/usr/ is in iptables-dev 1.4.21-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/linux/
/usr/include/linux/netfilter_ipv4/
/usr/include/linux/netfilter_ipv4/ip_queue.h
/usr/include/xtables-version.h
/usr/include/xtables.h
/usr/include/libiptc/
/usr/include/libiptc/xtcshared.h
/usr/include/libiptc/libip6tc.h
/usr/include/libiptc/ipt_kernel_headers.h
/usr/include/libiptc/libxtc.h
/usr/include/libiptc/libiptc.h
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libip4tc.pc
/usr/lib/pkgconfig/libip6tc.pc
/usr/lib/pkgconfig/libiptc.pc
/usr/lib/pkgconfig/xtables.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/iptables-dev/
/usr/share/doc/iptables-dev/html/
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-8.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-5.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-2.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-6.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-5.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-9.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-7.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-7.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-8.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-9.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-1.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-3.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-6.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-4.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO.html
/usr/share/doc/iptables-dev/html/netfilter-extensions-HOWTO-3.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-2.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-4.html
/usr/share/doc/iptables-dev/html/netfilter-hacking-HOWTO-1.html
/usr/share/doc/iptables-dev/copyright
/usr/share/doc-base/
/usr/share/doc-base/netfilter-extensions
/usr/share/doc-base/netfilter-hacking
/usr/share/doc/iptables-dev/changelog.Debian.gz