Index
> Projects and Ideas > [IDEA] FASM Firewall |
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Vasilev Vjacheslav 04 Jul 2006, 10:23
check www.codeproject.com for source code (c++)
ps. http://www.codeproject.com/internet/smfirewall/fire.zip |
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04 Jul 2006, 10:23 |
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comrade 05 Jul 2006, 07:05
look for an "ndis filter driver"
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05 Jul 2006, 07:05 |
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0x4e71 05 Jul 2006, 17:41
Crukko wrote: Did someone is going to write a firewall with fasm??? Hmm, well there are the linux ones like smoothwall, astaro etc, you can look but at those but of course they are all very far (huge projets, high level languages et) from the Fasm spirit. Nevertheless it's a really COOL project to do! And you can learn a lot about networking... Crukko wrote:
Heheh be VERY careful with this one, as it can make your system incredibly vulnerable. Anybody could spoof your provider's DNS server IP addresses then send you bogus authentications pertending to be that IP... if your f/w bans those IP's you are severely scr*w*d! 
/L |
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05 Jul 2006, 17:41 |
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madmatt 05 Jul 2006, 19:43
Completly off subject, but why is 0x4e71 your handle name?
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05 Jul 2006, 19:43 |
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0x4e71 05 Jul 2006, 20:34
madmatt wrote: Completly off subject, but why is 0x4e71 your handle name? Ehm 
It's a reference to: http://www.freescale.com/files/archives/doc/ref_manual/M68000PRM.pdf Code: Integer Instructions MOTOROLA M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL 4-147 NOP No Operation NOP (M68000 Family) Operation: None Assembler Syntax: NOP Attributes: Unsized Description: Performs no operation. The processor state, other than the program counter, is unaffected. Execution continues with the instruction following the NOP instruction. The NOP instruction does not begin execution until all pending bus cycles have completed. This synchronizes the pipeline and prevents instruction overlap. Condition Codes: Not affected. Instruction Format: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1 0 0 1 1 1 0 0 1 1 1 0 0 0 1 That binary string is 4e71 in hex, so.. my favorite instruction 
/L |
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05 Jul 2006, 20:34 |
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dreamhack 05 Jul 2006, 22:43
...so i posted a topic with a keylogger and now you want to make a firewall
just do not make that firewall like someone did in win xp sp2, that can be 'hacked' with some lines of vbscript code |
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05 Jul 2006, 22:43 |
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Crukko 14 Jul 2006, 09:52
Boyz: I found usefull source...working on
0x4e71:about DNS IP...did you (or anyone else) have any idea on how protect from this *bug* ????
I think the first step is to find and monitoring port and ip.... bye! |
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14 Jul 2006, 09:52 |
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Crukko 14 Jul 2006, 09:55
0x4e71: thinking about DNS problem....if someone try to use that IP and send wrong PW for 3 times....also DNS IP will be disabled, so your PC will not have internet access anymore just until you reset the IP.....I think is not a problem, don't you?
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14 Jul 2006, 09:55 |
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Dex4u 14 Jul 2006, 14:20
I am working on a bootable firewall written in fasm, much safer, to run on old PC.
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14 Jul 2006, 14:20 |
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0x4e71 14 Jul 2006, 22:43
Crukko: indeed, the problem is exactly that: not security in itself but a VERY easy way to denial of service attack you (no internet)... The solution is selective IP shunning, e.g. your firewall will not just ban ANY ip but will more intelligently select who is safe to ban and who could create problems (such as cutting you off the internet).... I believe one of the presentations at DEFCON 13 treated this subject extensively, I cannot remember which one though, all the mp3s and even the videos are available online so may be worth checking out anyway, (if I can remember exactly which one I'll post).
Cheers, /L |
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14 Jul 2006, 22:43 |
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