Linux-Networking Digest #351, Volume #11 Mon, 31 May 99 16:13:44 EDT
Contents:
IPCHAINS ("Ken")
Great trouble with recent PCMCIA kit, how to fix it ? (Eric LEMAITRE)
Need help with IP Masquerading and UDP packets (Luiz Otavio L. Zorzella)
Re: What are drawbacks to using an ISA NIC? ("Steve Snyder")
Simultaneous network/IDE traffic = reboot (Roland Olsson)
Re: A question about collisions (Pat Crean)
----------------------------------------------------------------------------
From: "Ken" <[EMAIL PROTECTED]>
Subject: IPCHAINS
Date: Mon, 31 May 1999 07:10:14 -0800
I am running RedHat 6.0 and have ipchains working but I can not get ipchains
to allow NetMeeting inbound, outbound works fine. Does anyone have a
successful set of rules for ipchains/NetMeeting? I have been to several how
to's and have tried several configs but still no luck.
Please Help if you have the answer
Ken
------------------------------
From: Eric LEMAITRE <[EMAIL PROTECTED]>
Subject: Great trouble with recent PCMCIA kit, how to fix it ?
Date: Mon, 31 May 1999 20:31:04 +0200
Hi everybody !
I recently installed new Red-Hat 5.2 + 2.2.3 Kernel, and all worked perfectly,
untill I tried to install PCMCIA-3.0.9 or more package, which shows a nice
client (cardinfo) showing occupation of your PCMCIA ports : Either executables
only copy into /usr/bin PATH doesn't recognize a proper modules version, or the
whole package installation messes up the network scripts and all network is
fouled up.
So, is there a way to install this stuff safely (RPM or something) ?
Bye !
------------------------------
Subject: Need help with IP Masquerading and UDP packets
From: [EMAIL PROTECTED] (Luiz Otavio L. Zorzella)
Date: 31 May 1999 11:56:37 -0700
Hi,
I have a Win 95 inside a private LAN (ppp) that I set up with ip
masquerading.
To start, I had only one very simple rule:
ipfwadm -F -a m -S 192.168.10.0/24 -D 0.0.0.0/0
Everything works fine: www, ftp, etc. Then I installed net2phone
(http://www.net2phone.com), and I'm trying to make it work.
While seting up, net2phone makes a "Test for firewall", and fails in
this test. I set up 2 specific rules for net2phone, then:
ipfwadm -F -a m -b -P udp -S 192.168.10.51 10000 -D 0.0.0.0/0 10000
ipfwadm -F -a m -b -P tcp -S 192.168.10.51 10000 -D 0.0.0.0/0 10000
ipfwadm -F -a m -b -P icmp -S 192.168.10.51 10000
and I configured net2phone to use the 10000 port number (it can be
configured to anything you want, according to their website). The
test still fails.
I tcpdumped both by eth0 (private LAN) and ppp0 (internet) while
doing the test, and I think the problem comes in this line from my
ppp0, though I don't know exactly what to do:
12:45:31.461066 169.132.184.211.46869 > w.x.y.z.6613: udp 55 (DF)
12:45:31.461066 w.x.y.z > 169.132.184.211: icmp: w.x.y.z udp port 6613 unreachable
[tos 0xc0]
Any help is appreciated. Please note that I made a "global replace"
of my firewall IP address by w.x.y.z in the dumps, and a replace of
my internal machine by internal.mydomain.com. Forgive my paranoia...
:^>
Follows the traffic generated in the test, as seen by tcpdump in both
interfaces:
********
(eth0)
12:34:40.441066 0:0:86:16:ff:3 null > 0:20:18:38:18:54 sap 45 I (s=0,r=20,C) len=42
8404 0000 1f11 100f ce84 d6d5 a984 b8d3 ef90 1a91 0014 1e01 5e68 656c 6c6f 5f71 2031
200a 0000 0000 0000
12:34:40.441066 0:0:86:16:ff:3 null > 0:20:18:38:18:54 sap 45 I (s=0,r=20,C) len=42
8504 0000 1f11 86dd ce84 d6d5 a984 4105 ef91 1a91 0014 95cd 5e68 656c 6c6f 5f71 2032
200a 0000 0000 0000
12:34:40.751066 169.132.184.211.6801 > internal.mydomain.com.10000: udp 12 (DF)
12:34:40.751066 0:0:86:16:ff:3 null > 0:20:18:38:18:54 sap 45 I (s=0,r=91,P) len=178
8604 0000 1f11 0d81 ce84 d6d5 a984 b8d3 ef90 1a91 00a2 861a 5e67 6574 6261 6c5f 6571
2030 2030 2e30 2e30 2e30 2031 3030 3030
12:34:40.761066 ap2.labs.idt.net.6801 > internal.mydomain.com.10000: udp 12 (DF)
12:34:43.201066 0:0:86:16:5:6d > Broadcast sap e0 ui/C len=43 ffff 0022 0011 0000 0000
ffff ffff ffff 0452 0000 0000 0000 8616 056d 4008 0001 0004 0000 0000 0000 0000 00
*********
(ppp0)
12:45:12.201066 w.x.y.z.61330 > 169.132.184.211.6801: udp 12
12:45:12.201066 w.x.y.z.61331 > ap2.labs.idt.net.6801: udp 12
12:45:12.571066 169.132.184.211.6801 > internal.mydomain.com.10000: udp 12 (DF)
12:45:12.571066 w.x.y.z.61330 > 169.132.184.211.6801: udp 154 12:45:12.581066
ap2.labs.idt.net.6801 > internal.mydomain.com.10000: udp 12 (DF)
12:45:13.021066 169.132.184.211.62000 > w.x.y.z.10000: S 1448725872:1448725872(0) win
8760 <mss 1460> (DF)
12:45:13.021066 w.x.y.z.10000 > 169.132.184.211.62000: R 0:0(0) ack 1448725873 win 0
12:45:13.341066 169.132.184.211.62003 > w.x.y.z.10000: S 1449001890:1449001890(0) win
8760 <mss 1460> (DF)
12:45:13.341066 w.x.y.z.10000 > 169.132.184.211.62003: R 0:0(0) ack 1449001891 win 0
12:45:13.351066 169.132.184.211.62003 > w.x.y.z.10000: R 1449001891:1449001891(0) win
8760 (DF)
12:45:16.391066 169.132.184.211.46869 > w.x.y.z.6613: udp 55 (DF)
12:45:16.391066 w.x.y.z > 169.132.184.211: icmp: w.x.y.z udp port 6613 unreachable
[tos 0xc0]
12:45:21.371066 169.132.184.211.46869 > w.x.y.z.6613: udp 55 (DF)
12:45:21.371066 w.x.y.z > 169.132.184.211: icmp: w.x.y.z udp port 6613 unreachable
[tos 0xc0]
12:45:26.351066 169.132.184.211.46869 > w.x.y.z.6613: udp 55 (DF)
12:45:26.351066 w.x.y.z > 169.132.184.211: icmp: w.x.y.z udp port 6613 unreachable
[tos 0xc0]
12:45:31.461066 169.132.184.211.46869 > w.x.y.z.6613: udp 55 (DF)
12:45:31.461066 w.x.y.z > 169.132.184.211: icmp: w.x.y.z udp port 6613 unreachable
[tos 0xc0]
--
Luiz Otavio L. Zorzella Computer Engineer
[EMAIL PROTECTED]
------------------------------
Crossposted-To: comp.os.linux.hardware
From: "Steve Snyder" <[EMAIL PROTECTED]>
Reply-To: "Steve Snyder" <[EMAIL PROTECTED]>
Subject: Re: What are drawbacks to using an ISA NIC?
Date: Mon, 31 May 1999 15:40:46 GMT
1. I mis-wrote the expected top speed. The cable modem moves a maximum of
3 megabits, not 3 megabytes, per second. That should be well within the
capabilities of the ISA bus. Sorry for the confusion.
2. That PCI slot is definitely defective. Using a PCI NIC in that slot,
packets can be sent but not received. I tried 2 different NICs in that
slot and examined all the IRQs in the system before deciding the slot was
bad.
Thanks for the response.
On Sun, 30 May 1999 21:47:58 -0700, Tim Moore wrote:
>ISA is clocked at 8.3MHz, PCI at 33MHz. ISA has more CPU overhead too.
>
>This card is 10bT if I recall correctly, so it won't move more than
>about 850KB/s. If you want 3MB/s you'll have to go 100bT which means
>PCI.
>
>Are you sure the slot is defective? My PCI slots 4&5 share an IRQ which
>could cause weird behavior under some circumstances. Other boards that
>have built-in SCSI, sound, etc are known to share IRQ's with particular
>PCI slots.
>
>Steve Snyder wrote:
>>
>> I discovered (by trying to use it) that the last unused PCI slot in my
>> system is defective. This forced me to add an ISA NIC (a 3Com 3C509B)
>> instead of the PCI device I had planned on.
>>
>> The ISA NIC is working well. I wonder, though, what the drawbacks are
>> compared to a PCI NIC. This device is just attached to a cable modem,
>> which suggests that it will never be called upon to move more than
>> 3MB/second anyway.
>>
>> Is interrupt latency higher with an ISA NIC? Increased CPU use? The
>> initial install involves more work because you have to specify the IRQ and
>> I/O port address range. Now that the installation is done, though, I'm
>> interested in runtime gotchas.
>>
>> Thank you.
>>
>> ***** Steve Snyder *****
>
>--
>direct replies substitute timothymoore for user name
>
>"Everything is permitted. Nothing is forbidden."
> WS Burroughs.
***** Steve Snyder *****
------------------------------
Date: Mon, 31 May 1999 21:12:25 +0200
From: Roland Olsson <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.hardware
Subject: Simultaneous network/IDE traffic = reboot
This is a multi-part message in MIME format.
==============0B567FA2BC1A6CBE88523E35
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Hi,
I have stumbled upon a _big_ problem with my machine. It makes a silent
and instantaneous soft reboot when performing (pretty tough) disk and
network access at the same time. I noticed this when trying to transfer
some 10+ Mb files from this machine as the screen just turned black and
the BIOS "welcome" screen appeared. No kernel oops or other message,
just a plain reboot. I can't find anything in the logs either. *sigh*
If I am using the machine "normally" everything works just fine. That is
no fiddling with large files or performing any extreme network activity.
I have found a very simple way of reproducing the crash. Just do a 'ping
-f' to the machine for a second or so and run 'hdparm -t /dev/hda' at
the same time. It reboots almost immediately. One more thing, if I do
'ping -f' locally no matter to what address/if, I can't make it crash.
But from another machine - reboot.
I have checked everything I can think of, i.e. conflicting IRQ:s, DMA
etc. I have tried to reassign almost everything in the BIOS but to no
avail. Also tested the 2.2.9 kernel but same thing there. I do not know
what to do next, does anyone of you have an idea?
Some facts about the machine:
Intel Celeron 333
128Mb DIMM
Motherboard Abit BH6 (Award BIOS rev 4.51PG)
2pcs NIC 3Com 3C905B-TX
Seagate Medalist ST38420A IDE 8,6Gb
Redhat 6.0 (kernel build 2.2.5-15)
Attached are some files from /proc that may or may not help you to help
me.
Regards,
/Roland
==============0B567FA2BC1A6CBE88523E35
Content-Type: text/plain; charset=us-ascii;
name="boot-allinfo"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="boot-allinfo"
::::::::::::::
cpuinfo
::::::::::::::
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 6
model name : Celeron (Mendocino)
stepping : 0
cpu MHz : 334.098612
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36
mmx osfxsr
bogomips : 333.41
::::::::::::::
devices
::::::::::::::
Character devices:
1 mem
2 pty
3 ttyp
4 ttyS
5 cua
7 vcs
10 misc
29 fb
36 netlink
128 ptm
136 pts
Block devices:
1 ramdisk
3 ide0
9 md
::::::::::::::
dma
::::::::::::::
4: cascade
::::::::::::::
dmesg
::::::::::::::
Linux version 2.2.5-15 ([EMAIL PROTECTED]) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #1 Mon Apr 19 23:00:46 EDT 1999
Detected 334098612 Hz processor.
Console: colour dummy device 80x25
Calibrating delay loop... 333.41 BogoMIPS
Memory: 63140k/65536k available (996k kernel code, 412k reserved, 928k data, 60k init)
VFS: Diskquotas version dquot_6.4.0 initialized
CPU: Intel Celeron (Mendocino) stepping 00
Checking 386/387 coupling... OK, FPU using exception 16 error reporting.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.26 (19981001) Richard Gooch ([EMAIL PROTECTED])
PCI: PCI BIOS revision 2.10 entry at 0xfb460
PCI: Using configuration type 1
PCI: Probing PCI hardware
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
Initializing RT netlink socket
Starting kswapd v 1.5
vesafb: framebuffer at 0xe6000000, mapped to 0xc4800000, size 4096k
vesafb: mode is 1024x768x32, linelength=4096, pages=0
vesafb: protected mode interface info at c000:7ee0
vesafb: scrolling: redraw
vesafb: directcolor: size=8:8:8:8, shift=24:16:8:0
Console: switching to colour frame buffer device 128x48
fb0: VESA VGA frame buffer device
Detected PS/2 Mouse Port.
Serial driver version 4.27 with MANY_PORTS MULTIPORT SHARE_IRQ enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
pty: 256 Unix98 ptys configured
apm: BIOS version 1.2 Flags 0x07 (Driver version 1.9)
Real Time Clock Driver v1.09
RAM disk driver initialized: 16 RAM disks of 4096K size
PIIX4: IDE controller on PCI bus 00 dev 39
PIIX4: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA
hda: ST38420A, ATA DISK drive
hdb: Pioneer CD-ROM ATAPI Model DR-A12X 0100, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: ST38420A, 8223MB w/512kB Cache, CHS=1048/255/63
hdb: ATAPI 12X CD-ROM drive, 128kB Cache
Uniform CDROM driver Revision: 2.54
floppy0: no floppy controllers found
md driver 0.90.0 MAX_MD_DEVS=256, MAX_REAL=12
raid5: measuring checksumming speed
raid5: using high-speed MMX checksum routine
pII_mmx : 813.054 MB/sec
p5_mmx : 787.908 MB/sec
8regs : 576.072 MB/sec
32regs : 413.766 MB/sec
using fastest function: pII_mmx (813.054 MB/sec)
scsi : 0 hosts.
scsi : detected total.
md.c: sizeof(mdp_super_t) = 4096
Partition check:
hda: hda1 hda2 < hda5 hda6 hda7 hda8 hda9 >
autodetecting RAID arrays
autorun ...
... autorun DONE.
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 60k freed
Adding Swap: 72256k swap-space (priority -1)
3c59x.c:v0.99H 11/17/98 Donald Becker
http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
eth0: 3Com 3c905B Cyclone 100baseTx at 0xe400, 00:50:04:35:47:48, IRQ 10
Internal config register is 1800000, transceivers 0xa.
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 786d.
MII transceiver found at address 0, status 786d.
Enabling bus-master transmits and whole-frame receives.
eth1: 3Com 3c905B Cyclone 100baseTx at 0xe800, 00:50:04:35:44:e8, IRQ 11
Internal config register is 1800000, transceivers 0xa.
8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
MII transceiver found at address 24, status 786d.
MII transceiver found at address 0, status 786d.
Enabling bus-master transmits and whole-frame receives.
eth0: Initial media type Autonegotiate.
eth0: MII #24 status 786d, link partner capability 0020, setting half-duplex.
eth0: vortex_open() InternalConfig 01800000.
eth0: vortex_open() irq 10 media status 8080.
eth1: Initial media type Autonegotiate.
eth1: MII #24 status 786d, link partner capability 41e1, setting full-duplex.
eth1: vortex_open() InternalConfig 01800000.
eth1: vortex_open() irq 11 media status 8080.
eth0: Media selection timer tick happened, Autonegotiate.
eth0: MII transceiver has status 7869.
eth1: Media selection timer tick happened, Autonegotiate.
eth1: MII transceiver has status 7869.
Installing knfsd (copyright (C) 1996 [EMAIL PROTECTED]).
nfsd_init: initialized fhcache, entries=256
CSLIP: code copyright 1989 Regents of the University of California
SLIP: version 0.8.4-NET3.019-NEWTTY-MODULAR (dynamic channels, max=256) (6 bit
encapsulation enabled).
SLIP linefill/keepalive option.
cat uses obsolete /proc/pci interface
::::::::::::::
interrupts
::::::::::::::
CPU0
0: 87868 XT-PIC timer
1: 933 XT-PIC keyboard
2: 0 XT-PIC cascade
8: 2 XT-PIC rtc
10: 1598 XT-PIC eth0
11: 441 XT-PIC eth1
13: 1 XT-PIC fpu
14: 654584 XT-PIC ide0
NMI: 0
::::::::::::::
ioports
::::::::::::::
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
01f0-01f7 : ide0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
e400-e47f : eth0
e800-e87f : eth1
f000-f007 : ide0
f008-f00f : ide1
::::::::::::::
modules
::::::::::::::
slip 7636 2 (autoclean)
slhc 4392 1 (autoclean) [slip]
nfsd 151576 8 (autoclean)
lockd 31208 1 (autoclean) [nfsd]
sunrpc 52420 1 (autoclean) [nfsd lockd]
3c59x 18472 2 (autoclean)
::::::::::::::
pci
::::::::::::::
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Intel 440BX - 82443BX Host (rev 2).
Medium devsel. Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xe0000000 [0xe0000008].
Bus 0, device 1, function 0:
PCI bridge: Intel 440BX - 82443BX AGP (rev 2).
Medium devsel. Master Capable. Latency=64. Min Gnt=128.
Bus 0, device 7, function 0:
ISA bridge: Intel 82371AB PIIX4 ISA (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. No bursts.
Bus 0, device 7, function 1:
IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
I/O at 0xf000 [0xf001].
Bus 0, device 7, function 2:
USB Controller: Intel 82371AB PIIX4 USB (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
I/O at 0xe000 [0xe001].
Bus 0, device 7, function 3:
Bridge: Intel 82371AB PIIX4 ACPI (rev 2).
Medium devsel. Fast back-to-back capable.
Bus 0, device 13, function 0:
Ethernet controller: 3Com 3C905B 100bTX (rev 48).
Medium devsel. IRQ 10. Master Capable. Latency=64. Min Gnt=10.Max Lat=10.
I/O at 0xe400 [0xe401].
Non-prefetchable 32 bit memory at 0xea001000 [0xea001000].
Bus 0, device 15, function 0:
Ethernet controller: 3Com 3C905B 100bTX (rev 48).
Medium devsel. IRQ 11. Master Capable. Latency=64. Min Gnt=10.Max Lat=10.
I/O at 0xe800 [0xe801].
Non-prefetchable 32 bit memory at 0xea000000 [0xea000000].
Bus 0, device 17, function 0:
VGA compatible controller: Matrox Mystique (rev 3).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xe6000000 [0xe6000008].
Non-prefetchable 32 bit memory at 0xe7000000 [0xe7000000].
Non-prefetchable 32 bit memory at 0xe8000000 [0xe8000000].
==============0B567FA2BC1A6CBE88523E35==
------------------------------
From: Pat Crean <[EMAIL PROTECTED]>
Subject: Re: A question about collisions
Date: Mon, 31 May 1999 15:07:58 -0400
Don't worry about it --- collisions are a part of the design of ethernet ---
there was an interesting analysis a year of so ago in Sys Admin magazine that
showed that there would be almost no effect on throughput of the network, even
with over 100% collisions. You're only seeing about 1%.
Pat
On Mon, 31 May 1999, Chris Jackson wrote:
>ok, I have been living with this problem up till now thinking there
>was something wrong with my setup or maybe my connection to the
>internet wasn't so hot, but this is the problem I have....
>
>eth0 Link encap:Ethernet HWaddr 00:10:5A:15:35:C8
> inet addr:24.3.254.64 Bcast:24.3.254.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:1174178 errors:0 dropped:0 overruns:0 frame:0
> TX packets:625644 errors:0 dropped:0 overruns:0 carrier:0
> collisions:6823 txqueuelen:100
> Interrupt:11 Base address:0x6100
>
>eth1 Link encap:Ethernet HWaddr 00:20:78:15:67:20
> inet addr:192.168.1.1 Bcast:192.168.1.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:629369 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1063614 errors:0 dropped:0 overruns:0 carrier:0
> collisions:3232 txqueuelen:100
> Interrupt:9 Base address:0x6200
>
>my eth0 has an extremely large amount of collisions on it, or is this
>normal?
>I am running RedHat 6.0 and this is the network cards lines from dmesg
>
>3c59x.c:v0.99Kb 5/7/99 Donald Becker
>http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
>eth0: 3Com 3c905B Cyclone 100baseTx at 0x6100, 00:10:5a:15:35:c8,
> IRQ 11 8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate
>interface.
> MII transceiver found at address 24, status 786d.
> MII transceiver found at address 0, status 786d.
> Enabling bus-master transmits and whole-frame receives.
>ne2k-pci.c:v0.99L 2/7/98 D. Becker/P. Gortmaker
>http://cesdis.gsfc.nasa.gov/linux/drivers/ne2k-pci.html
>ne2k-pci.c: PCI NE2000 clone 'Winbond 89C940' at I/O 0x6200, IRQ 9.
>eth1: PCI NE2000 found at 0x6200, IRQ 9, 00:20:78:15:67:20.
>
>any help with this would be greatly appreciated thanks
------------------------------
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