All systems related posts
to transfer a filesystem or directory while preserving permissions, special files and such, you can use the following :
# cd sourceDirectory
# tar cpf – . | (cd destinationDirectory && tar xpf – )
The first tar will archive the source directory and pipe it out to the second one which operates the extraction in the destination directory.
This post will be short, because it is actually easier than I expected … Anyway, considering my memory, better blog out that for later reference 😉
A bridge is a network device used to connect two or more network segments. You can achieve this easily on OpenBSD with the following commands :
# echo 'up' > /etc/hostname.if0
# echo 'up' > /etc/hostname.if1
# echo 'add if0 add if1 up' > /etc/bridgename.bridge0
This will setup the two interfaces if0 and if1 (replace with your own, like rl0, em0, etc etc) and add them into the bridge0.
Then you need to enable ip forwarding so that IP packets will pass from one interface to the others as needed. You do that by editing the file /etc/sysctl.conf and uncommenting the line which reads :
#net.inet.ip.forwarding=1Once this is all done, reboot to activate.
This bridge is IP-less, which means it is “harder” to attack. You can still filter at MAC level and at IP level through PF (the firewall of OpenBSD).
Tested on OpenBSD 3.9
Man pages :
Windows has a bad habit of enabling by default some shares on a new installation. These are, for example, C$, D$ (they give access to your partition roots) … ADMIN$, IPC$
Those shares are accessible by the administrators, but they could be a useless security breach.
Even worse, if you delete them, they will come back at the next start of the Server service starts…
If you wish to permanently disable them then create the following key in the registry (if it already exists, set the value to 0) :
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters\AutoShareWks
REG_DWORD = 0
more good informations here : http://www.petri.co.il/disable_administrative_shares.htm
if your boot block got corrupted (virus, or installation which went wrong), you may want to try to repair it by using the Recovery Console of Windows XP.
To do so, boot on the Windows XP CD and when asked, choose to repair the Windows XP installation by pushing R.
This will lead you to the Recovery Console. You will be asked for the installation to repair (ex : 1: C:\Windows), and then to enter the administrator’s password.
Then you can try to do a fixmbr (which is equivalent to the old fdisk /mbr) or a bootblock which will install a new boot block.
Be sure to understand what you do ! You might as well spoil your last chance to recover your installation with those commands !
not to me !! 😀
The OpenBSD project needs money to hold its events (such as hackaton, where developpers gather to implement features, or usual running costs).
If you think you don’t use OpenBSD, think again ! The project OpenSSH, which implements a free, and secure SSH implementation, comes from OpenBSD. It is widely used in many OSes and appliances …
We need OpenBSD !! Don’t hesitate to make a donation !
The original post
The OpenBSD project
The OpenSSH sister project
To allow a proxy to act as a tunnel for SSL connection as in HTTPS, you actually need to provide the HTTP method CONNECT. It took me some time to realize 😉
If you do this with Apache/mod_proxy, that means that you have to use the mod_proxy_connect and allow the CONNECT method.
Few pointers :
few useful commandes :
lsdev -C | grep scsi
will list all the SCSI interfaces of your machine
cfgmgr -l scsi0
will rescan the scsi0 bus to find and configure any newly attached SCSI peripheral.
Here is a little post to give a hint about setting up a printer on a Solaris 8 Workstation :
# lpadmin -p printerName -s printServer # lpadmin -p printerName -D "Printer description text" # lpadmin -d printerName # lpstat -p printerName
and then check you can print with :
# echo test | lp
Checkout this great Solaris 8 docs repository at Sun.com.
if you get this kind of “error” :
Dec 14 02:36:31 hostname StoreX (Dec 14, 2005 2:36:31 AM FQDN):P3:System hostname-t3 (XX.XX.XX.XX) - Unit-unit-1 - Power-Module-2 (u1pcu2) : Power supply unit has switched to battery. Fru ID: u1pcu2, Model: 300-1454-01(50), Serial Number: XXXXXX
Dec 14 02:58:31 hostname StoreX (Dec 14, 2005 2:58:30 AM FQDN):P3:System hostname-t3 (XX.XX.XX.XX) - Unit-unit-1 - Power-Module-2 (u1pcu2) : The FRU has some error. Fru ID: u1pcu2, Model: 300-1454-01(50), Serial Number: XXXXX
then be aware that a T3 performs a battery refresh every so and then (this is by default every 28 days, but can be modified in /etc/schd.conf). This battery refresh can provoke this kind of error messages which are no error at all …
when logged on the T3, you can see the state of each FRU with the command
fru stat
Example :
hostname-t3:/:fru stat CTLR STATUS STATE ROLE PARTNER TEMP ------ ------- ---------- ---------- ------- ---- u1ctr ready enabled master - 32.5 DISK STATUS STATE ROLE PORT1 PORT2 TEMP VOLUME ------ ------- ---------- ---------- --------- --------- ---- ------ u1d1 ready enabled data disk ready ready 34 v0 u1d2 ready enabled data disk ready ready 30 v0 u1d3 ready enabled data disk ready ready 43 v0 u1d4 ready enabled data disk ready ready 31 v0 u1d5 ready enabled data disk ready ready 39 v0 u1d6 ready enabled data disk ready ready 31 v0 u1d7 ready enabled data disk ready ready 32 v0 u1d8 ready enabled data disk ready ready 30 v0 u1d9 ready enabled standby ready ready 31 v0 LOOP STATUS STATE MODE CABLE1 CABLE2 TEMP ------ ------- ---------- ------- --------- --------- ---- u1l1 ready enabled master - - 27.5 u1l2 ready enabled slave - - 30.0 POWER STATUS STATE SOURCE OUTPUT BATTERY TEMP FAN1 FAN2 ------ ------- --------- ------ ------ ------- ------ ------ ------ u1pcu1 ready enabled line normal normal normal normal normal u1pcu2 ready enabled line normal normal normal normal normal