[Q}Linux TCP/IP stack routing...

Discussion in 'Linux Networking' started by Paul, Jun 24, 2003.

  1. Paul

    Paul Guest

    Hi,

    When figuring out the next hop, does it consider source as well as destination?

    I thought that Routing only looks at destination.
    But, Linux routing info entry(in TCP/IP stack) consists of source+destination+TOS.

    Any comment?
     
    Paul, Jun 24, 2003
    #1
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  2. Paul

    hcckfn Guest

    |When figuring out the next hop, does it consider source as well as destination?
    |
    |I thought that Routing only looks at destination.
    |But, Linux routing info entry(in TCP/IP stack) consists of source+destination+TOS.
    |
    |Any comment?

    Consider a multihomed host... (you fill in the rest).
     
    hcckfn, Jun 24, 2003
    #2
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  3. Paul

    Ida Guest

    Yes, Linux looks the route to the source address to find out whether there
    is IP Spoofing.

    Ida Young
    Support of ITShield firewall
    www.itshield.com
     
    Ida, Jun 24, 2003
    #3
  4. Paul

    Paul Guest

    Still, routing is just to find a nexthop and send over to it. Why source matters?
     
    Paul, Jun 24, 2003
    #4
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