5.1 suddenly reboots (new user)

[Federico Canton]

Hello, I just installed version 5.1 for the first time.

[FreeBSD 5.1-RELEASE (GENERIC) #0: Thu Jun  5 02:55:42 GMT 2003]

I selected regular user without x system as the installation type, and only
selected one port as part of the installation, nmap 3.27.

The problem is that every time I want use nmap to do a ping scan of my
network (nmap -sP 10.0.0.0/8 >> 10.net.txt), the computer reboots after a
few minutes.  It always reboots at he same point of the scan, after it
reaches a particular computer.

Where is the problem?

If this is not the right group to post the question, please let me know.
Thanks.

regards,

federico

PS. you can find details about my pc hardware configuration in the attached
text file.
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Oct 31 14:18:20 C061 syslogd: kernel boot file is /boot/kernel/kernel
Oct 31 14:18:20 C061 kernel: Copyright (c) 1992-2003 The FreeBSD Project.
Oct 31 14:18:20 C061 kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
Oct 31 14:18:20 C061 kernel: The Regents of the University of California. All rights reserved.
Oct 31 14:18:20 C061 kernel: FreeBSD 5.1-RELEASE #0: Thu Jun  5 02:55:42 GMT 2003
Oct 31 14:18:20 C061 kernel: root at wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC
Oct 31 14:18:20 C061 kernel: Preloaded elf kernel "/boot/kernel/kernel" at 0xc0689000.
Oct 31 14:18:20 C061 kernel: Timecounter "i8254"  frequency 1193182 Hz
Oct 31 14:18:20 C061 kernel: Timecounter "TSC"  frequency 265910884 Hz
Oct 31 14:18:20 C061 kernel: CPU: Pentium II/Pentium II Xeon/Celeron (265.91-MHz 686-class CPU)
Oct 31 14:18:20 C061 kernel: Origin = "GenuineIntel"  Id = 0x633  Stepping = 3
Oct 31 14:18:20 C061 kernel: Features=0x80f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,MMX>
Oct 31 14:18:20 C061 kernel: real memory  = 67108864 (64 MB)
Oct 31 14:18:20 C061 kernel: avail memory = 58175488 (55 MB)
Oct 31 14:18:20 C061 kernel: Pentium Pro MTRR support enabled
Oct 31 14:18:20 C061 kernel: npx0: <math processor> on motherboard
Oct 31 14:18:20 C061 kernel: npx0: INT 16 interface
Oct 31 14:18:20 C061 kernel: pcibios: BIOS version 2.10
Oct 31 14:18:20 C061 kernel: pcib0: <Host to PCI bridge> at pcibus 0 on motherboard
Oct 31 14:18:20 C061 kernel: pci0: <PCI bus> on pcib0
Oct 31 14:18:20 C061 kernel: isab0: <PCI-ISA bridge> at device 7.0 on pci0
Oct 31 14:18:20 C061 kernel: isa0: <ISA bus> on isab0
Oct 31 14:18:20 C061 kernel: atapci0: <Intel PIIX3 WDMA2 controller> port 0xffa0-0xffaf at device 7.1 on pci0
Oct 31 14:18:20 C061 kernel: ata0: at 0x1f0 irq 14 on atapci0
Oct 31 14:18:20 C061 kernel: ata1: at 0x170 irq 15 on atapci0
Oct 31 14:18:20 C061 kernel: uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xff80-0xff9f irq 9 at device 7.2 on pci0
Oct 31 14:18:20 C061 kernel: usb0: <Intel 82371SB (PIIX3) USB controller> on uhci0
Oct 31 14:18:20 C061 kernel: usb0: USB revision 1.0
Oct 31 14:18:20 C061 kernel: uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
Oct 31 14:18:20 C061 kernel: uhub0: 2 ports with 2 removable, self powered
Oct 31 14:18:20 C061 kernel: pci0: <display, VGA> at device 11.0 (no driver attached)
Oct 31 14:18:20 C061 kernel: xl0: <3Com 3c905-TX Fast Etherlink XL> port 0xff00-0xff3f irq 10 at device 17.0 on pci0
Oct 31 14:18:20 C061 kernel: xl0: Ethernet address: 00:60:97:df:6a:09
Oct 31 14:18:20 C061 kernel: miibus0: <MII bus> on xl0
Oct 31 14:18:20 C061 kernel: nsphy0: <DP83840 10/100 media interface> on miibus0
Oct 31 14:18:20 C061 kernel: nsphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
Oct 31 14:18:20 C061 kernel: orm0: <Option ROMs> at iomem 0xea000-0xebfff,0xc0000-0xc7fff on isa0
Oct 31 14:18:20 C061 kernel: pmtimer0 on isa0
Oct 31 14:18:20 C061 kernel: atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
Oct 31 14:18:20 C061 kernel: atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
Oct 31 14:18:20 C061 kernel: kbd0 at atkbd0
Oct 31 14:18:21 C061 kernel: psm0: failed to get data.
Oct 31 14:18:21 C061 kernel: psm0: <PS/2 Mouse> irq 12 on atkbdc0
Oct 31 14:18:21 C061 kernel: psm0: model IntelliMouse, device ID 3
Oct 31 14:18:21 C061 kernel: fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
Oct 31 14:18:21 C061 kernel: fdc0: FIFO enabled, 8 bytes threshold
Oct 31 14:18:21 C061 kernel: fd0: <1440-KB 3.5" drive> on fdc0 drive 0
Oct 31 14:18:21 C061 kernel: ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
Oct 31 14:18:21 C061 kernel: ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
Oct 31 14:18:21 C061 kernel: ppbus0: <Parallel port bus> on ppc0
Oct 31 14:18:21 C061 kernel: plip0: <PLIP network interface> on ppbus0
Oct 31 14:18:21 C061 kernel: lpt0: <Printer> on ppbus0
Oct 31 14:18:21 C061 kernel: lpt0: Interrupt-driven port
Oct 31 14:18:21 C061 kernel: ppi0: <Parallel I/O> on ppbus0
Oct 31 14:18:21 C061 kernel: sc0: <System console> at flags 0x100 on isa0
Oct 31 14:18:21 C061 kernel: sc0: VGA <16 virtual consoles, flags=0x300>
Oct 31 14:18:21 C061 kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
Oct 31 14:18:21 C061 kernel: sio0: type 16550A
Oct 31 14:18:21 C061 kernel: sio1 at port 0x2f8-0x2ff irq 3 on isa0
Oct 31 14:18:21 C061 kernel: sio1: type 16550A
Oct 31 14:18:21 C061 kernel: vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Oct 31 14:18:21 C061 kernel: unknown: <PNP0303> can't assign resources (port)
Oct 31 14:18:21 C061 kernel: unknown: <PNP0f13> can't assign resources (irq)
Oct 31 14:18:21 C061 kernel: unknown: <PNP0700> can't assign resources (port)
Oct 31 14:18:21 C061 kernel: unknown: <PNP0400> can't assign resources (port)
Oct 31 14:18:21 C061 kernel: unknown: <PNP0501> can't assign resources (port)
Oct 31 14:18:21 C061 kernel: Timecounters tick every 10.000 msec
Oct 31 14:18:21 C061 kernel: ad0: 4134MB <IBM-DCAA-34330> [8400/16/63] at ata0-master WDMA2
Oct 31 14:18:21 C061 kernel: acd0: CDROM <TOSHIBA CD-ROM XM-6102B> at ata1-master PIO3
Oct 31 14:18:21 C061 kernel: Mounting root from ufs:/dev/ad0s1a
Oct 31 14:18:21 C061 kernel: WARNING: / was not properly dismounted
Oct 31 14:18:21 C061 kernel: WARNING: /tmp was not properly dismounted
Oct 31 14:18:21 C061 kernel: WARNING: /usr was not properly dismounted
Oct 31 14:18:21 C061 kernel: WARNING: /var was not properly dismounted
Oct 31 14:19:27 C061 fsck: /dev/ad0s1e: 2 files, 1 used, 126838 free (14 frags, 15853 blocks, 0.0% fragmentation) 
Oct 31 14:19:59 C061 fsck: /dev/ad0s1f: 14030 files, 111287 used, 1501060 free (19276 frags, 185223 blocks, 1.2% fragmentation) 
Oct 31 14:20:03 C061 fsck: /dev/ad0s1d: 97 files, 195 used, 126644 free (36 frags, 15826 blocks, 0.0% fragmentation)