Routing

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  • 1.  RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-20-2013 12:45

    Hello Experts

     

    I am making RE firewall filter for IPV6. But I am confuse between  ICMP, ICMP6 and ICMPV6? Could you please clear it

     

    set term 1 from next-header ?

     

    icmp Internet Control Message Protocol
    icmp6 Internet Control Message Protocol Version 6
    icmpv6 Internet Control Message Protocol version 6



  • 2.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-20-2013 13:33
    Hello,

    I checked the implementation:

    next-header icmp is translated to next-header 1
    next-header icmp6 is translated to next-header 58
    next-header icmpv6 is translated to next-header 58

    In IPv6, ICMPv6 packets have next-header 58.

    My recommendation is to use icmp6 keyword.

    If it helps, please consider accepting as solution + kudos 🙂

    Ato


  • 3.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-20-2013 20:05

    But I still have confusion why they have three types of icmp?



  • 4.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)
    Best Answer

    Posted 10-21-2013 12:38

    "then next-header" can be followed by a number. And icmp, icmp6, icmpv6 are simply aliases for numbers (the ones mentioned in the previous post).



  • 5.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-21-2013 12:47

    So you mean all theree are same?



  • 6.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-21-2013 13:07
    No, look at my first answer. icmp6 and icmpv6 are the same as they map to the same number. icmp maps to a different number and is NOT good for IPv6, better don't use it.


  • 7.  RE: RE Firewall Filter (ICMP VS ICMP6 VS ICMPV6)

    Posted 10-21-2013 20:04

    ok. Thanks