Linux-Networking Digest #995, Volume #10 Fri, 30 Apr 99 11:13:27 EDT
Contents:
Re: can't locate module eth1 (Wayne Parrott)
Re: Bridging ether/token ("Curt")
Re: ppp works but no ping ("Keith Wright")
Re: ppp works but no ping ("Keith Wright")
Re: Samba with kernel 2.2.3 ("Prutser")
Re: LOCALHOST question...whoa baby! (Rick)
x.21 protocol ("roger jaeck")
Ethernet Adapter configuration ("Luc Wastiaux")
Re: 2 nic cards help!!! (Xavier Garcia)
Re: How install 2 3C905 PCI on a router ? (Xavier Garcia)
Re: RH 5.2 Ftp question (Marco Machado)
Re: Linux, Win95/98, Samba and "Dial-up Networking" (Marco Machado)
Re: Help: ping ok but can't telnet nor ftp ([EMAIL PROTECTED])
Re: Bridging ether/token (Antonio Catani)
OT: Re: Virus Warining - Just came in (Marcus Siegl)
Re: Buggy 3C574, or buggy administrator? ("-")
PPP ("MAW")
Telnet problem, please help (Paul)
Re: dhcpcd error with 3com 3c900 (Eric)
Samba names (yaniv levy)
Re: Bridge, router, firewall (Ron Black)
Re: Machine name themes - what do you use? (Keven R. Pittsinger)
Re: tcp delayed ack (Andi Kleen)
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Wayne Parrott)
Subject: Re: can't locate module eth1
Date: 30 Apr 99 07:15:51 GMT
I think the alias needs to go before the options line.
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
>I know that solution doesn't work. I have the same problem myself. Here
>is my conf.module file.
>options eth0 io=300 irq=3
>alias eth0 ne
>options eth1 io=340 irq=5
>alias eth1 ne
>I have also tried the append command at the beginning of my lilo.conf
>and ran lilo afterwards. I am kind of stuck myself and would really
>apreciate any help. I have two cards in my redhat 5.2 machine. One is a
>no-name ethernet card. The other is a linksys ethernet card. I have the
>first card setup as a dhcp client. If I change the order of the card in
>conf.modules the first card in conf.modules always gets recognized.
>There seems to be a problem loading the second card. regardless of which
>card I attempt to load second. Is it because both cards are using the
>ne 2000 module? Also my machine is very sparce. Apart from the two
>network cards i have a video card and modem only in it. Any help or
>critique is appreciated
>Wayne Parrott wrote:
>> I think you need to add an alias in /etc/conf.modules
>> like...
>> alias ne eth1
>>
>> [EMAIL PROTECTED] (Jim LaSalle) writes:
>>
>> >I am still trying to get RH 5.2 Linux to recognize a second NIC.
>>
>> >I added append = "ether=0,0,eth1" to lilo.conf and ran lilo
>>
>> >When I reboot these messages appear:
>> > modprobe: can't locate module eth1
>> > Delaying eth1 initialization
>>
>> >Do I have to recompile? Both cards are the same NE-2000 compatible
>> >cards. One is set to 0x300, IRQ10 the other to 0x320, IRQ5. These
>> >resourses have no conflicts. The only difference is one card's
>> >tranceiver is setup for 10baseT the other for 10base2. The eth0
>> >device works fine. It can see and be seen by the network.
>>
>> >I have not progressed to the point where I can assign an IP to the
>> >second NIC
------------------------------
Reply-To: "Curt" <[EMAIL PROTECTED]>
From: "Curt" <[EMAIL PROTECTED]>
Subject: Re: Bridging ether/token
Date: Fri, 30 Apr 1999 06:35:13 -0500
Take a look at http://www.linux-sna.org/
Antonio Catani <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> I try to explain my problem, i have one nt server connected to T/R lan and
ETH
> lan, in tis machine, run SNA server, so, i have to uninstall T/R card from
NT
> server, for some problem, and i have to "route" SNA protocol to talk with
IBM
> Host.
> I tinked, if i make one bridge from different topology, when i call a mac
> address to connect to T/R card on 3745, the bridge take a packet from ETH
lan,
> and deliver it to T/R lan, it's True? o I dont understand nothing?
>
>
>
>
------------------------------
From: "Keith Wright" <[EMAIL PROTECTED]>
Subject: Re: ppp works but no ping
Date: Fri, 30 Apr 1999 07:23:40 -0700
>Are you running this from a GUI or from the "scripts"??
>
>I have the same problem when I try using something like KPPP. If I
>run it from a script, then it works aok.
>
>If you find a solution, I would be interested in hearing about it!!
>
>
>
>>I've done this before on numerous occassions but can't figure out whats
>>going on at this location. I can get ppp to work but I can ping any IP
>>address. I am using Slackware version 3.2 (or is it 3.1?) with kernel
>>2.0.29. I do the following:
Hi,
I'm not using an GUI... only scripts. Today I'm going to try some of the
suggestions proposed by Cliff. I'll let you know what happens.
Keith
------------------------------
From: "Keith Wright" <[EMAIL PROTECTED]>
Subject: Re: ppp works but no ping
Date: Fri, 30 Apr 1999 07:27:22 -0700
Stephan,
It looks like you just copied my post and I didn't see any responses....
maybe I'm missing something?
Keith
------------------------------
From: "Prutser" <[EMAIL PROTECTED]>
Subject: Re: Samba with kernel 2.2.3
Date: Fri, 16 Apr 1999 23:44:31 +0200
You need to upgrade to a later version of SAMBA.
If you're running redhat, you also need to change some compiler switches.
have a look at the samba installation part of my homepage:
http://www.geocities.com/TheTropics/Island/3924/linux/upgrade.html
good luck!
------------------------------
From: [EMAIL PROTECTED] (Rick)
Crossposted-To:
comp.os.linux.misc,comp.os.linux.x,comp.os.linux.questions,linux.redhat.misc
Subject: Re: LOCALHOST question...whoa baby!
Date: Fri, 30 Apr 1999 07:54:32 -0400
brian moore <[EMAIL PROTECTED]> wrote:
> On Thu, 29 Apr 1999 21:40:11 -0400,
> Jason <[EMAIL PROTECTED]> wrote:
> > I've noticed that my host name has been changing after an undetermined
> > amount of time, usually after having worked on top of the X server for
> > some time. Normally, my box is named LOCALHOST, i.e. [ROOT@LOCALHOST
> > /ROOT] or [USER@LOCALHOST /HOME]. After time, however, I've noticed
> > that the name will change to a alpha-numeric type, usually something
> > like "core10d46". It always starts with "core", then has a
> > 2-digit/"d"/2-digit sequence following thereafter.
>
> Like:
> [thorin:~] 8:48:31pm 62 % host 209.150.110.103
> Name: core13d103.toad.net
> Address: 209.150.110.103
>
> > Does anyone know where this might be coming from? Is this a bug that
> > needs to be updated? Does this come from multiple su changes? Does it
> > have something to do with my core dump? It is a consistent problem that
> > I would like to solve. I've noticed that it causes other errors, such
> > as not allowing me to run certain commands, like,
> > /etc/cron.daily/updatedb.cron, almost as if the system recognizes this
> > as another user or machine that doesn't have the permissions or $PATH
> > necessary to perform these commands.
>
> Nope, that's the name that your ISP has assigned to the dynamic IP
> you're on.
>
> You must be using RH: by default, their ppp setup will rename your
> system when you connect to your ISP -if- your systemname is
> 'localhost.localdomain'.
>
> The trick is to go in an add whatever-it-is-you-want-to-name-your-system
> in /etc/hosts as an alias for localhost. Then it will see you have a
> 'proper' name and will cease doing that.
>
> Do note that this -may- have repercussions (things like sendmail will
> think the new address is your real domain, for example), but they
> probably won't matter much because in most cases using a dynamic name
> instead of a proper name is wrong anyway (sending mail would have the
> wrong return address since you don't always get the same dynamic IP).
>
So, I can put, say... home.com in the hosts file, and it wont srew up my
mail? I am using sendmail for send and POP3 for receive.. at leats thats
the way it is set up on my machine.
> > Any information will be greatly appreciated,
> > and will be rewarded in turn with the appropriate alcoholic remedy...
> > ;)
>
> Scotch. It's been a long week.
Drambuie. Better.
------------------------------
From: "roger jaeck" <[EMAIL PROTECTED]>
Subject: x.21 protocol
Date: Fri, 30 Apr 1999 13:50:31 +0200
hello,
does anyone know where I can find x.21 driver for linux. I would like to
connect two nokias sb 256k over a ppp connection.
has anybody an idea how it works?
thanks a lot
roger
------------------------------
From: "Luc Wastiaux" <lucw@*flashmail*.com>
Subject: Ethernet Adapter configuration
Date: Fri, 30 Apr 1999 10:05:29 +0200
Hello,
I'm trying to configure a SN-3200 Ethernet adapater.
distribution is: Mandrake 5.3 (based on Redhat 5.2)
I chose not to configure any network at the time of install, but now I would
like to set it up.
My network card comes with a disk that has a kinuw driver, but
the readme doesn't explain how to install; it says vaguely I have to
type "make config" or something like that.
What should I do?
thanks for helping out a newbie.
--
Luc Wastiaux - lucw@*flashmail*.com
ICQ 4204309
[remove stars to reply via email]
------------------------------
From: Xavier Garcia <[EMAIL PROTECTED]>
Subject: Re: 2 nic cards help!!!
Date: Fri, 30 Apr 1999 09:24:39 +0200
"[EMAIL PROTECTED]" wrote:
> I know that solution doesn't work. I have the same problem myself. Here
> is my conf.module file.
>
> options eth0 io=300 irq=3
> alias eth0 ne
>
> options eth1 io=340 irq=5
> alias eth1 ne
>
> I have also tried the append command at the beginning of my lilo.conf
> and ran lilo afterwards. I am kind of stuck myself and would really
> apreciate any help. I have two cards in my redhat 5.2 machine. One is a
>
> no-name ethernet card. The other is a linksys ethernet card. I have the
>
> first card setup as a dhcp client. If I change the order of the card in
> conf.modules the first card in conf.modules always gets recognized.
> There seems to be a problem loading the second card. regardless of which
>
> card I attempt to load second. Is it because both cards are using the
> ne 2000 module? Also my machine is very sparce. Apart from the two
> network cards i have a video card and modem only in it. Any help or
> critique is appreciated
> Wayne Parrott wrote:
> > I think you need to add an alias in /etc/conf.modules
> > like...
> > alias ne eth1
> >
> > [EMAIL PROTECTED] (Jim LaSalle) writes:
> >
> > >I am still trying to get RH 5.2 Linux to recognize a second NIC.
> >
> > >I added append = "ether=0,0,eth1" to lilo.conf and ran lilo
> >
> > >When I reboot these messages appear:
> > > modprobe: can't locate module eth1
> > > Delaying eth1 initialization
> >
> > >Do I have to recompile? Both cards are the same NE-2000 compatible
> > >cards. One is set to 0x300, IRQ10 the other to 0x320, IRQ5. These
> > >resourses have no conflicts. The only difference is one card's
> > >tranceiver is setup for 10baseT the other for 10base2. The eth0
> > >device works fine. It can see and be seen by the network.
> >
> > >I have not progressed to the point where I can assign an IP to the
> > >second NIC
Just try that :
add : append "ether=0,0,eth1" into your lilo.conf file (in the section of
your actual kernel of course)
This will tell lilo to search an eth1 (0,0 means autodetection) after
finding an eth0.
type "lilo" so lilo add the new parameters.
reboot
bye
Xavier Garcia
------------------------------
From: Xavier Garcia <[EMAIL PROTECTED]>
Subject: Re: How install 2 3C905 PCI on a router ?
Date: Fri, 30 Apr 1999 09:32:11 +0200
frederic pont wrote:
> Hi all,
>
> I try to install 2 PCI NIC (3C905+3C905B) on my Linux (RH5.2 2.2.4) router.. I
> tried everything to avoid irq conflict :
>
> - driver compiled with the kernel (3C59x)
> - module driver, with options lines in conf.modules
> - append="ether=10... in lilo.conf
> - try to change irq with 3c90xcfg.exe from 3com (irq is read only)
> - disable PnP in bios
>
> but both irq are still 9.
> I can run both NIC separetly, but obviously not together.
> and I still need to install a third NIC.. Is somebody running a router with 2
> PCI NIC ? Can somebody explain me how irq works on PCI ?
> Please, please, please help me.. any advices, experiences or comments welcome.
>
> Thanks
> fred
>
> -----------== Posted via Deja News, The Discussion Network ==----------
> http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
Hi,
PCI IRQ are usually (usually only) assigned by slot.
That means that for exemple, PCI slot 1 got IRQ 9, PCI slot 2 IRQ 10 and so on ...
But that sometimes fails:)
so try : append="ether, 0,0,eth1" for lilo.conf, that means autodetection for the
eth1 card.
If it fails, you must manually change the IRQ of one of your card by using jumper
ont he card or software that cames with the cards.
bye
Xavier Garcia
------------------------------
From: Marco Machado <[EMAIL PROTECTED]>
Subject: Re: RH 5.2 Ftp question
Date: Wed, 28 Apr 1999 11:25:52 -0700
Reply-To: [EMAIL PROTECTED]
Jim Bailey wrote:
> I've narrowed this down a bit but still could ude some help. In the
> messages log file I see connect request but it gets denied for lack of
> authentication - also cannot find a file called '/usr/sbin/in.ftpd'. I
> can't find a reference to that file or what it does anywhere.
>
> -- jim bailey
That one is easy. I fixed it just yesterday. Somehow you didn't install
the wu-ftpd RPM. All you need to do is install it from the CD-ROM.
Marco Machado
------------------------------
From: Marco Machado <[EMAIL PROTECTED]>
Subject: Re: Linux, Win95/98, Samba and "Dial-up Networking"
Date: Wed, 28 Apr 1999 11:34:39 -0700
Reply-To: [EMAIL PROTECTED]
Yanko Sheiretov wrote:
>
> > Also, in C:\Windows (or
> > whatever) you add a "hosts" file, with the IPs and names of your lan
> > machines.
>
> Is c:\windows\hosts the correct place for this? Is the format the same as the
>
> unix hosts files? Thanks!
> Yanko
Look at your \windows directory for the HOSTS.SAM file. That's a sample
file, just follow the convention.
Marco Machado
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: Help: ping ok but can't telnet nor ftp
Date: Fri, 30 Apr 1999 11:46:15 GMT
In article <7gbg0p$vj4$[EMAIL PROTECTED]>,
[EMAIL PROTECTED] wrote:
>
>
> I have win98 and linux computers.
> The computers are connected using a crossover UTP.
> I can ping from either machine.
> when I tried to telnet from win98 to linux,
> I got error message "connection to host lost"
> when I tried to ftp from win98 to linux,
> I got error message " connect to x.x.x.x...
> connection closed by remote host"
>
> Any help would be greatly appreciated.
>
> -----------== Posted via Deja News, The Discussion Network ==----------
> http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
>
most probably you need to edit hosts.allow and / or hosts.deny
can you telnet from the linux machine to the linux machine
( i know it makes no sense normally but you can test the inetdaemon this way)
if nothing else helps, tail /var/log/messages on the linux -box,
or try tcpdump - you get lots of new information
============= Posted via Deja News, The Discussion Network ============
http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
------------------------------
From: Antonio Catani <[EMAIL PROTECTED]>
Subject: Re: Bridging ether/token
Date: Fri, 30 Apr 1999 12:47:51 +0200
I try to explain my problem, i have one nt server connected to T/R lan and ETH
lan, in tis machine, run SNA server, so, i have to uninstall T/R card from NT
server, for some problem, and i have to "route" SNA protocol to talk with IBM
Host.
I tinked, if i make one bridge from different topology, when i call a mac
address to connect to T/R card on 3745, the bridge take a packet from ETH lan,
and deliver it to T/R lan, it's True? o I dont understand nothing?
------------------------------
From: Marcus Siegl <[EMAIL PROTECTED]>
Subject: OT: Re: Virus Warining - Just came in
Date: Fri, 30 Apr 1999 10:39:46 +0200
Hi Lee
> |If you receive an email titled "It Takes Guts to Say 'Jesus' DO NOT
> |OPEN
> |IT.
> |
> |It will erase everything on your hard drive. This information was...
>
> hmmm... "X-Newsreader: Microsoft Outlook Express 4.72.3110.1" Ahhh...
> That explains it. :-) Just don't look at mine too closely... :-)
Is this Mailer able to show Animated Gifs inline?
> Lets see, we can attack this one with "hoax" and "urban myth" web
> pages... We can tell him than Linux is virus immune unless he is reading
> e-mail as root. :-) We can smile and laugh, because it beats crying over
> the fact that with the good of Linux going mainstream, we have to take the
> bad of less technical users in the newsgroups. <sigh>
Well, somwhere i have this little animated Gif, which shows a
Downloadbar,
whith is filling. After it is filled, it prints Virus Download complete.
*develish grin*
Bye
--
Marcus Siegl
Tel. : 07071-9457-408, Fax : 07071-9457-110
Post : science + computing GmbH , Hagelocher Weg 71 , 72070 Tuebingen
E-Mail: [EMAIL PROTECTED]
------------------------------
From: "-" <[EMAIL PROTECTED]>
Subject: Re: Buggy 3C574, or buggy administrator?
Date: Fri, 30 Apr 1999 11:53:32 +0200
Hi there,
i'm experiencing the same problem. Card looks fine but when i try to ping
another PC
on the subnet, ping hangs and i get no response.
Maybe there's someon out there who can help is with this problem?
Robert
e-mail: [EMAIL PROTECTED]
Wembley <[EMAIL PROTECTED]> wrote in message
news:sKcW2.811$xg.29@firefly...
>It's my understanding that the 3Com 3C574 PC Card driver for Linux is
buggy.
>Yep, says so right there in SUPPORTED.CARDS. I got this far, though, and I
>don't know if I'm missing something, or if I'm experiencing the effects of
>said buggy driver.
>
>High-pitched beeps on boot (no low tones) seem to indicate that the 574 and
>my Megahertz modem are both fine (modem works fine, btw, including PPP).
>NIC gives link light, /bin/dmesg contains references to it. ifconfig
eth0
>returns the following:
>
>Link encap:Ethernet HWaddr (blah blah)
>inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
>UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC:1
>
>Rx/Tx packets/errors/dropped/overruns/fram/carrier and collisions all 0.
>
>Interrupt:9, Base address:0x300, standard for this card and as far as I can
>tell, not conflicting with anything on my Toshiba 430CDT.
>
>Symptom: It can ping itself successfully, whatever I call it (its NetBIOS
>name, its IP address, or "localhost".) Ping hangs when I try to reach any
>address other than its own, however. Just hangs, no output until I ^C.
>Doesn't see any computer other than itself (self-absorbed, this one).
>
>Is there something obvious that I've missed? Ping (and everything else)
>works fine over PPP, btw.
>
>Complete specs: Tosh 430CDT, PCMCIA 3.0.9, kernel 2.0.36, no sound
config'd,
>no external devices except the modem and 574. Excluded IRQs 0-8 in
>config.opts just to be safe (this thing is generally assigned IRQ 9 by
>Windows, and works fine in W95/98).
>
>Peace -w
>
>
------------------------------
From: "MAW" <[EMAIL PROTECTED]>
Subject: PPP
Date: Fri, 30 Apr 1999 14:09:59 +0100
Hi There,
I am new to the Linux community. My background is NT. I have a small
network. One NT box, one 98 box and one Linux box. At the present time my NT
box handles my e-mail and my automated conenction to the internet through a
Proxy Server. I would like my Linux (Redhat 5.1) to take over this role.
Basically. I want my Linux box to function as a Router/Proxy and
automatically dial my ISP when it needs to - all this need to be done
without my manual intervention.
I have looked at several ways to do this, frommasquerading through to
various other ways. I have to say (and this is not a derogatory remark) that
it all seems rather convoluted to be able to do this. With NT, this kind of
setup is very easy to do. I should point out that my LAN run on the
192.168.1.x subnet.
My Linux box currently has PPP working without any problems. Can anyone
point me in the rght direction?
Thanks
-MAW-
------------------------------
From: [EMAIL PROTECTED] (Paul)
Subject: Telnet problem, please help
Date: Sun, 25 Apr 1999 11:00:19 GMT
Reply-To: [EMAIL PROTECTED]
When I telnet into my ISP's redhat box, telnet works fine with the
built in windows telnet program. However when I telnet into my redhat
box with the same windows telnet program i have all kinds of problems
with my arrow keys and backspace key. If i misstype a command and use
the backspace key to delete, all I get is ^H everytime I hit
backspace. When i'm editing text in vi and use the down arrow to
scroll the page, I get the letter B and it scrolls up. The other
arrow keys print other letters. What is going on here, is there a
config file I need to mess with on my redhat box?
I have tried several different telnet clients and they all do the same
thing. Using vt100. This problem does not exist when telneting into
other servers with any of the other clients.
Any suggestions?
------------------------------
From: Eric <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.hardware
Subject: Re: dhcpcd error with 3com 3c900
Date: Sun, 25 Apr 1999 11:17:07 +0000
Keith W Sheffield wrote:
> I have a 3Com 3c900 pci ethernet card that works under Windows 95.
>
> However I get the following error when I try running dhcpcd 0.70 on
> Linux:
>
> ioctl SIOCSIFFLAGS (ifConfig): Try again
>
> I am running 2.0.36 and here is what is displayed when the machine is
> booted:
>
> eth0: 3Com 3c900 at 0xe800, 00:50:04:72:46:7b, IRQ 9
> 8K byte-wide RAM 5:3 Rx:Tx split, autoselect/NWay Autonegotiation
> interface.
> Enabling bus-master transmits and whole-frame receives.
> 3c59x.c:v0.99E 5/12/98 Donald Becker
> http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
>
ok it seem your card is correctly detected by kernel : good !
>
> Could it be that I have an IRQ conflict or something?
>
> I'd like to get this resolved ASAP so I don't have to use Windows.
>
Zindows really sucks !
>
> Thanks
> --
> Every man's work is a portrait of himself.
>
> Keith Sheffield [EMAIL PROTECTED]
I have the same problem with dhcpcd 0.70, then it vanished when I
upgrade to dhcpcd 1.3.available at ftp://ftp.phystech.com/pub/
------------------------------
From: yaniv levy <[EMAIL PROTECTED]>
Subject: Samba names
Date: Fri, 30 Apr 1999 17:02:18 +0300
I dont understand the relation between DNS names and NetBios Name.
Some questions:
1. for the transport (TCP/IP) layer to work (in general), is it
neccecary that name resolving(DNS or /etc/hosts) will be present (even
if I use just IP numbers) ?
2. I have a Linux router between two subnetworks that also acts as Samba
server and WINS.
Subnetworks have Win95 clients on them. IP is assigned staticly. no name
resolving mechanism is introduced. can i deduce that NetBios resolving
using WINS does not require DNS resolving whatsoever?
3. Since the router between two subnetworks acts as domain master
browser and local browser for both networks. can i stop using WINS?.
4. on the Linux machine. how do i obtain the complete list of machines
on the brows list?
Please email me a copy of your answer.
Thank you very much
Yaniv Levy,
Israel
------------------------------
From: Ron Black <[EMAIL PROTECTED]>
Crossposted-To: comp.protocols.smb
Subject: Re: Bridge, router, firewall
Date: Sun, 25 Apr 1999 08:27:14 -0400
Thanks - I will read the docs and give it a try today..
Vidar Andresen wrote:
> In article <[EMAIL PROTECTED]>, Ron Black <[EMAIL PROTECTED]> wrote:
> >How can this be done ?
>
> /usr/doc/HOWTO/mini/bridge*
>
> Claims to have some solution. And yes, i have a bridge with up to 3
> machines connected to it, in my personal privat network, 10Mbps only,
> no kind of firewall, little security, i have to trust myself that
> much.. so..
>
> I use version bridgex-0.2 bridgex.tar.gz from september 1996. I had
> to install monkeylinux to compile it, and then transfer it to my
> redhat 5.1... well.
>
> How the 2.2.* kernel does this i dont know.
>
> >We are concerned about security and do not completely trust the foreign
> >network. We know that it has been compromised and want to prevent
> >unauthorized entry into our systems via the foreign network.
>
> I am not into that bit of it.
>
> >The foreign network owners have provided us with a router and an ip
> >address of 10.3.204.254. We have installed a linux box that routes
> >between our network 192.168.101.x and the foreigners 10.3.204.x. But we
> >have trouble. The PC's that access both networks use network addresses
> >in the range of 10.3.204.10 to 10.3.204.100 they use a netmask of
> >255.255.255.0. They point to gateways 10.3.204.253 (our linux router
> >box) and 10.3.204.254 (the foreign router).
>
> I dont know if it matters, but the netmask on the class A (10.3.204.*)
> network above is not strictly after the book. My win95 is providing,
> semi-automatically, a 255.0.0.0 netmask on ip-ranges as the 10.3.204.*
> above. How dhcp handles this i dont know.
>
> Net-3-howto:
>
> For administrative reasons some time early in the development of the
> IP protocol some arbitrary groups of addresses were formed into
> networks and these networks were grouped into what are called classes.
> These classes provide a number of standard size networks that could be
> allocated. The ranges allocated are:
>
> ----------------------------------------------------------
> | Network | Netmask | Network Addresses |
> | Class | | |
> ----------------------------------------------------------
> | A | 255.0.0.0 | 0.0.0.0 - 127.255.255.255 |
> | B | 255.255.0.0 | 128.0.0.0 - 191.255.255.255 |
> | C | 255.255.255.0 | 192.0.0.0 - 223.255.255.255 |
> |Multicast| 240.0.0.0 | 224.0.0.0 - 239.255.255.255 |
> ----------------------------------------------------------
>
> >Periodically we experience difficulties on the network wherein the
> >connections to the nt server and the unix app servers are busted. These
> >problems are experienced by machines on both sides of the network. I
> >suspect the problem has something to do with network noise/traffic.
> >Maybe as a result of browsing and wins.
>
> A 10Mbps (?) net shared withouth any switches between hungry machines..
>
> On that (10Mbps ?) i guess a fast 486 with 4 nic's able to take
> whatever comes could work as a cheap switch. And, as the switch
> demands promiscous mode on the cards, it will also give you a point
> where you could listen on 'tcpdump -i eth2' or 'tcpdump -i eth0' or..
> to see where the problem/noise/traffic are taking place.
>
> Things like ntop, iptraf, and so on..
>
> (I use 3com509b and a 486DX2-66. It performes well on 10Mbps.)
>
> >How can we reconfigure the linux router box to make for easier browsing,
> >more reliable and faster network performance while keeping unauthorized
> >foreigners out. I'm sure that we can get a microsoft solution but our
> >management team has asked for a linux solution. Is it possible for the
> >linux box to be a bridge, a router and a firewall all at the same time.
> >If so how ?
>
> /usr/doc/HOWTO/mini/bridge*
>
> Mvh Vidar Andresen
------------------------------
From: [EMAIL PROTECTED] (Keven R. Pittsinger)
Crossposted-To:
vmsnet.networks.misc,microsoft.public.windowsnt.domain,comp.unix.solaris,comp.os.os2.networking.server,comp.os.ms-windows.nt.admin.networking,comp.infosystems.www.servers.unix
Subject: Re: Machine name themes - what do you use?
Date: 17 Apr 1999 02:35:40 GMT
Reply-To: [EMAIL PROTECTED]
In article <01be85c2$e2eb1780$8e0110ac@pgrosset-desk3>,
"Neill" <[EMAIL PROTECTED]> writes:
> In the past we have used the names of pop/rock groups in the past - e.g.
> Aerosmith, Offspring etc.
>
> We also called one "Spice Girls" but it kept going down on us...?
Dood, I just sprayed coffee all over my keyboard!!!
Keven
--
tc++ tm+ tn t4- to ru++ ge+ 3i c+ jt au st- ls pi+ ta+ he+ so- vi zh sy
==============================================================================
Science-Fiction Adventure
In Reavers' Deep
------------------------------
Crossposted-To: comp.os.linux.development.system
Subject: Re: tcp delayed ack
From: Andi Kleen <[EMAIL PROTECTED]>
Date: 30 Apr 1999 16:46:40 +0200
Du Jinsong <[EMAIL PROTECTED]> writes:
Your cross posting is not appropiate.
> Hi!
>
> In kernel V2.2.6, /net/ipv4/tcp_output.c, it seems to me that if not in
> quickack mode, an ACK can been sent out only when ato expires or when a
> data packet need to be sent (so piggyback the ack).
> But the standard algorithm(RFC 2581)says when two data packets received,
>
> one ack need to be sent, right?
Linux 2.2 uses a more complicated algorithm for that. It estimates a
"receive mss" based on incoming packet sizes and forces an ACK when
rcvmss * 2 bytes are received. This gives better behavior for slow serial
lines.
Linux 2.0 used the MSS of the connection for the same algorithm.
The concept of the rcvmss was added with 2.2 to get better
behaviour on links with very high MTU (e.g. HIPPI), where often
implementations send bulk transfer packets with less than the announced
MSS.
> >From tcp_input.c: tcp_delack_estimator(), it seems ato roughly equals
> to
> 1.5*received_packet_interval.
> If what I understanding of tcp_output.c is correct,
> then delayed acks are sent solely according to calculated ato if the
> connection only has one-way traffic.
> Can this improve performance or cause trouble?
> Thanks a lot!
When you have two way traffic you can always piggy back the ack and
you don't need much special ack sending policy.
-Andi
------------------------------
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