Older blog entries for dma (starting at number 8)

initial version of imapfilter port for openbsd is here. very useful, if you use mua without mail sorting features, e.g. mutt.

i got some new devices for my hacking environment:

• usb mug warmer & hub (4 ports):

  uhub1 at uhub0 port 1
  uhub1: ALCOR Generic USB Hub, rev 1.10/3.12, addr 2
  uhub1: 4 ports with 4 removable, self powered

• usb to serial ata adapter:

  umass0 at uhub1 port 2 configuration 1 interface 0
  umass0: Generic Mass Storage Device, rev 2.00/1.26, addr 4
  umass0: using SCSI over Bulk-Only
  scsibus1 at umass0: 2 targets

  due to lack of sata 2 dvd-rw drives support in openbsd, i bought this device for my new dvd-rw drive

in action:

new vnd(4) tools in -current (fsck_vnd(8) and mount_vnd(8)) is really nice. make your own encrypted virtual filesystem just by making file of static size, creating mount point and adding two lines in ``/etc/ fstab'' file.

turning back to the sound problem on the ibm thinkpad 600e. sb(4) instead of clcs(4) is not best solution for this problem: this can do only 8 bit 22 kHz audio, but, regarding to CS4239 datasheet, sound up to 48 kHz is supported.

ibm used dirty hacks to map the I/O-space of the CS4239 chip to CS4610. clcs(4) driver always expects to find it paired with an AC'97 codec chip, while instead the PCI CS4610 is paired with the ISA CS4239. since ibm use hacks, i use hacks too. here is patch to fix this problem first last and all the time.

note: this is a hack and use it at your own risk!

sound_hack.tp600e.diff

funny page about unix which is not unix operating system: OtherUnix.

pfflowd is a very nice NetFlow sensor for OpenBSD-based routers. Also, I install flowd as a NetFlow collector on a different machine in the internal network. I rotate flowd log files every hour using logrotate and place flows from log to SQLite database. That give me ability to query some information from database using simple SQLite syntax in cgi application.

Type the following command:

spanning-tree portfast

for each Ethernet port (available only for switchport)

Blocking incorrect login attempts in IOS:

login block-for 20 attempts 2 within 20

Information about last 50 login failures:

sh login failures

this patch allow program names in the syslog configuration file to contain non-alphanumerical characters (but no non-printables).

syslogd.diff