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ICMP erros. Packet sniffer somewhere, I think.

This is a discussion on ICMP erros. Packet sniffer somewhere, I think. within the Networking Support forums, part of the Tech Support Forum category. Hey people! My brother just came home today, and he started talking about how he was learning to "hack wireless


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Old 12-23-2009, 08:54 AM   #1
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Hey people! My brother just came home today, and he started talking about how he was learning to "hack wireless networks". He said that you could use a packet sniffer, I think, and analyze all the packets sent, and then have some kind of software to analyze that data, and that way you can get all kinds of information about the network, including passwords etc etc.

Long story short, I don't want him to get any passwords for the network. How can I prevent him from getting info on the network? I'm not very familiar with networking, but I know my way around computers. Since he came home, I've been getting ICMP errors all over the router log, I've NEVER seen one before, so my best guess is that he's causing them.

12/23/2009 17:44:36 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
2 12/23/2009 17:44:20 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
3 12/23/2009 17:44:12 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
4 12/23/2009 17:44:08 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
5 12/23/2009 17:44:06 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
6 12/23/2009 17:44:05 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
7 12/23/2009 17:44:05 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 109.96.239.82 ACCESS BLOCK
8 12/23/2009 17:42:42 Unsupported/out-of-order ICMP: ICMP(type:3, code:3) 192.168.1.34 219.75.18.131 ACCESS BLOCK

The first IP on that list is the source, the next one is the destination. Those are the errors I'm getting. I dunno if they are cause by him, but whatever to make things easier.

The weird thing, is that they are coming from my computer, that IP is my computer. From what you guys see, will he be able to get a hold of the Admin pass? What can I do to prevent him from getting the password?

As I said, these errors might not have anything to do with his packet "play", but whatever to make it easier for someone to understand. Any help is appreciated

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Old 12-23-2009, 03:36 PM   #2
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If you have WPA or WPA2 with a strong random key, let him hack away until he gets tired. He won't get anything.

As far as the errors, it sounds more like something on the computer, probably time to do malware and virus scans.

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Old 12-23-2009, 05:47 PM   #3
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But I cannot have an encryption on the network without having a password for accessing the network, right? Then I'll have to go around and teach people how to enter the password and whatnot. I only want to protect the admin password for the router. I think I left that out in the original post. But, it is only the admin pass that I don't want him to get, could he get ahold of that?

And I can't believe I didn't think of that, that the errors could be a virus :P Thanks!
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Old 12-23-2009, 06:02 PM   #4
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If you leave the wireless totally unencrypted, the least of your worries is the router's password!
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