Kal Online Packet Filter

Hey guys as i promised here is my Packet Filter.
I tested if with a Friend of mine and i was able to fix all his crashing methods by Packet filtering,
but be careful if you block Packets that are need for normal play, players get kicked if they
try to send thoses Packets, so make smart filtering : )

How it works:

Shortcuts:
Press f for reload the Filter Settings
Press s to Toggle Console Silent Mode (on/off)


Server Settings:
[SERVER] << The Server on wich the Packet Filter Proxy runs
SERVER_BIND_IP=127.0.0.1 << Packet Filter Proxy IP
SERVER_BIND_PORT=30001 << Packet Filter Proxy PORT

[REDIRECT] << Redirect to Mainserver
REDIRECT_IP=127.0.0.1 << IP of Mainserver
REDIRECT_PORT=30002 << Port of Mainserver

Console:
[MODE]
CONSOLE_SILENT=0 << 0 OFF all packets will be printed, 1 ON No Packets will be printed

Filter:
[PACKET_SIZE_FILTER] << Filters all Packets with Size 20
20

[PACKET_SIZE_FILTER] << Filters all Packets with Size 59
59

[PACKET_HEADER_FILTER] << Filters all Packets wich begin with 0x16 Packet
0x16

[PACKET_HEADER_FILTER] << Filters all Packets wich begin with 0x17 Packet
0x17

[PACKET_CONTENT_FILTER] << Filter all Packets with Content 0x08 0x08 0xXX 0xXX 0xXX 0xXX 0x02 // 0x00 can be used as Wildcard like * in IP BLock (145.54.*.*)
0x08 0x08 0x00 0x00 0x00 0x02

[PACKET_CONTENT_FILTER] << Filter all Packets with Content 0x07 0x07
0x07 0x07

[PACKET_CONTENT_FILTER] << This for example will Filter all Packets
0x00

Report any bugs here and post if it works for you : )

thanks for great Release will test in on me server

keep going :)

http://im23.gulfup.com/927E1.jpg

Great release, MadKnight thank you so much for the awakening and new blood you're giving to kal community, we appreciate everything you do so much
To those who do not know what is Packet filtering?
Packet filtering is the process of passing or blocking packets at a network interface based on source and destination addresses, ports, or protocols. The process is used in conjunction with packet mangling and Network Address Translation (NAT).
Hopefully its close enough, greetings.

Thanks for Release MadKnight ! :thumbup1:

thnx madknight your the best

I want to tell you "Thank you,"
But it doesn't seem enough.

really good job ;) , keep going

Nice work but idk if its bug but i got problem so when 100+ players online they only out of game nothing like kick expel or so idk why but the snifer work good i think ss here
Attachment 119596

Quote:

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Originally Posted by XCoXde

Nice work but idk if its bug but i got problem so when 100+ players online they only out of game nothing like kick expel or so idk why but the snifer work good i think ss here
Attachment 119596

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What are your Filter Settings? It seems that the Connection is Dropped, because of some Filters.

sucks Question please : what is the important of this dll or what it can do ?

Quote:

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Originally Posted by Makova

sucks Question please : what is the important of this dll or what it can do ?

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This is no DLL, its an standalone Programm (.exe) wich allowes you to block incoming Packets from Players to Mainsever. It can be seen as an Shield.
Clients <-> Packet Filter <-> Mainserver
With smart Packet Filter settings you are able to filter "bad" Packets, so for example Crash Packets.
This is how it can be done.

1. Someone crash your Server
2. You look at my Packet Filter and take a look at the last incoming Packets, some of them are the Crash Packets (compare them with other Packets and you will find this "unnormal" Packet)
3. Setup an Filter, wich Filter these Packet, so on next time a Player send this Crash Packet, it will be filtered by my Packet Filter and the Client Connection will be dropped (kick)

But be carefully, if your filter is to imprecise it may Filter "good" Packets and normal Player can be kicked, so test it and look if only Crash Packets get filtered not normal one, if normal packets get filtered too, you need to make a better Filter.

It works with all Mainserver Versions, Clean, KOSP, Koem, KoemV2 or Custom, but the Packet filters differs if the Protection like KoemV2 crypt the Packet in an other way, so KoemV2 filter settings cant be used for Clean Mainserver Filter Settings.

If someone found good filter settings for some kind of crashes he could post it here.

I was able to fix 3 of 3 kinds of crashes that i tested by Packet filtering via content.

You can even use Packet Filter to deactivate whole Systems, like Mixing System (if you dont want to use the Original Mix System for example)

Or you could Filter every PlayerMove Packet, so no Player on your Server can move anymore (this would not be senseful ^^)

But the reason why i wrote it, is to stop Players crashing our Servers with serveral Methods, and many people here dont know how to use OllyDBG or any other Debugger to fix those crashes, so i give them the chance to Filter it with my Packet Filter System, its an esay and uncomplicated way to prevent Server Crashes.

Like a HackShield :rolleyes:

Quote:

---

Originally Posted by MadKnight

This is no DLL, its an standalone Programm (.exe) wich allowes you to block incoming Packets from Players to Mainsever. It can be seen as an Shield.
Clients <-> Packet Filter <-> Mainserver
With smart Packet Filter settings you are able to filter "bad" Packets, so for example Crash Packets.
This is how it can be done.

1. Someone crash your Server
2. You look at my Packet Filter and take a look at the last incoming Packets, some of them are the Crash Packets (compare them with other Packets and you will find this "unnormal" Packet)
3. Setup an Filter, wich Filter these Packet, so on next time a Player send this Crash Packet, it will be filtered by my Packet Filter and the Client Connection will be dropped (kick)

But be carefully, if your filter is to imprecise it may Filter "good" Packets and normal Player can be kicked, so test it and look if only Crash Packets get filtered not normal one, if normal packets get filtered too, you need to make a better Filter.

It works with all Mainserver Versions, Clean, KOSP, Koem, KoemV2 or Custom, but the Packet filters differs if the Protection like KoemV2 crypt the Packet in an other way, so KoemV2 filter settings cant be used for Clean Mainserver Filter Settings.

If someone found good filter settings for some kind of crashes he could post it here.

I was able to fix 3 of 3 kinds of crashes that i tested by Packet filtering via content.

You can even use Packet Filter to deactivate whole Systems, like Mixing System (if you dont want to use the Original Mix System for example)

Or you could Filter every PlayerMove Packet, so no Player on your Server can move anymore (this would not be senseful ^^)

But the reason why i wrote it, is to stop Players crashing our Servers with serveral Methods, and many people here dont know how to use OllyDBG or any other Debugger to fix those crashes, so i give them the chance to Filter it with my Packet Filter System, its an esay and uncomplicated way to prevent Server Crashes.

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you always take my likes ;)

Can the packet snifer block this crashing method idk i first time see
Attachment 119616

XCoXde u should fix ur CL's :congrats: