Linux-Networking Digest #428, Volume #11          Sun, 6 Jun 99 10:13:40 EDT

Contents:
  Re: SuSE Linux 6.1 & ioctl(PPPIOCGUNIT) Operation not permitted error? 
([EMAIL PROTECTED])
  Lost both ethernet cards after placing new motherboard (Wim Van Dijck)
  Re: rshd, rlogind, maybe other daemons, in 2.2.7 (Omri Schearz)
  ISDN under SUSE 6.0 (Dave Peeters)
  ISDN under SUSE 6.0 (Dave Peeters)
  Re: ifconfig error with 3c905 (Malware)
  postgresql starting problem (Philippe L�)
  Re: Routing question (M. Buchenrieder)
  Re: help - we're going berzerk! IP addresses for peers?! (M. Buchenrieder)
  Re: Automatically emailing IP address? (M. Buchenrieder)
  Re: Help! is pci nic compatible with 486 board? (M. Buchenrieder)
  Re: Linux: ICMP Redirect, IP Source Routing unterdruecken (Detlef Bosau)
  Re: Sendmail configuration ("Anders Gulden Olstad")
  TCP/IP checksum formula ("Mygorg")

----------------------------------------------------------------------------

From: [EMAIL PROTECTED]
Crossposted-To: uk.comp.os.linux,comp.os.linux.setup
Subject: Re: SuSE Linux 6.1 & ioctl(PPPIOCGUNIT) Operation not permitted error?
Date: Sun, 06 Jun 1999 11:17:37 GMT

In article <[EMAIL PROTECTED]>,
  "Christopher A. Gaul" <[EMAIL PROTECTED]> wrote:
> Try setting up the pppd parameters with wvdial.tcl.  This is covered
> fairly well starting on page 141 of the SuSE manual.
> Basically if you run:
> wvdialconf   /etc/wvdial.conf   #creates your configuration file
> automatically if it can
> wvdial.tcl (from an Xterm)      #setup your ISP and dialling
parameters
>
> this will create your ppp configuration for you.
> once you run wvdial.tcl you can enter you provider info and hit test.
If
> it works ok hit save. You can then use wvdial to connect to
> your ISP.
>
> Christopher A. Gaul
> CyberDyne Systems
>
> [EMAIL PROTECTED] wrote:
>
> > Hi Fellow (UK) Linux Users
> >
> > Has anyone out there in the UK gotten SuSE 6.1 Linux
> > to connect to the Internet using ordinary DUN?
> >
> > I recently upgraded my old Slackware machine to
> > use SuSE 6.1 and cannot get pppd to work.
> > I can dial into the Demon Internet ROMP line, the modem
> > dials in fine. I get a good connection the but as soon
> > as `pppd' starts I get PPPIOCGUNIT Permission denied
> > errors in the `/var/log/messages' and then the demaon
> > exits.
> >
> > I am using ppp 2.3.5 and kernel 2.2.5 as the default
> > supplied with SuSE Linux 6.1. I verified the permissions
> > of the `/usr/sbin/pppd'. It is most definitely `suid'
> > and I checked also that `ppp' support is compiled
> > in the kernel. I am using root user to do the
> > connection but still get an error. I checked
> > that the `/dev/ttyS2' (COM3) is also a root
> > read/writable, and also symbolically linked `/dev/modem'
> > to `/dev/ttyS2'. So I figure that it must be something
> > to do with `pppd' program.
> > In any case what us a PPPIOCGUNIT anyway?
> >
> > Does anyone have a good summary or crib sheet
> > about making an Internet connection with SuSE Linux?
> > The old demon site Slackware documentation is old
> > and less useful.
> > `ftp://ftp.demon.net/pub/unix/linux/Demon/slack3.0.help.tgz'
> >
> > Thanks
> >
> > Pete Pete
> > on windoze95 partition   \-C  "Waah baby cryin"

Hi

Thanks alot, Chris. I realize from these posting that
I did not provide the correct error message.
The actual failure is `ioctl(PPPIOCGUNIT): Operation not permitted'.

pppd[345]: pppd 2.3.8 started by root, uid 0
pppd[345]: kernel tty_io.c process (345) pppd used obsolete
`/dev/cua2' up date software to use `/dev/ttyS2'
...
...
pppd[345]: Serial connection established
pppd[345]: ioctl(PPPIOCGUNIT): Operation not permitted
pppd[345]: tcsetattr: Operation not permitted
pppd[345]: Exit

I can connect to Demon ISP no problem, it just that
`pppd' dies because the ioctl operation.
I did a complete clean installation of SuSE 6.1 wiping
the Slackware partitions clean. So there any conflicts.
I downloaded pppd 2.5.8 as I said before.
I have also try to find this ubiquitous `/dev/cua2'
settings in the configuration  files
`find /etc -type f -print | xargs grep -n cua2'
but I found no such file. But it must be there.
So I am still stuck, but I will try `wcdial.tcl' anyway.

Thanks anyway
Peter

=======
Home: [EMAIL PROTECTED]
Work: [EMAIL PROTECTED]  (Deutsche Bank UK)
Author of Xsql and FreeInstaller


Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.

------------------------------

From: Wim Van Dijck <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Subject: Lost both ethernet cards after placing new motherboard
Date: Sun, 06 Jun 1999 14:19:24 +0200

Hi all,
I use a RH 5.1 box as a router / firewall for our LAN on our
appartement. We had to change the pc, since it belonged to someone else,
who came to pick it up. I have another 486 now, and I put the same two
ethernet cards in it and the same HD, and changed nothing in the system.
It boots up fine, and RH seems still to be working without hardware
conflicts, but my net cards aren't probed anymore, although one of them
is stated in lilo.conf.
The stangest part (for me anyway, I'm not that much of an expert) is
that the two cards don't even give a green LED when I plug in a working
cable. The cables are postivively alright, the cards have never given
any problems, and I didn't change any of the settings. The IRQ #s are
set with jumpers, and in all the config files, they still are stated as
such, but when I do ifconfig eth0, I get: eth0, unknown device.

How do I solve this?? It took me about a month to set up that machine
(being a newbie then), it worked for a couple of months until the box
was taken away, and now it starts all over again. I'm in my final exam
period too, so I don't have too much time to spend on it. I really hope
somebody knows what this is all about.

Thanks in advance,
Wim


------------------------------

From: Omri Schearz <[EMAIL PROTECTED]>
Subject: Re: rshd, rlogind, maybe other daemons, in 2.2.7
Date: Sat, 05 Jun 1999 17:59:08 -0400

Omri Schwarz wrote:
> 
> Followup:
> 
> since in the rshd man page it says the accept call comes after the
> server looks up the hostname of the client, I'd like to be able
> to do strace on rshd (RedHat 5.0) to see what is going on on the other
> side.
> If anoyne could tell me how to set inetd.conf to allow that I would most
> appreciate that.

Followup yet again:

glibc's gethostbyaddr() appears to be the culprit.
The two machines are on an private LAN, and their MASQ
gateway is down for the moment. Since both have each 
other listed on /etc/hosts, and nswwitch.conf
says 

hosts: files dns
, they should finish the gethostbyaddr() and not
bother with DNS, and yet they still do a DNS lookup,
to a nameserver on the other side of the MASQ gateway,
and then wait for it to timeout, hence the consistent 53 second
delay.

This is in glibc 2.0.7-13


-- 
Omri Schwarz --- omri@GROWl!SPAMBEGONE!nmr.mgh.harvard.edu
Timeless wisdom of biomedical engineering:
"Noise is principally due to the presence of the 
patient." -- R.F. Farr

------------------------------

From: Dave Peeters <[EMAIL PROTECTED]>
Subject: ISDN under SUSE 6.0
Date: Sun, 6 Jun 1999 08:27:44 -0400

Hello everybody

Can anybody help me getting a connection up and running under linux Suse 6.0
using a AVM Fritz/pci ISDN adapter.  I have tried the usual ISDN howto's 
mailed to AVM, mailed to my ISP.  Until now nothing works.  I don't get any 
errormessages etc.  I just can't seem to get a connection.
A URL with some good information would also be very helpful

Thanks

Dave


------------------------------

From: Dave Peeters <[EMAIL PROTECTED]>
Subject: ISDN under SUSE 6.0
Date: Sun, 6 Jun 1999 08:28:08 -0400

Hello everybody

Can anybody help me getting a connection up and running under linux Suse 6.0
using a AVM Fritz/pci ISDN adapter.  I have tried the usual ISDN howto's 
mailed to AVM, mailed to my ISP.  Until now nothing works.  I don't get any 
errormessages etc.  I just can't seem to get a connection.
A URL with some good information would also be very helpful

Thanks

Dave


------------------------------

From: Malware <[EMAIL PROTECTED]>
Subject: Re: ifconfig error with 3c905
Date: Sun, 06 Jun 1999 14:26:26 +0200

Hi Alex,

you wrote:
> I recently got myself a server on the internet running linux. In the server
> i got a 3c905 network card. I then recompiled my kernel to kernel 2.2.9.
> Everything now works fine except that when i run this command
> /sbin/ifconfig eth0:1 208.249.21.105

Wether you have aliases not compiled into the kernel or you are using
outdated net-tools.


Malware

------------------------------

From: [EMAIL PROTECTED] (Philippe L�)
Subject: postgresql starting problem
Date: Sun, 06 Jun 1999 09:39:22 GMT

Hi

I installed the Mandrake 6.0 Linux distribution based on the Red-Hat
6.0.
I automaticaly installes the postgresql program. I want to try out
this
database but I can't connect to it as explained in the doc file, I get
a
message "Missing or mis-configured pg_hba.conf file", this file
doesn't exist
on my computer.
In the doc file there is always made mention of a /usr/local/pgsql
directory,
this directory is not on my computer.
The rest seems fine, the postmaster process is runing and I use the
postgres
account that was automaticaly create to loggon.

So if someone knows what to do I would be very happy.

Thank-you:


Philippe L�
Paris, France
[EMAIL PROTECTED] 

PS: I also tried the initdb command and I get this message 
"initdb does not know where to find the files that make up Postgres
(the
PGLIB directory). You must identify the PGLIB directory either with a
--pglib
invocation option, or by setting the PGLIB enviromment variable, or by
having
a program called 'postconfig' in you search path that outpouts an
asignment
for PGLIB."


------------------------------

From: [EMAIL PROTECTED] (M. Buchenrieder)
Subject: Re: Routing question
Date: Thu, 3 Jun 1999 11:41:24 GMT

[EMAIL PROTECTED] writes:

>     I have a win98 pc (10.10.10.11) and a Linux RedHat 5.2 box
>(10.10.10.10) and an ISP with a gateway of 38.1.1.1. There is a NIC in
>each pc, I have the PPP working fine from Linux and Samba 2.0.x. is
>working. I have to use my default route to 38.1.1.1 on ppp0 to browse
>the internet. I want to be able to browse with the win98 pc through my
>Linux box(eth0). 

[...]

What you need is IP-masquerading. You can't just route IP packets
that way due to the fact that you're using non-routable IP addresses
on your local network. Please refer to the IP-Masquerading-HOWTO .

Michael
-- 
Michael Buchenrieder * [EMAIL PROTECTED] * http://www.muc.de/~mibu
          Lumber Cartel Unit #456 (TINLC) & Official Netscum
    Note: If you want me to send you email, don't munge your address.

------------------------------

From: [EMAIL PROTECTED] (M. Buchenrieder)
Subject: Re: help - we're going berzerk! IP addresses for peers?!
Date: Thu, 3 Jun 1999 11:45:48 GMT

"rocket girl" <[EMAIL PROTECTED]> writes:

>Weve RTFM and still dont see the Linux box in NetworkNeighborhood.

>We have a simple Windows network - where machines can see each others shares
>via the workgroup (on a simple hub - no domain, no nothing but a few win95
>peers without IP addresses).  
 ^^^^^^^^^^^^^^^^^^^^^^^^^^

Does that mean that your Win95 network does not run on TCP/IP ?
If so, forget it. SAMBA (as well as all other TCP/IP based services)
will only run on top of TCP/IP .

>Now we've added a Linux box... to be nothing
>more than another resource (don't really want validation, just a public
>share would suffice).  But... we can only get the machines to ping when
>there is a hosts file on the win95ers, and we're not convinced that this is
>required.  

Uh. Please read some basic texts about networking. Yes, you need a lmhosts
file on each Win95 machine, otherwise name resolution will not work.
Yes, you'll need TCP/IP on all systems installed and running.

>Either way, they still dont see ol' Linux in the Neighborhood.

>Is it absolutely required that the Win95 box has a lmhosts file with the
>Linux's IP?  Why can't this thing resolve machine names on the workgroup
>without knowing explicit IP addresses?

[...]

Because it does not work. There is no name resolution without a way
to resolve Windows machine names to IP addresses.

Michael

-- 
Michael Buchenrieder * [EMAIL PROTECTED] * http://www.muc.de/~mibu
          Lumber Cartel Unit #456 (TINLC) & Official Netscum
    Note: If you want me to send you email, don't munge your address.

------------------------------

Crossposted-To: comp.os.linux.setup
From: [EMAIL PROTECTED] (M. Buchenrieder)
Subject: Re: Automatically emailing IP address?
Date: Wed, 2 Jun 1999 20:59:32 GMT

Ding-Jung Han <[EMAIL PROTECTED]> writes:

>Hi I'm trying to find a way to automatically email the IP address to a
>school machine once my PPP connection is established. Is that possible?
>Or can I make a 'dynamic' webpage telling the IP address of my home
>Linux box?

Write a two-line shellscript that sends the output of "ifconfig"
to your target machine, once the connection has been established.

Michael
-- 
Michael Buchenrieder * [EMAIL PROTECTED] * http://www.muc.de/~mibu
          Lumber Cartel Unit #456 (TINLC) & Official Netscum
    Note: If you want me to send you email, don't munge your address.

------------------------------

From: [EMAIL PROTECTED] (M. Buchenrieder)
Subject: Re: Help! is pci nic compatible with 486 board?
Date: Wed, 2 Jun 1999 20:58:14 GMT

[EMAIL PROTECTED] (Stuart R. Fuller) writes:

[...]

>Wait a minute here.  You know what all the above is impossible.

>According to my "Microsoft Networking Essentials" training, there are no ISA
>100Mb NICs, and there is no PCI for 486?!  Are you saying that the book is
>wrong?

Nah, we all know that MS wouldn't publish something unless they 
had PROOF :))

Psst. Don't tell that to all the owners of 486 boards with PCI slots ...

Michael
-- 
Michael Buchenrieder * [EMAIL PROTECTED] * http://www.muc.de/~mibu
          Lumber Cartel Unit #456 (TINLC) & Official Netscum
    Note: If you want me to send you email, don't munge your address.

------------------------------

Date: 06 Jun 1999 13:22:00 +0200
From: [EMAIL PROTECTED] (Detlef Bosau)
Crossposted-To: de.comm.internet.routing
Subject: Re: Linux: ICMP Redirect, IP Source Routing unterdruecken

[EMAIL PROTECTED] meinte am 06.06.99
zum Thema "Re: Linux: ICMP Redirect, IP Source Routing unterdruecken":

> > abenteuerlich bis grausig. Aber zwei Dinge sind mir klar
> > geworden: Erstens haben die sich _alle_ widersprochen und
> > zweitens weiss das selbst Microsoft vermutlich nicht richtig.
> 
> In der samba doku ist das erstaunlich klar beschrieben.

Zumindest das, was sich die samba-Leute darunter vorstellen und 
was "man so mitkriegt".

Microsoft selber pflegt seine Software nach aussen nicht zu dokumentieren.
Die MCSE-Pruefungen laufen dann nach dem Stil ab:

"Sie haben ein nicht nachvollziehbares, allgemeines Schutzausnahme-
problem mit mittlerem Verletzungsfehler. Was tun Sie?

    a)  Sie lesen die vorzuegliche Microsoft-Dokumentation
        und loesen das Problem.

    b)  Sie formatieren alle Festplatten und installieren alles neu.
  
    c)  Sie wenden Sich an den Microsoft Gold Premium Support. "

Was richtig ist, sagt Dir niemand. Vermutlich ist a) falsch, 
b) akzeptabel und c) richtig. Der Microsfot Gold Premium Support ist
zwar auch nicht in der Lage, das Problem zu loesen, kostet aber
1000,- DM pro PC und Monat und wird Dir gleich nach der MCSE
Pruefung angeboten.

Weist Du, ich glaube Dir ja, dass das in der Samba Doku drinsteht.

Nur wuerde dann ja das sporadisch auftretende Anmeldeproblem bei
einem meiner Kunden, an dem mittlerweile 10 MCSEs sitzen, die _alle_
auch die SAMBA Doku kennen, in langsamen Schritten einer Loesung
entgegenschleichen.

Leider tut es das nicht.


Ich behaupte hier ganz offen: Es gibt nicht mal bei Microsoft
jemanden, der _wirklich_ weiss, wie die Anmeldung unter Windows NT
funktioniert.

Und ich habe vor Jahren einmal massenhaft bei Leuten, die mir erzaehlten,
das liege daran, dass eine Windows NT 3.5 Workstation Master Browser 
waere, aber WfW 3.11 nicht richtig funktioniere etc. wochenlang
den Microsoft-"Fachleuten" folgend Kilometergeld verdient und
bin losgerannt: "Schalten Sie jetzt bitte alle Rechner aus? Und bitte
in folgender Reihenfolge an: Erst Herr Schulze die NT Workstation,
dann Herr Meier die Win95 Workstation, dann alles mit Windows fuer
Workgroups 3.11, dann alle Leute mit Fremd-TCP/IP-Stacks."

Um es kurz zu machen. Die Anwender sind mir gegenueber zwar fast 
taetlich geworden. Aber funktioniert hat es nicht.

Seitdem, und da gebe ich Gert ja vollkommen recht, weiss ich,
dass es mit Unix geht. Mit Windows NT habe ich mir angewoehnt,
_niemandem_ mehr etwas zu glauben. Ich glaube dieses ganze
Zeug nicht. Da ist es mir, ehrlich gesagt, scheissegal, 
was in der SAMBA-Doku drin steht. Wenn ich dem Zeug glaube,
und es genau so mache, wie es da steht, gehen beim Kunden
immer noch 2000 Rechner nicht stabil.

Das liegt nicht an der SAMBA-Doku. Das liegt ganz einfach daran,
dass hier bei Microsoft _nichts_ dokumentiert ist, vermutlich auch
nicht mal intern, dass dort _jeder_ Programmierer regelmaessig
den Editor mit der Toilette verwechselt und den "Output" als
Produkt verkauft, und dass alles, was an Doku kursiert, letztlich
nichts anderes als "ausgespaehtes" Halbwissen aus dreieinhalb
Windows Versionen mit zweieinhalb Patchleveln ist.

Dass mir nach jeder Microsoft Werbeveranstaltung wieder alle dort
eingeladenen erzaehlen, was Herr Dr. soundso in Berlin wieder alles
dargestellt haette, und wie toll das alles war, und wie interessant,
das weiss ich ja nun. Daran bin ich gewoehnt. Und dann funktioniert
wieder _kein_ _einziges_ Tool aus dem Ressource-Kit wie es soll,
dann stimmt wieder _keine_ _einzige_ Doku zu NT, wenn es ins Detail
geht, dann hat Doktorchen, ich kenne den Nachnamen des deutschen
MS-Chefs nicht, zwar mal wieder Grund dazu gegeben, seinen Doktorhut
letztlich mal einzukassieren, weil kriminelle Handlungen wie Betrug
sind mit der Doktorwuerde nicht vereinbar, aber es stimmt dennoch
keine Doku, es funktioniert nichts, es wird wieder nur Halbwissen
proliferiert und beim Anwender sitzt Du da und klickst hilflos
in der Weltgeschichte herum und laesst Dich in den Arsch
treten.

Ich habe dieses Vergnuegen bei so roughly 2000 Anwendern von
der Putzfrau bis zum NT Supporter und bei mehreren mittelstaendischen
Unternehmen unterschiedlichster Branchen hinter mir.

Darum meine Aussage: Ich stecke MS in Quarantaene, das gibt kleine,
abgetrennte Netzchen, da kann das Zeuch hemmungslos rumsauen, das 
stoert mich nicht. Ich lebe mit MS, das tun viele andere auch,
ich achte darauf, dass mir MS mein Netz nicht zu sehr kaputt macht,
ich sperre MS in den Kaefig. Ansonsten habe ich grundsaetzlich
beschlossen, dass ich nicht weiss, was Microsoft ist. Wenn
da auch nur die Hintergrundfarbe meines Bildschirms zu aendern ist,
hole ich den NT-Support. Ich selber fasse das Zeug nicht an.
Meine Mitarbeiter im Netz auch nicht. NT Support druecke ich gnadenlos
den Leuten vom NT Support ab. Fuer diesen Schleudersitz lasse ich
mich halt nicht verhaften.

Es gilt immer noch der Satz:

"If builders built buildings like programmers write programms,
any woodpecker, that came along, would destroy human civilization."

Und daraus leite ich den Hauptsatz des Softwaresupport ab:
"Wenn Du schon selber nicht alle Programmierer der Welt austauschen
kannst, achte wenigstens darauf, nie fuer einen Specht gehalten zu werden."

Und das gilt in besonderem Masse fuer Windows NT.

> > Ich wuerde normalerweise, wenn das vom IP Design her sinnvoll
> > gehen wuerde, am liebsten jeden NT-Rechner in ein isoliertes
> > IP-Segment stellen. Dann kann er wenigstens niemand anderem
> > Schaden zufuegen. 
> 
> Und dann verwendest du Wins ohne Broadcast-Backup? Wo ist da der
> Stabilitaetsvorteil?

Der Stabilitaetsvorteil ist ganz einfach. Es ist mir scheissegal,
dass die Leute im zweiten Stock nicht arbeiten koennen, wenn sie
wenigstens mit ihrem Dreck den ersten Stock in Ruhe lassen.

Heil kriegen tue ich das Zeugs eh nicht.

Wenn Du in einem Kilometer Entfernung jemanden siehst, der akut
vom Ebola-Virus befallen ist, dann liegt der Gesundheitsvorteil,
so grauenvoll hart das jetzt klingt, nicht darin, fuer den armen Menschen
einen Arzt zu rufen. Der Ebola-Patient verreckt eh, da kann niemand
mehr was machen. Der Gesundheitsvorteil liegt darin, Fersengeld
zu geben und im Umfeld von 10 Kilometern um den Patienten am besten
jede lebende Zelle zu vernichten, den Boden 2 Meter tief abzutragen
und die Gegend from scratch neu aufzubauen.

Windows ist nicht stabil zu kriegen. Da geht es nicht um 
Stabilitaetsgewinn, da geht es fuer mich um pure Schadensbegrenzung.

Detlef

--
Detlef Bosau                                    [EMAIL PROTECTED]

Bienroder Weg 79                                Tel.: +49 531 303383
                                                D2:   +49 172 6819937
38106 Braunschweig, Germany                     Fax:  +49 531 303364
         >>>> PGP Public Key als Empfangsbestaetigung <<<<
## CrossPoint v3.1 R ##

------------------------------

From: "Anders Gulden Olstad" <[EMAIL PROTECTED]>
Subject: Re: Sendmail configuration
Crossposted-To: uk.comp.os.linux
Date: Sun, 06 Jun 1999 13:46:06 GMT

FreeLorn <[EMAIL PROTECTED]> wrote:
> I'm not sure if it is a problem at my end or at the other end, but
> occasionally when I send an email to someone, I get a bounce reply of
> 551 <[EMAIL PROTECTED]> ...we do not relay.

That sounds like a problem at your ISP side. Strange that you mention
"occasionally", though...

> # "Smart" relay host (may be null)
> DSpost.demon.co.uk

Looks OK.

> # who I masquerade as (null for no masquerading) (see also $=M)
> DMarlen.demon.co.uk

I found out in order to to get sendmail masquerading decently, you have
to add a "Dj" entry after the "DM".

# who I masquerade as (null for no masquerading) (see also $=M)
DMarlene.demon.co.uk
Djarlene.demon.co.uk

If this doesn't work - you should contact your ISP.
-- 
Anders Gulden Olstad @ Brinkley | * * * * * * * * * * * * * * * * * * * * 
RedHat 5.2 Linux kernel 2.0.36  | "Penguins are generally nice creatures"

------------------------------

From: "Mygorg" <[EMAIL PROTECTED]>
Crossposted-To: 
comp.os.ms-windows.networking.misc,comp.os.ms-windows.networking.tcp-ip,comp.os.ms-windows.networking.win95,comp.os.ms-windows.networking.windows,comp.os.ms-windows.nt.admin.networking,comp.os.ms-windows.programmer.networks
Subject: TCP/IP checksum formula
Date: Sun, 6 Jun 1999 15:05:45 +0200

Hi all

I'd like to faind any info on TCP/IP checksum formula (TCP chksm and IP
chksm).
If someone know anything about this formula (or how checksum is precisely
calculated).
THX in advance.



------------------------------


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