EMAIL PROTECTED]>
Subject: Re: DHCPD problem?
Date: Thu, 12 Aug 1999 03:31:22 -0700
yes, DHCPCD, the client daemon - my original post incorrectly referred to
DHCPD.
David Crooke wrote in message <[EMAIL PROTECTED]>...
>
>You mean, dhcpcd, right? ;-)
>
>
>--
>David Crooke, Austin TX, USA. +1 (512) 656 6102
>"Open source software - with no walls and fences, who needs Windows
>and Gates?"
------------------------------
From: Neil kittipalo <[EMAIL PROTECTED]>
Subject: Buudyphone through a Linux masquerader
Date: Sat, 14 Aug 1999 07:08:43 +0700
I wonder if anyone has set things up so that a Windows machine can use
Buddyphone when the modem connexion is through a Linux box which is
masquerading. It seems that Buddyphone uses port 700 (and maybe 701).
Any ideas?
Thanks,
Neil
------------------------------
From: [EMAIL PROTECTED] (Monte Phillips)
Subject: Re: 2 ethernet cards for my IP MASQ server?
Date: Sat, 14 Aug 1999 00:09:59 GMT
One card to lan one to your cable.
install ipchains, enable packet forawrding, have your client gateway
set to linux server, and your off the the races.
motorola <[EMAIL PROTECTED]> wrote:
> I have a LINUX that I plan to use as the
>"gateway" (or masq-gate...i dont what exactly to call it) with the
>actual IP address. I will be using a cable modem connection to access
>the internet.
>
>Do I need to have 2 ethernet cards installed in the masq-gate machine or
>can I get by with just the one?
>
>I was hoping I could just put all the machines on the one HUB and
>connect the uplink to the cable rather than connecting the cable to one
>ethernet card and the rest of the LAN to the other card. Please let me
>know. I am fairly new to LINUX, but I am really looking forward to
>setting up my apartment. Thanks.
------------------------------
From: Howard Mann <[EMAIL PROTECTED]>
Subject: Re: please help
Date: 13 Aug 1999 23:29:20 GMT
In article <[EMAIL PROTECTED]>,
Raghav Suri <[EMAIL PROTECTED]> writes:
> i have rh6.0 installed with one ethernet card and modem link to the
> internet
>
> SCENARIO
>
> eth0 (IP 192.168.0.5) is connected to internal network (win98)
> ppp0 (Dynamic IP) is used to connect to the internet
>
> Internet is running fine from my linux box
>
> cannot connect to the internet from win98 machines
>
>
> I am a newbie to ipchains etc.
>
> Kindly help me on how to configure my linux as such that every win98
> machine can taste the internet.
>
> thanks
> raghav
This should get you going : http://rlz.ne.mediaone.net/linux
Cheers,
--
Howard Mann
http://www.newbielinux.com
(a LINUX website for newbies)
Smart Linuxers search at: http://www.deja.com/home_ps.shtml
------------------------------
From: [EMAIL PROTECTED] (ORRIN)
Subject: PPP negotiation failure
Date: Sat, 14 Aug 1999 00:23:15 GMT
I have a copy of SuSE Linux (v6.1) installed on my system.
The major problem is that I can't seen to negotiate a PPP
session to my ISP who is running BSDI BSD/OS 3.0. I can sign-on
OK with my user and password and when the ISP sends 'PPP Ready',
pppd is called, it sends a couple of lines then times out. The
error logs look like this:
Aug 9 15:16:49 notms pppd[410]: pppd 2.3.5 started by orrin, uid 500
Aug 9 15:16:49 notms pppd[410]: Using interface ppp0
Aug 9 15:16:49 notms pppd[410]: Connect: ppp0 <--> /dev/modem
Aug 9 15:16:49 notms pppd[410]: sent [LCP ConfReq id=0x1 <magic 0x330b6914> <pcomp>
<accomp>]
Aug 9 15:16:50 notms pppd[410]: rcvd [LCP ConfReq id=0x2 <mru 1500> <asyncmap
0xa0000> <magic 0x616403e8> <pcomp> <accomp>]
Aug 9 15:16:50 notms pppd[410]: sent [LCP ConfAck id=0x2 <mru 1500> <asyncmap
0xa0000> <magic 0x616403e8> <pcomp> <accomp>]
Aug 9 15:16:52 notms pppd[410]: sent [LCP ConfReq id=0x1 <magic 0x330b6914> <pcomp>
<accomp>]
Aug 9 15:17:19 notms pppd[410]: LCP: timeout sending Config-Requests
Aug 9 15:17:19 notms pppd[410]: Connection terminated.
Aug 9 15:17:19 notms pppd[410]: Hangup (SIGHUP)
Aug 9 15:17:19 notms pppd[410]: Exit.
I get the same result no matter what method I use within Linux,
(kppp, WVDIAL, or ppp-on). My etc/ppp/options file only has
debug in it although I have tried several of the other ppp
options. The resolv.conf file has the proper DNS addresses.
What am I missing here? Can you tell from the above error file
why pppd will not negotiate a ppp session with my ISP
The hardware is the same as used to make a connection in WFWG with
the Trumpet dialer (thats how I get to the internet).
Any help will be greatly appreciated since the SuSE installation
help has told me they have no idea what is wrong.
=============================
Orrin - Long Island, New York
Orrin's Caribbean Index - http://www.orrin.org/carib/
Syosset Camera Club - http://www.orrin.org/syocc/
HS Class Reunion - http://www.orrin.org/wphs/
Our e-mail address is at http://www.orrin.org/email.html
------------------------------
From: Daniele Vian <[EMAIL PROTECTED]>
Subject: dbs
Date: Fri, 13 Aug 1999 16:48:01 -0400
Hi all,
I'm trying to use dbs (distributed benchmarking system), but I can't use
dbs_view for anything else than showing the sequence number ( -sq sr).
If I try to see other parameters like jitter, for example, the perl
script tells me that there is no file to read - I mean, it's missing the
*.jitter file, where * stands for the cmd filename. I supposed, though,
that dbs_view itself generated the *.jitter (or whatever else) file it
needed from the *.t files... Is that wrong? What am I missing?
I'm working on Linux 2.2.10 (redhat6 upgraded), the dbs is the last
non-beta version.
thank you for every hint you could give me...
--
========================================================
Daniele Vian /}/}
, / / }
[EMAIL PROTECTED] \\ .-=.( ( }
\'--" `\\_.---,='
'-, \__/ \___
140 Bay State Road, .-'.-.' \___.'
02215 Boston MA / // /-..___,-`--'
`" `"
========================================================
------------------------------
From: "William B. Cattell" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Crossposted-To: comp.os.linux.misc
Subject: Re: Linux as a file server
Date: Sat, 14 Aug 1999 00:36:42 GMT
Steve Grant wrote:
>
> I am fairly new to Linux and I would eventually like to replace our Novell
> file servers with Linux in a small office environment.
> Is there a Windows 9x client available for this purpose? Something like
> the Novell Client would be wonderful, or is it more complicated than a
> simple client to access files on a Linux server from a windows network?
> If you know of any freely available, I would like to get the URL so I
> could give them a try at home.
>
> Any help would be appreciated.
> Thanks
>
> Steve
>
> ------------------ Posted via CNET Linux Help ------------------
> http://www.searchlinux.com
Right off the bat I'd say you'd be spinning your wheels
quite a bit. NetWare is good for basic file and print
sharing. Linux can do it but you'd have a ton of stuff to
do to get there. IMHO a switch like that would have a bad
ROI. If you needed to put a web server online, a database
server, etc. then Linux would definately give you a good
ROI. FWIW.
Bill
(14 yrs w/NetWare, 5 yrs w/Linux)
--
==============================================================
http://members.home.com/wcattell
==============================================================
Park not thy Harley in the darkness of thine garage, that it
may collect dust for want of being oft ridden. Ride thy
Harley
with thy brethren, and rejoice in the spirit of the road.
==============================================================
------------------------------
From: [EMAIL PROTECTED] (Frank da Cruz)
Subject: Re: Send an AT command to modem
Date: 13 Aug 1999 20:54:52 GMT
In article <[EMAIL PROTECTED]>,
Chris Mahmood <[EMAIL PROTECTED]> wrote:
: [EMAIL PROTECTED] (David Akins) writes:
:
: > How do I send an ATDT command to the modem from the command line?
: chat -v -- "" atdt8675309 . As far as the rest of the page, I don't
: what you need to do. I think I've seen pager software on sunsite
: before.
:
If the question is about how to send a page, see:
http://www.columbia.edu/kermit/pagers.html
- Frank
------------------------------
From: Christian Reuss <[EMAIL PROTECTED]>
Subject: Re: Is 3Com's 3c905B NIC compatible with Linux?
Date: Sat, 14 Aug 1999 02:40:37 +0200
http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
Cedric Blancher schrieb:
>
> 3Com 3c905b are handled by 3c59x "Vortex (Fast Etherlink
> 3c590/592/595/597) and Boomerang (Etherlink XL 3c900/905)" driver for a
> long time now. This driver is shipped with linux kernel.
------------------------------
From: Jan-Albert van Ree <[EMAIL PROTECTED]>
Subject: Re: FTP - I don't want an anonymous account
Date: Fri, 13 Aug 1999 22:22:43 +0200
Suddn schreef:
>
> How do I make sure that no anonymous users are allowed to FTP into my
> server? I want only real users to be allowed to FTP in.
Check out the ftpaccess file (If it's not there yet, no rules are set and
you will need to make it) You can specify who can log in, where they can do
writes/reads and even when they can or can't log on etc...
More information on the file is in your wu-ftpd documents (and try 'man
ftpaccess' can't test it here since I don't use wu-ftpd. I assume you use
wu-ftpd, if it's not check the docs for your ftp daemon)
--
Jan-Albert "Sliver" van Ree | [EMAIL PROTECTED]
3D Sims Archive maintainer | http://www.3dgamers.com
------------------------------
From: Michael Gilbert <[EMAIL PROTECTED]>
Subject: Linux\UNIX to Windows 9x and NT
Date: Sat, 14 Aug 1999 01:30:47 GMT
Here's a very good question it's very direct........ Could anyone tell me
how to share an internet connection with Windows NT being the the default
gateway. I also need to know how Linux\UNIX can share files with Win9x
and NT. I have S.U.S.E. Linux 6.1 and I'm trying share files between the
Linux and Win9x and NT if the internet sharing plan fails.........
================== Posted via CNET Linux Help ==================
http://www.searchlinux.com
------------------------------
From: [EMAIL PROTECTED] (Stuart R. Fuller)
Subject: Re: HWAddress -> IP address
Reply-To: [EMAIL PROTECTED]
Date: Fri, 13 Aug 1999 21:10:02 GMT
Almer. S. Tigelaar. (almer-t@!SPAMbigfoot.com) wrote:
: Hello,
:
: I am looking for a utility or a 'way' to translate the hardware address of
: an ethernet card into an IP adress.
:
: I am on a LAN and I know someone else is on that LAN too, but all I know is
: his
: Hardware (MAC) address and he does not have a TCP/IP or UDP connection to
: me.
: How do I find out his 'IP address'?
The assumption being that the other machine has an IP address. Amazing as it
may seem, there are other protocols besides IP. There's DECnet, LAT,
Microsoft's stuff, etc., etc.
Then, there's the assumption that there is a 1-to-1 relationship between MAC
address and IP address.
Are you trying to solve a problem, or is this just curiousity?
Stu
------------------------------
From: [EMAIL PROTECTED] (Carl Fink)
Crossposted-To: comp.os.linux.misc
Subject: Re: Linux as a file server
Date: 14 Aug 1999 00:49:45 GMT
Reply-To: [EMAIL PROTECTED]
On 13 Aug 1999 18:30:52 GMT Steve Grant <[EMAIL PROTECTED]> wrote:
>I am fairly new to Linux and I would eventually like to replace our Novell
>file servers with Linux in a small office environment.
>Is there a Windows 9x client available for this purpose? Something like
>the Novell Client would be wonderful, or is it more complicated than a
>simple client to access files on a Linux server from a windows network?
Two people (as I write this) have suggested Samba, which is a valid
suggestion, but if you're already set up for Netware, it's possible
to have Linux emulate a Netware file server, so you wouldn't even
need to change client software.
I have not done this, but a good starting point would be the IPX
HOWTO, visible at the Linux Documentation Project, which is mirrored
at many places including <http://www.viemeister.com/LDP/>.
You will have to compile a custom Linux kernel for this, in all
likelihood. Luckily that's very easy.
--
Carl Fink [EMAIL PROTECTED]
Manager, Dueling Modems Computer Forum
<http://dm.net>
------------------------------
From: "geofox" <[EMAIL PROTECTED]>
Subject: how to setup up 2 or 3 network cards in Red Hat 6?
Date: Sat, 14 Aug 1999 09:48:38 +0800
hi,
any doc. or howto to solve my problem?
any ideas is welcome!
Thanks,
geofox
------------------------------
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