[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] AW: [FW1] why ICMP protocol not using port no like tcp udp??
ICMP is a Protocol like tcp or udp ICMP does not use Ports If you use ping the Sender sends an echo-request and receives an echo-reply as answer. Timo -----Ursprüngliche Nachricht----- Von: Sim, CT (Chee Tong) [mailto:[email protected]] Gesendet am: Freitag, 8. Dezember 2000 10:11 An: [email protected] Betreff: [FW1] why ICMP protocol not using port no like tcp udp?? Hi.. Dear all, 1)I wonder why ICMP not using using any port no like TCP, UDP, instead they are using MATCH which is mean by MATCH? I saw more than 1 type of ICMP service specified in my firewall, like ICMP-proto, ICMP-mask, ICMP request? What are the difference? 2)If I use normal ping service, which type of ICMP will take effect? 3)I found that when I surf the net thru my proxy server the server not only establish http service tcp protocol, but also ICMP protocol with unknown service why? ICMP also?? Tong ================================================================== De informatie opgenomen in dit bericht kan vertrouwelijk zijn en is uitsluitend bestemd voor de geadresseerde. Indien u dit bericht onterecht ontvangt wordt u verzocht de inhoud niet te gebruiken en de afzender direct te informeren door het bericht te retourneren. ================================================================== The information contained in this message may be confidential and is intended to be exclusively for the addressee. Should you receive this message unintentionally, please do not use the contents herein and notify the sender immediately by return e-mail. ================================================================== ============================================================================ ==== To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ============================================================================ ==== ================================================================================ To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================================================
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