sshd stops accepting connections
Sopov Alexey
adler at smtp.ru
Sat Nov 13 08:04:34 PST 2004
I think your Hard Drive dies. Replace it.
Your system halts when it tries to access your ad0.
>> Today I suddenly couldn't log in via ssh to a server I upgraded to
>> FreeBSD 5.3-RELEASE 4 days ago. When I tried connect to port 22 using
>> telnet(1) the following just happend:
>>
>> [simon at zaphod:~] telnet 192.168.3.2 22
>> Trying 192.168.3.2...
>> Connected to jet.nitro.dk.
>> Escape character is '^]'.
>> Connection closed by foreign host.
>>
>> The servar had been running FreeBSD 5.2.1 for a while without
>> problems. ...
ZF> I had the exact same problem yesterday!! I installad FreeBSD 5.3-RELEASE
ZF> about a week ago. And on the night of Nov.11th, I've noticed that sshd2
ZF> stopped accepting connections. It dropped (closed) any connection
ZF> immediately. Everything else seemed to work on the server just fine. I also
ZF> use standard Unix authentication, nothing fancy at all. And I installed SSH2
ZF> from ports. I had to call the colo center and asked them to reset my server.
ZF> After it rebooted, SSH2 started to work again. Examining the content of the
ZF> log files, I've noticed the following lines:
ZF> Nov 11 13:45:10 www kernel: ad0: WARNING - WRITE_DMA interrupt was seen but
ZF> timeout fired LBA=2928095
ZF> Nov 11 13:49:52 www kernel: maxproc limit exceeded by uid 0, please see
ZF> tuning(7) and login.conf(5).
ZF> Nov 11 13:49:54 www kernel: Limiting closed port RST response from 212 to
ZF> 200 packets/sec
ZF> Nov 11 13:49:55 www kernel: Limiting closed port RST response from 226 to
ZF> 200 packets/sec
ZF> Nov 11 13:49:58 www kernel: Limiting closed port RST response from 223 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:00 www kernel: Limiting closed port RST response from 225 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:01 www kernel: Limiting closed port RST response from 224 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:03 www kernel: Limiting closed port RST response from 226 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:04 www kernel: Limiting closed port RST response from 223 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:07 www kernel: Limiting closed port RST response from 226 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:08 www kernel: Limiting closed port RST response from 223 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:10 www kernel: Limiting closed port RST response from 225 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:11 www kernel: Limiting closed port RST response from 224 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:13 www kernel: Limiting closed port RST response from 226 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:14 www kernel: Limiting closed port RST response from 233 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:17 www kernel: Limiting closed port RST response from 216 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:18 www kernel: Limiting closed port RST response from 223 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:20 www kernel: Limiting closed port RST response from 215 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:21 www kernel: Limiting closed port RST response from 233 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:23 www kernel: Limiting closed port RST response from 225 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:25 www kernel: Limiting closed port RST response from 211 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:27 www kernel: Limiting closed port RST response from 225 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:29 www kernel: Limiting closed port RST response from 225 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:31 www kernel: Limiting closed port RST response from 211 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:33 www kernel: Limiting closed port RST response from 224 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:35 www kernel: Limiting closed port RST response from 205 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:37 www kernel: Limiting closed port RST response from 224 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:51 www last message repeated 4 times
ZF> Nov 11 13:50:54 www kernel: Limiting closed port RST response from 222 to
ZF> 200 packets/sec
ZF> Nov 11 13:50:58 www kernel: Limiting closed port RST response from 216 to
ZF> 200 packets/sec
ZF> Nov 11 13:51:00 www kernel: Limiting closed port RST response from 208 to
ZF> 200 packets/sec
ZF> Because of the maxproc message, I then compiled a new kernel with 1024
ZF> users. (I used the GENERIC kernel up to this point.) Since I was now
ZF> building a new kernel, I commented out some drivers that I don't use, like
ZF> some SCSI devices and some ISA network interfaces, etc. The new kernel seems
ZF> to work great.
ZF> However, today (on Friday) I had another weird encounter. This afternoon,
ZF> for several minutes, I was unable to connect to the server at all: all tcp
ZF> connection appeared to hang indefinitely! But ping worked and it was fast as
ZF> always. I kept trying to get in via SSH2, and finally I was able to log in
ZF> (it took like 2 minutes to get the login prompt, while ping time was
ZF> normal). After switching to su, I issued the top command to see what is
ZF> going on. I never get any output. The system was apparently so busy with
ZF> something that top could not work. I had to force-close that connection. For
ZF> several minutes I tried to log in again via SSH2, I just wanted to issue a
ZF> reboot command at this time. When I was about to give up, suddenly, after
ZF> like 5 minutes the login prompt appeared and I was able to log in. Since
ZF> then EVERYTHING is working fine, I didn't even have to reboot, the server is
ZF> still running fine! I saw only these lines in the log file:
ZF> Nov 12 16:14:27 www kernel: ad0: WARNING - WRITE_DMA interrupt was seen but
ZF> timeout fired LBA=2416335
ZF> Nov 12 16:35:51 www kernel: Limiting icmp unreach response from 276 to 200
ZF> packets/sec
ZF> It seems to me that shortly after the WRITE_DMA warning (like 4 to 20
ZF> minutes later) all resources (I guess, processes) seemed to be consumed. It
ZF> has caused somehow sshd2 to stop accepting new connections at the first
ZF> time. The second time I greatly increased the maxproc number in the kernel
ZF> by setting maxusers to 1024. So at that time nothing really failed, but like
ZF> 20 minutes after the WRITE_DMA warning the system became very unresponsive
ZF> for at least 5 minutes. And then it just cured itself. I am very what is
ZF> causeing the WRITE_DMA warning... I'm willing to install any patches to
ZF> track this down. Can anyone provide me some patches?
ZF> Zoltan
ZF> PS: Some info about my system:
ZF> uname -a
ZF> FreeBSD www.xxxxxxxx.com 5.3-RELEASE FreeBSD 5.3-RELEASE #0: Fri Nov 12
ZF> 01:07:41 PST 2004
ZF> xxx at www.xxxxxxxx.com:/usr/obj/usr/src/sys/XXXXXXXX
ZF> i386
ZF> dmesg
ZF> Waiting (max 60 seconds) for system process `hpt_wt' to stop...done
ZF> Copyright (c) 1992-2004 The FreeBSD Project.
ZF> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
ZF> The Regents of the University of California. All rights reserved.
ZF> FreeBSD 5.3-RELEASE #0: Fri Nov 12 01:07:41 PST 2004
ZF> tss at www.frombach.com:/usr/obj/usr/src/sys/FROMBACH
ZF> Timecounter "i8254" frequency 1193182 Hz quality 0
ZF> CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2806.38-MHz 686-class CPU)
ZF> Origin = "GenuineIntel" Id = 0xf29 Stepping = 9
ZF>
ZF> Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
ZF> Hyperthreading: 2 logical CPUs
ZF> real memory = 1056899072 (1007 MB)
ZF> avail memory = 1023688704 (976 MB)
ZF> ACPI APIC Table: <AWARD AWRDACPI>
ZF> ioapic0: Changing APIC ID to 2
ZF> ioapic0 <Version 1.4> irqs 0-23 on motherboard
ZF> npx0: [FAST]
ZF> npx0: <math processor> on motherboard
ZF> npx0: INT 16 interface
ZF> acpi0: <AWARD AWRDACPI> on motherboard
ZF> acpi0: Power Button (fixed)
ZF> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
ZF> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
ZF> cpu0: <ACPI CPU (3 Cx states)> on acpi0
ZF> acpi_tz0: <Thermal Zone> on acpi0
ZF> acpi_button0: <Power Button> on acpi0
ZF> acpi_button1: <Sleep Button> on acpi0
ZF> pcib0: <ACPI Host-PCI bridge> port
ZF> 0x10e0-0x10ff,0x1000-0x10df,0x480-0x48f,0xcf8-0xcff on acpi0
ZF> pci0: <ACPI PCI bus> on pcib0
ZF> agp0: <SiS 661 host to AGP bridge> mem 0xd0000000-0xd7ffffff at device 0.0
ZF> on pci0
ZF> pcib1: <PCI-PCI bridge> at device 1.0 on pci0
ZF> pci1: <PCI bus> on pcib1
ZF> pci1: <display, VGA> at device 0.0 (no driver attached)
ZF> isab0: <PCI-ISA bridge> at device 2.0 on pci0
ZF> isa0: <ISA bus> on isab0
ZF> atapci0: <SiS 964 UDMA133 controller> port
ZF> 0x4000-0x400f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 2.5 on pci0
ZF> ata0: channel #0 on atapci0
ZF> ata1: channel #1 on atapci0
ZF> ohci0: <SiS 5571 USB controller> mem 0xe1104000-0xe1104fff irq 20 at device
ZF> 3.0 on pci0
ZF> ohci0: [GIANT-LOCKED]
ZF> usb0: OHCI version 1.0, legacy support
ZF> usb0: <SiS 5571 USB controller> on ohci0
ZF> usb0: USB revision 1.0
ZF> uhub0: SiS OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
ZF> uhub0: 3 ports with 3 removable, self powered
ZF> ohci1: <SiS 5571 USB controller> mem 0xe1100000-0xe1100fff irq 21 at device
ZF> 3.1 on pci0
ZF> ohci1: [GIANT-LOCKED]
ZF> usb1: OHCI version 1.0, legacy support
ZF> usb1: <SiS 5571 USB controller> on ohci1
ZF> usb1: USB revision 1.0
ZF> uhub1: SiS OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
ZF> uhub1: 3 ports with 3 removable, self powered
ZF> ohci2: <SiS 5571 USB controller> mem 0xe1101000-0xe1101fff irq 22 at device
ZF> 3.2 on pci0
ZF> ohci2: [GIANT-LOCKED]
ZF> usb2: OHCI version 1.0, legacy support
ZF> usb2: <SiS 5571 USB controller> on ohci2
ZF> usb2: USB revision 1.0
ZF> uhub2: SiS OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
ZF> uhub2: 2 ports with 2 removable, self powered
ZF> pci0: <serial bus, USB> at device 3.3 (no driver attached)
ZF> xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xe000-0xe07f mem
ZF> 0xe1103000-0xe110307f irq 17 at device 9.0 on pci0
ZF> miibus0: <MII bus> on xl0
ZF> bmtphy0: <3c905B 10/100 internal PHY> on miibus0
ZF> bmtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ZF> xl0: Ethernet address: 00:50:04:76:49:e7
ZF> fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
ZF> fdc0: [FAST]
ZF> fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ZF> sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on
ZF> acpi0
ZF> sio0: type 16550A
ZF> orm0: <ISA Option ROM> at iomem 0xc0000-0xcbfff on isa0
ZF> pmtimer0 on isa0
ZF> atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
ZF> atkbd0: <AT Keyboard> irq 1 on atkbdc0
ZF> kbd0 at atkbd0
ZF> atkbd0: [GIANT-LOCKED]
ZF> ppc0: parallel port not found.
ZF> sc0: <System console> at flags 0x100 on isa0
ZF> sc0: VGA <16 virtual consoles, flags=0x300>
ZF> sio1: configured irq 3 not in bitmap of probed irqs 0
ZF> sio1: port may not be enabled
ZF> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ZF> Timecounter "TSC" frequency 2806375656 Hz quality 800
ZF> Timecounters tick every 10.000 msec
ZF> ad0: 78167MB <Maxtor 6Y080L0/YAR41VW0> [158816/16/63] at ata0-master UDMA133
ZF> acd0: CDROM <CDU5211/YYS7> at ata1-master UDMA33
ZF> Mounting root from ufs:/dev/ad0s1a
ZF> ipfw2 initialized, divert disabled, rule-based forwarding disabled, default
ZF> to deny, logging disabled
ZF> my kernel config:
ZF> # $FreeBSD: src/sys/i386/conf/GENERIC,v 1.413.2.6.2.2 2004/10/24 18:02:52
ZF> scottl Exp $
ZF> machine i386
ZF> #cpu I486_CPU
ZF> #cpu I586_CPU
ZF> cpu I686_CPU
ZF> ident XXXXXXXX
ZF> maxusers 1024
ZF> options PMAP_SHPGPERPROC=400
ZF> options KVA_PAGES=384
ZF> # To statically compile in device wiring instead of /boot/device.hints
ZF> #hints "GENERIC.hints" # Default places to look for
ZF> devices.
ZF> options SCHED_4BSD # 4BSD scheduler
ZF> options INET # InterNETworking
ZF> #options INET6 # IPv6 communications protocols
ZF> options FFS # Berkeley Fast Filesystem
ZF> options SOFTUPDATES # Enable FFS soft updates support
ZF> options UFS_ACL # Support for access control lists
ZF> options UFS_DIRHASH # Improve performance on big
ZF> directories
ZF> options MD_ROOT # MD is a potential root device
ZF> #options NFSCLIENT # Network Filesystem Client
ZF> #options NFSSERVER # Network Filesystem Server
ZF> #options NFS_ROOT # NFS usable as /, requires
ZF> NFSCLIENT
ZF> #options MSDOSFS # MSDOS Filesystem
ZF> options CD9660 # ISO 9660 Filesystem
ZF> options PROCFS # Process filesystem (requires
ZF> PSEUDOFS)
ZF> options PSEUDOFS # Pseudo-filesystem framework
ZF> options GEOM_GPT # GUID Partition Tables.
ZF> options COMPAT_43 # Compatible with BSD 4.3 [KEEP
ZF> THIS!]
ZF> options COMPAT_FREEBSD4 # Compatible with FreeBSD4
ZF> options SCSI_DELAY=15000 # Delay (in ms) before probing SCSI
ZF> options KTRACE # ktrace(1) support
ZF> options SYSVSHM # SYSV-style shared memory
ZF> options SYSVMSG # SYSV-style message queues
ZF> options SYSVSEM # SYSV-style semaphores
ZF> options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time
ZF> extensions
ZF> options KBD_INSTALL_CDEV # install a CDEV entry in /dev
ZF> options AHC_REG_PRETTY_PRINT # Print register bitfields in debug
ZF> # output. Adds ~128k to driver.
ZF> options AHD_REG_PRETTY_PRINT # Print register bitfields in debug
ZF> # output. Adds ~215k to driver.
ZF> options ADAPTIVE_GIANT # Giant mutex is adaptive.
ZF> device apic # I/O APIC
ZF> # Bus support. Do not remove isa, even if you have no isa slots
ZF> device isa
ZF> #device eisa
ZF> device pci
ZF> # Floppy drives
ZF> device fdc
ZF> # ATA and ATAPI devices
ZF> device ata
ZF> device atadisk # ATA disk drives
ZF> #device ataraid # ATA RAID drives
ZF> device atapicd # ATAPI CDROM drives
ZF> #device atapifd # ATAPI floppy drives
ZF> #device atapist # ATAPI tape drives
ZF> options ATA_STATIC_ID # Static device numbering
ZF> # SCSI Controllers
ZF> #device ahb # EISA AHA1742 family
ZF> #device ahc # AHA2940 and onboard AIC7xxx devices
ZF> #device ahd # AHA39320/29320 and onboard AIC79xx devices
ZF> #device amd # AMD 53C974 (Tekram DC-390(T))
ZF> #device isp # Qlogic family
ZF> #device mpt # LSI-Logic MPT-Fusion
ZF> #device ncr # NCR/Symbios Logic
ZF> #device sym # NCR/Symbios Logic (newer chipsets + those
ZF> of `ncr')
ZF> #device trm # Tekram DC395U/UW/F DC315U adapters
ZF> #device adv # Advansys SCSI adapters
ZF> #device adw # Advansys wide SCSI adapters
ZF> #device aha # Adaptec 154x SCSI adapters
ZF> #device aic # Adaptec 15[012]x SCSI adapters,
ZF> AIC-6[23]60.
ZF> #device bt # Buslogic/Mylex MultiMaster SCSI adapters
ZF> #device ncv # NCR 53C500
ZF> #device nsp # Workbit Ninja SCSI-3
ZF> #device stg # TMC 18C30/18C50
ZF> # SCSI peripherals
ZF> device scbus # SCSI bus (required for SCSI)
ZF> device ch # SCSI media changers
ZF> device da # Direct Access (disks)
ZF> device sa # Sequential Access (tape etc)
ZF> device cd # CD
ZF> device pass # Passthrough device (direct SCSI access)
ZF> device ses # SCSI Environmental Services (and SAF-TE)
ZF> # RAID controllers interfaced to the SCSI subsystem
ZF> #device amr # AMI MegaRAID
ZF> #device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID
ZF> #device ciss # Compaq Smart RAID 5*
ZF> #device dpt # DPT Smartcache III, IV - See NOTES for
ZF> options
ZF> #device hptmv # Highpoint RocketRAID 182x
ZF> #device iir # Intel Integrated RAID
ZF> #device ips # IBM (Adaptec) ServeRAID
ZF> #device mly # Mylex AcceleRAID/eXtremeRAID
ZF> #device twa # 3ware 9000 series PATA/SATA RAID
ZF> # RAID controllers
ZF> #device aac # Adaptec FSA RAID
ZF> #device aacp # SCSI passthrough for aac (requires CAM)
ZF> #device ida # Compaq Smart RAID
ZF> #device mlx # Mylex DAC960 family
ZF> #device pst # Promise Supertrak SX6000
ZF> #device twe # 3ware ATA RAID
ZF> # atkbdc0 controls both the keyboard and the PS/2 mouse
ZF> device atkbdc # AT keyboard controller
ZF> device atkbd # AT keyboard
ZF> device psm # PS/2 mouse
ZF> device vga # VGA video card driver
ZF> #device splash # Splash screen and screen saver support
ZF> # syscons is the default console driver, resembling an SCO console
ZF> device sc
ZF> # Enable this for the pcvt (VT220 compatible) console driver
ZF> #device vt
ZF> #options XSERVER # support for X server on a vt console
ZF> #options FAT_CURSOR # start with block cursor
ZF> device agp # support several AGP chipsets
ZF> # Floating point support - do not disable.
ZF> device npx
ZF> # Power management support (see NOTES for more options)
ZF> #device apm
ZF> # Add suspend/resume support for the i8254.
ZF> device pmtimer
ZF> # PCCARD (PCMCIA) support
ZF> # PCMCIA and cardbus bridge support
ZF> #device cbb # cardbus (yenta) bridge
ZF> #device pccard # PC Card (16-bit) bus
ZF> #device cardbus # CardBus (32-bit) bus
ZF> # Serial (COM) ports
ZF> device sio # 8250, 16[45]50 based serial ports
ZF> # Parallel port
ZF> device ppc
ZF> device ppbus # Parallel port bus (required)
ZF> #device lpt # Printer
ZF> #device plip # TCP/IP over parallel
ZF> device ppi # Parallel port interface device
ZF> #device vpo # Requires scbus and da
ZF> # If you've got a "dumb" serial or parallel PCI card that is
ZF> # supported by the puc(4) glue driver, uncomment the following
ZF> # line to enable it (connects to the sio and/or ppc drivers):
ZF> #device puc
ZF> # PCI Ethernet NICs.
ZF> device de # DEC/Intel DC21x4x (``Tulip'')
ZF> device em # Intel PRO/1000 adapter Gigabit Ethernet
ZF> Card
ZF> device ixgb # Intel PRO/10GbE Ethernet Card
ZF> device txp # 3Com 3cR990 (``Typhoon'')
ZF> device vx # 3Com 3c590, 3c595 (``Vortex'')
ZF> # PCI Ethernet NICs that use the common MII bus controller code.
ZF> # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
ZF> device miibus # MII bus support
ZF> device bfe # Broadcom BCM440x 10/100 Ethernet
ZF> device bge # Broadcom BCM570xx Gigabit Ethernet
ZF> device dc # DEC/Intel 21143 and various workalikes
ZF> device fxp # Intel EtherExpress PRO/100B (82557, 82558)
ZF> device lge # Level 1 LXT1001 gigabit ethernet
ZF> device nge # NatSemi DP83820 gigabit ethernet
ZF> device pcn # AMD Am79C97x PCI 10/100 (precedence over
ZF> 'lnc')
ZF> device re # RealTek 8139C+/8169/8169S/8110S
ZF> device rl # RealTek 8129/8139
ZF> device sf # Adaptec AIC-6915 (``Starfire'')
ZF> device sis # Silicon Integrated Systems SiS 900/SiS
ZF> 7016
ZF> device sk # SysKonnect SK-984x & SK-982x gigabit
ZF> Ethernet
ZF> device ste # Sundance ST201 (D-Link DFE-550TX)
ZF> device ti # Alteon Networks Tigon I/II gigabit
ZF> Ethernet
ZF> device tl # Texas Instruments ThunderLAN
ZF> device tx # SMC EtherPower II (83c170 ``EPIC'')
ZF> device vge # VIA VT612x gigabit ethernet
ZF> device vr # VIA Rhine, Rhine II
ZF> device wb # Winbond W89C840F
ZF> device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'')
ZF> # ISA Ethernet NICs. pccard NICs included.
ZF> #device cs # Crystal Semiconductor CS89x0 NIC
ZF> # 'device ed' requires 'device miibus'
ZF> #device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards
ZF> #device ex # Intel EtherExpress Pro/10 and Pro/10+
ZF> #device ep # Etherlink III based cards
ZF> #device fe # Fujitsu MB8696x based cards
ZF> #device ie # EtherExpress 8/16, 3C507, StarLAN 10 etc.
ZF> #device lnc # NE2100, NE32-VL Lance Ethernet cards
ZF> #device sn # SMC's 9000 series of Ethernet chips
ZF> #device xe # Xircom pccard Ethernet
ZF> # ISA devices that use the old ISA shims
ZF> #device le
ZF> # Wireless NIC cards
ZF> #device wlan # 802.11 support
ZF> #device an # Aironet 4500/4800 802.11 wireless NICs.
ZF> #device awi # BayStack 660 and others
ZF> #device wi # WaveLAN/Intersil/Symbol 802.11 wireless
ZF> NICs.
ZF> #device wl # Older non 802.11 Wavelan wireless NIC.
ZF> # Pseudo devices.
ZF> device loop # Network loopback
ZF> device mem # Memory and kernel memory devices
ZF> device io # I/O device
ZF> device random # Entropy device
ZF> device ether # Ethernet support
ZF> device sl # Kernel SLIP
ZF> device ppp # Kernel PPP
ZF> device tun # Packet tunnel.
ZF> device pty # Pseudo-ttys (telnet etc)
ZF> device md # Memory "disks"
ZF> device gif # IPv6 and IPv4 tunneling
ZF> #device faith # IPv6-to-IPv4 relaying (translation)
ZF> # The `bpf' device enables the Berkeley Packet Filter.
ZF> # Be aware of the administrative consequences of enabling this!
ZF> device bpf # Berkeley packet filter
ZF> # USB support
ZF> device uhci # UHCI PCI->USB interface
ZF> device ohci # OHCI PCI->USB interface
ZF> device usb # USB Bus (required)
ZF> #device udbp # USB Double Bulk Pipe devices
ZF> device ugen # Generic
ZF> device uhid # "Human Interface Devices"
ZF> device ukbd # Keyboard
ZF> #device ulpt # Printer
ZF> device umass # Disks/Mass storage - Requires scbus and da
ZF> device ums # Mouse
ZF> #device urio # Diamond Rio 500 MP3 player
ZF> #device uscanner # Scanners
ZF> # USB Ethernet, requires mii
ZF> #device aue # ADMtek USB Ethernet
ZF> #device axe # ASIX Electronics USB Ethernet
ZF> #device cue # CATC USB Ethernet
ZF> #device kue # Kawasaki LSI USB Ethernet
ZF> #device rue # RealTek RTL8150 USB Ethernet
ZF> # FireWire support
ZF> #device firewire # FireWire bus code
ZF> #device sbp # SCSI over FireWire (Requires scbus and da)
ZF> #device fwe # Ethernet over FireWire (non-standard!)
ZF> my make.conf file:
ZF> CPUTYPE?=p4
ZF> #NO_CPU_CFLAGS= true # Don't add -march=<cpu> to CFLAGS automatically
ZF> #NO_CPU_COPTFLAGS=true # Don't add -march=<cpu> to COPTFLAGS automatically
ZF> #COPTFLAGS= -O -pipe # Yes, this line is commented out!
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