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Unformatted text preview: rivilege and then type:
vangogh # sysctl -w nat.inet.ip.ttl=128
The following parameters can be changed.
If 0 (default), IP datagrams are not forwarded. If 1, forwarding is enabled.
If 1 (default), the host will send ICMP redirects when forwarding IP datagrams. If 0,
ICMP redirects are not sent. file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/append_e.htm (15 of 16) [12/09/2001 14.48.06] Appendix E: Configurable Options net.inet.ip.tti
The default TTL for both TCP and UDP. The default is 64.
If 0 (default), the host does not respond to ICMP address mask requests. If 1, it does
If 1 (default), UDP checksums are calculated for outgoing UDP datagrams, and incoming
UDP datagrams containing nonzero checksums have their checksum verified. If 0,
outgoing UDP datagrams do not contain a checksum, and no checksum verification is
performed on incoming UDP datagrams, even if the sender calculated a checksum.
Additionally, numerous variables that we've described earlier in this appendix are
scattered among various source files (tcp_keepidle, subnetsarelocal, etc.) and
can be modified. file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/append_e.htm (16 of 16) [12/09/2001 14.48.06] Appendix F: Source Code Availability Source Code Availability
This book uses many publicly available software packages. This appendix provides
additional details on how to obtain this software.
The technique used to obtain this software is called anonymous FTP, where FTP is the
standard Internet File Transfer Protocol (Chapter 27). Section 27.3 shows an example of
anonymous FTP. For a background on Internet resources in general, and specifically
anonymous FTP, refer to any of the recently available books on the Internet, such as
[LaQuey 1993] or [Krol 1992].
The hosts listed here are believed to be the primary site where the package is available.
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