Hex, How to turn binary or decimal to hex

First go to http://www.shareordie.com/forum/index.php?showtopic=3269 to learn binary.

OK, 1,453,752 is 101100010111010111000 is binary, now we turn it into a Hex number.

First Hex numbers goes like this:
1=1
2=2
.
.
9=9
10=A
11=B
12=C
13=D
14=E
15=F

Now you need to take the first octet (the far right 4) and place it under this little grid:

8 4 2 1
--------
1 0 0 0 = 8

See the 1 under the 8 column?
That is what you add.

So the next octet is 1011, put it under the grid:

8 4 2 1
--------
1 0 0 0 = 8
1 0 1 1 = B

See 8+2+1=11, so you can't just say 11 you have to put it in a Hex number, which is B.
So the full Hex number of 1,453,752 is:

8 4 2 1
--------
1 0 0 0 = 8
1 0 1 1 = B
1 1 1 0 = E
0 0 1 0 = 2
0 1 1 0 = 6
0 0 0 1 = 1 <-- Just add zero if it isn't a full octet

162EB8

So if you want to turn a number in to the shorter version of Hex, just turn it into binary, then use this grid and you'll do fine



P.S. Thanks Korrupt for the number to work with

Have Notepad In Send To

Have Notepad In Send To



Many apply a registry tweak to have notepad as an option for unknown file types. We frequently see such files which are actually just text, but named with some odd file-extension. And then, some suspicious files which we want to make sure what the contents are. Well, in such cases where the registry tweak is applied, the downside happens to be that even some known files get associated with notepad - but no, all we want is to be able to open a file with notepad - the association part in such cases is unwanted interference. Also, notepad becomes a permanent fixture on the right-click menu - which is again an annoyance.

So what we do, is to have notepad as an option in the Send-To options, of the right-click menu in explorer. It fulfils the purpose to perfection (atleast, in my case). Here's what we do:

1. right-click desktop, choose "New >> Shortcut"
2. Type the location of the item - "notepad" - (that's all, no need to give path)
3. Next >> type name for shortcut - "Edit with Notepad"
4. Click finish
5. Now right-click this shortcut on the desktop, and choose properties.
6. Confirm that the "target" and "start in" fields are using variables - "%windir%\system32\notepad.exe" - (absolute paths will be problematic if you use this .LNK on machines other than your own)
7. Now, browse to "%UserProfile%\SendTo" in explorer (which means "C:\Documents and Settings\User_Name\SendTo\" folder)
8. And copy the "Edit with Notepad.lnk" file which you already created, to that folder.
9. So now, you can right-click on ANY file-type, and be offered an option to open with notepad, from the SendTo sub-menu.

So now, you just right-click on an .nfo or .eml or .diz file (which are associated with other programs, and are sometimes just plain-text files), and choose "Send To >> Edit with Notepad" and it will open in notepad!
No more botheration of applying registry tweaks for something as simple as this.

Hardware Firewall

The best firewall is a hardware firewall that is completely separate from your operating system. It need not be a dedicated router, could be an old pentium box running Linux. Below I have found some sites that have How To's on setting up an outside hardware router using an old computer and using a little linux program that fits on a single floppy disk.

Brief Description:
floppyfw is a router with the advanced firewall-capabilities in Linux that fits on one single floppy disc.

Features:
Access lists, IP-masquerading (Network Address Translation), connection tracked packet filtering and (quite) advanced routing. Package for traffic shaping is also available.
Requires only a 386sx or better with two network interface cards, a 1.44MB floppy drive and 12MByte of RAM ( for less than 12M and no FPU, use the 1.0 series, which will stay maintained. )
Very simple packaging system. Is used for editors, PPP, VPN, traffic shaping and whatever comes up. (now this is looking even more like LRP (may it rest in peace) but floppyfw is not a fork.)
Logging through klogd/syslogd, both local and remote.
Serial support for console over serial port.
DHCP server and DNS cache for internal networks.

floppyfw


h#tp://www.zelow.no/floppyfw/



Sentry Firewall CD-ROM is a Linux-based bootable CDROM suitable for use as an inexpensive and easy to maintain firewall, server, or IDS(Intrusion Detection System) Node. The system is designed to be immediately configurable for a variety of different operating environments via a configuration file located on a floppy disk, a local hard drive, and/or a network via HTTP(S), FTP, SFTP, or SCP.

The Sentry Firewall CD is a complete Linux system that runs off of an initial ramdisk, much like a floppy-based system, and a CD. The default kernel is a current 2.4.x series kernel with various Netfilter patches applied. An OpenWall-patched current 2.2.x kernel is also available on the CD.

Booting from the CDROM is a fairly familiar process. The BIOS execs the bootloader(Syslinux) - which then displays a bootprompt and loads the kernel and ramdisk into memory. Once the kernel is running, the ramdisk is then mounted as root(/). At this point our configuration scripts are run(written in perl) that configure the rest of the system. It is the job of these configure scripts to put the various startup and system files into the proper location using either what is declared in the configuration file(sentry.conf) or the system defaults located in the /etc/default directory.

Most of the critical files used at boot time can be replaced with your own copy when declared in the configuration file. This is essentially how we allow the user to configure the system using his/her own configuration and init files.

All of the binaries, files, scripts, etc, used to create the CD-ROM are also available on the CD-ROM. So, with a little practice, you can easily build and customize your own bootable Sentry Firewall CD. Please see the HOWTO for more details.


Sentry Firewall


ht*p://www.sentryfirewall.com/docs.html#overview