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README for iftop $Id: README,v 1.8 2003/06/06 22:42:34 pdw Exp $ Read the INSTALL file, manual page and source code for more information. iftop must be run as root. KNOWN ISSUES RedHat 7.2: There is a bug in the version of ncurses distibuted with RedHat 7.2 that will cause iftop to segfault. The RPM in RedHat's Rawhide distribution fixes this. Slackware 8.1: You may need to upgrade your libpcap (by updating the tcpdump package) in order to compile iftop. FreeBSD 4.7: This version of FreeBSD lacks a proper gethostbyaddr_r function. You should choose an alternative name resolution technique using the --with-resolver=... option to configure. Solaris: On Solaris, iftop has to run in promiscuous mode in order to capture outgoing packets. iftop autoconfigures to run in promiscuous mode on Solaris, but will filter out non-broadcast packets which are not addressed to or from localhost. On Solaris, the -p option merely disables that filter. If you have some other sort of system that behaves like Solaris in needing promiscuous mode, you can pass --enable-default-promiscuous to configure to enable this behavior. Cf. http://www.tcpdump.org/lists/workers/2002/02/msg00010.html The version of curses distributed with Solaris may not be sufficient for iftop's needs. You will probably need ncurses or similar.