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Am Freitag, 9. Januar 2004 07:36 schrieb mir Mark Hurst: |
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> > Probably you think ICMP is dangerous too. There are a lot of brain |
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> > dead admins who blocks ICMP packets and they wonder why connections |
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> > to some websites are broken or if they administrate the packet filter |
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> > before a webserver they wonder why some user grouches they wouldn't |
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> > get a connection to the web server. |
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> |
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> Ever heard of Smurf or Loki? |
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> |
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> If you allow all ICMP in you are indeed a brain-dead admin, in my |
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> opinion. Sure, host unreachable, DF should be allowed in, but why |
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> should an external host be able to send timestamp or subnet requests? |
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You can reject some unuseful things like that, but what I wanted to say is |
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that communication is not bad you connect to the internet to communicate. |
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There a different types of ICMP messages, you don't *need* all of them |
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but you should know, that communication and ICMP is not a bad thing. |
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mfg |
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Oli |
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-- |
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