PPP MTU please help very urgent
Rama Chandrasekaran
rama03 at sbcglobal.net
Wed Apr 14 14:31:51 UTC 2004
We are running some file transfer experiments using
FTP/TCP/IP/PPP between two Linux PCs (running Red-Hat
Linux 7.3 with kernel 2.4.18-3). We are trying to
change the PPP MTU size (using "ifconfig ppp0 mtu
xxx"). The situation is described below:
(1) When we change the MTU to a size which is smaller
than the default size 1500 bytes, it works using the
new size, which can be observed from SYN, SYN-ACK
exchange and TSG plots.
(2) When we change the MTU to a size larger than the
default 1500 bytes (such as 4352 bytes), the protocol
still sends data using the default size of 1500
instead of the updated larger size.
I think the problem is that segments/packets delivered
to PPP are limited to less than or equal to 1500
bytes. So even though we enlarged PPP MTU, the PDU
delivered to PPP by TCP/IP is not larger than 1500
bytes.
Could anyone advise us how we can adjust the size of
TCP/IP segments larger than the default size of 1500
bytes so that the transmitted PPP frame size is
larger?
Any help will be greatly appreciated.
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Today's Topics:
1. RE: RH 9 dual boot problem (Matthew Saltzman)
2. RE: RH 9 dual boot problem (Rodolfo J. Paiz)
3. RE: Dual boot and grub (Thomas Fortner)
4. RE: anti virus and firewall for linxu (Rich Lichvar)
5. RE: anti virus and firewall for linxu (Tobias Speckbacher)
6. 3Com U.S. Robotics 56k Message Modem (External) - Newbie
question (J Simpson V21)
7. Re: 3Com U.S. Robotics 56k Message Modem (External) - Newbie
question (Chris Wilson)
8. Re: package installation issue. (Jeff)
9. Re: package installation issue. (Edward)
10. RE: USB (ameet p)
11. LDAP Security (Ryan Golhar)
12. RH9 FTP Installation. (Rajesh Prakasan)
13. Re: RH9 FTP Installation. (Jim Hayward)
14. RE: redhat-list Digest, Vol 2, Issue 23 (Lawrence Cheong)
15. disc space (Kalin Mintchev)
16. Re: disc space (Edward)
17. Re: disc space (Kalin Mintchev)
18. Upgrading from PII to Athlon...glibc issue(s)? (Mike Burger)
19. grep file (Steve Buehler)
20. rc.local question (Manuel Arostegui Ramirez)
21. Re: grep file (Greg Bradner)
22. Re: grep file (Steve Buehler)
23. Re: grep file (MKlinke)
24. DNS Error (Hernan Dario Arredondo)
25. RedHat slow boot (Dinh Tien Tuan Anh)
26. Re: DNS Error (James Marcinek)
27. Re: RedHat slow boot (Ed Wilts)
28. Re: RedHat slow boot (Dinh Tien Tuan Anh)
29. Re: DNS Error (Hernan Dario Arredondo)
----------------------------------------------------------------------
Message: 1
Date: Tue, 13 Apr 2004 12:16:03 -0400 (EDT)
From: Matthew Saltzman
Subject: RE: RH 9 dual boot problem
To: General Red Hat Linux discussion list
Message-ID:
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Tue, 13 Apr 2004, Mathur, Sachin (UMKC-Student) wrote:
> boot from thelinux cd and try to upgrade any kernel package. You should
> find an option to fiddle with the boot loader for it to give you an
> option for the dual boot.
Or try grub-install(8).
Or read the info files for grub. It's not too hard to get grub
reinstalled to your satisfaction, but I don't have a step-by-step
procedure handy.
BTW, on my dual-boot machines, I tend to like to install grub in the boot
record for the /boot partition and set /boot active with fdisk. That
avoids the problem of having Windows overwriting it every reinstall.
After reinstalling Windows, one just needs to run fdisk and set /boot
active again to have grub work.
>
>
> Sachin
>
> ________________________________
>
> From: Billy Davis [mailto:bdavis at cds-corp.com]
> Sent: Mon 4/12/2004 11:36 AM
> To: redhat-list at redhat.com
> Subject: RH 9 dual boot problem
>
>
>
> I am trying to set up a dual boot RH 9 workstation. I made the
> mistake of loading RH 9 first, and then loading Windows XP.
> Now, Windows ALWAYS boots, and I can only get RH to
> run by booting from a floppy. When I installed RH, I set GRUB
> up to allow either Windows or RH to be selected, but Windows
> must have overwritten the MBR. Is there an easy way to restore
> the RH boot record back into the MBR, other than reloading
> RH again??
>
> Thanks
> BDavis
>
>
>
>
>
>
--
Matthew Saltzman
Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs
------------------------------
Message: 2
Date: Tue, 13 Apr 2004 10:19:26 -0600
From: "Rodolfo J. Paiz"
Subject: RE: RH 9 dual boot problem
To: General Red Hat Linux discussion list
Message-ID: <6.0.3.0.0.20040413101504.0253e080 at mail.simpaticus.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 09:49 4/13/2004, you wrote:
>boot from thelinux cd and try to upgrade any kernel package. You should
>find an option to fiddle with the boot loader for it to give you an option
>for the dual boot.
Huh? No!
Please post responses AT THE BOTTOM of a post. If you post an answer above
a question, people have to read bottom-to-top which is a pain in the ass.
Also, please avoid giving answers which are definitively wrong.
>________________________________
>From: Billy Davis [mailto:bdavis at cds-corp.com]
>Sent: Mon 4/12/2004 11:36 AM
>To: redhat-list at redhat.com
>Subject: RH 9 dual boot problem
>
>I am trying to set up a dual boot RH 9 workstation. I made the
>mistake of loading RH 9 first, and then loading Windows XP.
>Now, Windows ALWAYS boots, and I can only get RH to
>run by booting from a floppy. When I installed RH, I set GRUB
>up to allow either Windows or RH to be selected, but Windows
>must have overwritten the MBR. Is there an easy way to restore
>the RH boot record back into the MBR, other than reloading
>RH again??
You are correct, Windows overwrites the MBR without asking. Sorry I do not
have the time right now to provide a detailed answer, but at least a
general guide:
1. Boot from the Red Hat Linux CD's with "linux rescue" at the
boot prompt. Once the rescue disk functionality boots up, you will be able
to access your normal Linux partitions by mounting them (I believe you can
find them in /mnt/sysimage).
2. Mount the /boot partition, or the / partition if you do not
have one.
3. Run "grub-install /dev/hda" (assuming hda is the right drive,
of course).
Done.
Please search the Red Hat site or Google for better, more detailed
instructions than this... I am in a hurry and there may be something wrong
there. Search for "reinstall grub" or something like that. But it *is* an
easy process, with no tweaking or kernel hacking necessary.
Cheers,
--
Rodolfo J. Paiz
rpaiz at simpaticus.com
http://www.simpaticus.com
------------------------------
Message: 3
Date: Tue, 13 Apr 2004 13:18:09 -0500
From: Thomas Fortner
Subject: RE: Dual boot and grub
To: Red Hat Support List
Message-ID: <1081880289.2211.5.camel at ministry1.prodigal.local>
Content-Type: text/plain; charset="us-ascii"
boot from thelinux cd and try to upgrade any kernel package. You should
find an option to fiddle with the boot loader for it to give you an
option for the dual boot.
Sachin
________________________________
From: Billy Davis [mailto:bdavis at cds-corp.com]
Sent: Mon 4/12/2004 11:36 AM
To: redhat-list at redhat.com
Subject: RH 9 dual boot problem
I am trying to set up a dual boot RH 9 workstation. I made the
mistake of loading RH 9 first, and then loading Windows XP.
Now, Windows ALWAYS boots, and I can only get RH to
run by booting from a floppy. When I installed RH, I set GRUB
up to allow either Windows or RH to be selected, but Windows
must have overwritten the MBR. Is there an easy way to restore
the RH boot record back into the MBR, other than reloading
RH again??
Thanks
BDavis
Actually, it is easier than all that. Take a look at the man page on
grub-install. This replaces the Windows boot track with the grub boot
track. grub will then read the /boot/grub.conf file to find all its
pieces.
Tom
Thomas S. Fortner
Burleson, Texas
thomas.fortner at sbcglobal.net
"but we preach Christ crucified..." 1 Corinthians 1:23
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Message: 4
Date: Tue, 13 Apr 2004 15:11:02 -0400
From: "Rich Lichvar"
Subject: RE: anti virus and firewall for linxu
To: "'General Red Hat Linux discussion list'"
Message-ID: <000d01c4218b$10844090$9611b8ce at monet>
Content-Type: text/plain; charset="us-ascii"
Don't know about antivirus, but I hear raves for Smoothwall. Only,
unless you purchase the commercial product, forget about using it on
SCSI drives. (The Open Source runs only on IDE/ATA drives. Take it from
personal experience.)
RichLich
-----Original Message-----
From: Muhammad Rizwan Khan [mailto:rizwan at nixpanel.com]
Sent: Monday, April 12, 2004 5:38 AM
To: redhat-list at redhat.com
Subject: anti virus and firewall for linxu
Hello
Can any body plz. tell me what is the best anti virus and firewall
available
for linxu.
--
Muhammad Rizwan Khan
------------------------------
Message: 5
Date: Tue, 13 Apr 2004 13:01:09 -0700
From: "Tobias Speckbacher"
Subject: RE: anti virus and firewall for linxu
To: "General Red Hat Linux discussion list"
Message-ID:
Content-Type: text/plain; charset="us-ascii"
I use http://www.clamav.net/ on my mail gateway, works pretty well.
-T
-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Rich Lichvar
Sent: Tuesday, April 13, 2004 11:11 AM
To: 'General Red Hat Linux discussion list'
Subject: RE: anti virus and firewall for linxu
Don't know about antivirus, but I hear raves for Smoothwall. Only,
unless you purchase the commercial product, forget about using it on
SCSI drives. (The Open Source runs only on IDE/ATA drives. Take it from
personal experience.)
RichLich
-----Original Message-----
From: Muhammad Rizwan Khan [mailto:rizwan at nixpanel.com]
Sent: Monday, April 12, 2004 5:38 AM
To: redhat-list at redhat.com
Subject: anti virus and firewall for linxu
Hello
Can any body plz. tell me what is the best anti virus and firewall
available
for linxu.
--
Muhammad Rizwan Khan
--
redhat-list mailing list
unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list
------------------------------
Message: 6
Date: Tue, 13 Apr 2004 23:04:18 +0100
From: "J Simpson V21"
Subject: 3Com U.S. Robotics 56k Message Modem (External) - Newbie
question
To: "Redhat-List"
Message-ID:
Content-Type: text/plain; charset="iso-8859-1"
Hi
I recently purchased the above external modem as my internal modem was
apparently a softmodem and I didn't have the skill to make it work with
RedHat 9.
I have used the Internet Configuration Wizard to set up the modem, when I
click on "activate" it says "failed to activate ppp0 with error 8. But I
see light flashing on the modem.
I have also set up kppp and when I click on connect it says "modem ready" (I
see lights flashing on the modem), then it says "initalising modem" and
seems to get stuck. The TR light on the modem remains on then.
TR in the book says 'ON if modem receives a DTR signal from computer.
Always on (modem ignores DTR) if the DTR override is ON (&DO)' I'm not sure
what that means. I purchased the modem second user, so I'm wondering if it
is a problem with the modem.
I don't believe it is the serial port as I have 2, one which is being used
by my mouse. I have tried swapping them over and the mouse still works.
Any help gratefully received. Further specific questions are:
1. Where do I find out what the error codes mean?
2. Did I buy the wrong type of external modem?
Regards
Janet
------------------------------
Message: 7
Date: 13 Apr 2004 17:41:03 -0500
From: Chris Wilson
Subject: Re: 3Com U.S. Robotics 56k Message Modem (External) - Newbie
question
To: General Red Hat Linux discussion list
Message-ID: <1081896063.26580.8.camel at cwilson>
Content-Type: text/plain
I am not sure what the ppp0 error 8 is. And tt has been several years
since I used a modem but the switches should be set to 1,3,5 down and
the rest up. (1) DTR flow control, (3) Display Result Codes, (4) Auto
Answer (also can be overriden with ATS0= or 0 for off.
I would try to talk to the modem directly through "minicom -s". You will
need to tell it which port you are on.
Once minicom is running try typing the following: "AT&F1E1&W". That
should set the mode to factory default and store it in it's first NVRAM
location. You should get an "OK" back. If you don't get an OK try to
type "AT" and see if you get an OK. You should also see the "TR" and
"RD" lights flash. If any of this does not happen there maybe a physical
problem.
If you get an OK then the problem is probably in your PPP setup.
-- Chris
On Tue, 2004-04-13 at 17:04, J Simpson V21 wrote:
> Hi
>
> I recently purchased the above external modem as my internal modem was
> apparently a softmodem and I didn't have the skill to make it work with
> RedHat 9.
>
> I have used the Internet Configuration Wizard to set up the modem, when I
> click on "activate" it says "failed to activate ppp0 with error 8. But I
> see light flashing on the modem.
>
> I have also set up kppp and when I click on connect it says "modem ready" (I
> see lights flashing on the modem), then it says "initalising modem" and
> seems to get stuck. The TR light on the modem remains on then.
>
> TR in the book says 'ON if modem receives a DTR signal from computer.
> Always on (modem ignores DTR) if the DTR override is ON (&DO)' I'm not sure
> what that means. I purchased the modem second user, so I'm wondering if it
> is a problem with the modem.
>
> I don't believe it is the serial port as I have 2, one which is being used
> by my mouse. I have tried swapping them over and the mouse still works.
>
> Any help gratefully received. Further specific questions are:
>
> 1. Where do I find out what the error codes mean?
>
> 2. Did I buy the wrong type of external modem?
>
> Regards
>
> Janet
>
>
>
------------------------------
Message: 8
Date: Wed, 14 Apr 2004 01:20:50 +0100
From: Jeff
Subject: Re: package installation issue.
To: General Red Hat Linux discussion list
Message-ID: <200441412050.550111 at beast>
Content-Type: text/plain; charset="us-ascii"
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------------------------------
Message: 9
Date: Wed, 14 Apr 2004 09:19:38 +0800
From: Edward
Subject: Re: package installation issue.
To: jeff at virgin.net, General Red Hat Linux discussion list
Message-ID: <407C91AA.2040303 at tripled.iinet.net.au>
Content-Type: text/plain; charset=us-ascii; format=flowed
Jeff wrote:
> On Tue, 13 Apr 2004 08:09:31 -0400, Marvin Blackburn wrote:
>> I keep running into this issue.
>>
>>
>> I try to load a package, say packageX. When I try to install, it
>> says that i need fileY to resolve
>> some dependency. How can I find the package that might contain
>> that fileY, so I can install packageX.
>>
>> If a previous version of the file is on the system, you can often
>> see what package it was associated with. But if the file is not
>> there, what do you do.
>>
>> Any help would be appreciated.
>> ------------------
>> Marvin Blackburn
>> Systems Administrator
>> Glen Raven
>> "He's no failure. He's not dead yet" --William Lloyd George
>
> just to add to everyone else's replies on this about rpmfind.net, I have
> found it MUCH easier to use apt to solve rpm dependencies - especially
> when i first started with linux. The biggest pain i came across when
> installing rpms were the dependencies - say i wanted to install packageX
> and it might need packages A, B & C, but in-turn those packages may also
> need other rpms so before you know it you need to find tons of packages
> to solve all the deps.
>
>
>
> have a look at http://apt.freshrpms.net/ -- its well worth the download.
>
>
>
> HTH
>
And just to add to that, up2date will solve dependencies as well.
Regards,
Ed.
------------------------------
Message: 10
Date: Wed, 14 Apr 2004 11:24:37 +1000 (EST)
From: ameet p
Subject: RE: USB
To: General Red Hat Linux discussion list
Message-ID: <20040414012437.59176.qmail at web25009.mail.ukl.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
hey fellas for all those who are haviung trouble with
usb memory sticks this manual should solve your probs:
http://www.envoydata.com/support/install/kiosk/LinuxHowTo.pdf
--- Redhat Enterprise wrote: >
Hi Manuel,
>
> What is cdrecord-scanbus?
>
>
> --- Manuel Arostegui Ramirez
> wrote:
> > You must have usb-mass storage activate on your
> > kernel.
> > Can you see your memory stick on /proc/bus/usb?
> > And cdrecord -scanbus?
> >
> > Ryan Golhar wrote:
> > Memory Sticks are detected as SCSI hard disks. So,
> > to mount the memory
> > stick, use /dev/sda1 or /dev/sdb1
> >
> > I don't know exactly what usb-uchi is for, but I
> > believe it has
> > something to do with recognizing usb devices
> >
> > Ryan
> >
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com
> > [mailto:redhat-list-bounces at redhat.com] On Behalf
> Of
> > Redhat Enterprise
> > Sent: Sunday, April 11, 2004 11:08 PM
> > To: redhat-list at redhat.com; taroon
> > Subject: USB
> >
> >
> > Hi all,
> >
> > I don't know how to get a USB memory stick to work
> > on
> > RHEL 2.1 and RH 9.0. Where could i be able to get
> > some
> > help on these. Also what are these USB controllers
> > usb-uchi etc. Please explain.
> >
> > Thanks for your time.
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Tax Center - File online by April 15th
> > http://taxes.yahoo.com/filing.html
> >
> >
> > --
> > redhat-list mailing list
> > unsubscribe
> >
>
mailto:redhat-list-request at redhat.com?subject=unsubscribe
> >
> https://www.redhat.com/mailman/listinfo/redhat-list
> >
> >
> > --
> > redhat-list mailing list
> > unsubscribe
> >
>
mailto:redhat-list-request at redhat.com?subject=unsubscribe
> >
> https://www.redhat.com/mailman/listinfo/redhat-list
> >
> > --
> >
> > Manuel Aróstegui Linux user 200896
> > http://manuel.todo-linux.com
> >
> > ---------------------------------
> >
> > Antivirus • Filtros antispam • 6 MB gratis
> > ¿Todavía no tienes un correo inteligente?> --
> > redhat-list mailing list
> > unsubscribe
> >
>
mailto:redhat-list-request at redhat.com?subject=unsubscribe
> >
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> >
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Tax Center - File online by April 15th
> http://taxes.yahoo.com/filing.html
>
>
> --
> redhat-list mailing list
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>
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Find local movie times and trailers on Yahoo! Movies.
http://au.movies.yahoo.com
------------------------------
Message: 11
Date: Tue, 13 Apr 2004 22:08:23 -0400
From: "Ryan Golhar"
Subject: LDAP Security
To:
Message-ID: <00f001c421c5$5e31c350$4000a8c0 at GOLHARMOBILE1>
Content-Type: text/plain; charset="us-ascii"
Does anyone have any experience with LDAP? I have an LDAP server setup
to authenticate users. I want to allow certain users the ability to add
other users and change passwords. I don't want them to be able to
delete users. Right now, my slapd.conf file contains the following
ACLs:
#
# ACLs
#
access to dn=".*,ou=People,o=v12,o=UMDNJ,c=US"
attr=userPassword
by self write
by dn="uid=root,ou=People,o=v12,o=UMDNJ,c=US" write
by * auth
# allows admins to add users to "users" group
access to dn="cn=users,ou=Group,o=v12,o=UMDNJ,c=US"
attr=memberUid
by self write
by dn="uid=root,ou=People,o=v12,o=UMDNJ,c=US" write
by dn="uid=golharam,ou=People,o=v12,o=UMDNJ,c=US" write
by dn="uid=kerrigje,ou=People,o=v12,o=UMDNJ,c=US" write
by dn="uid=kholodvl,ou=People,o=v12,o=UMDNJ,c=US" write
by dn="uid=byrne,ou=People,o=v12,o=UMDNJ,c=US" write
by * read
# allows admins to add users
access to dn="ou=People,o=v12,o=UMDNJ,c=US"
by self write
by dn="uid=root,ou=People,o=v12,o=UMDNJ,c=US" write
by dn="uid=golharam,ou=People,o=v12,o=UMDNJ,c=US" write
=== message truncated ===
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