>>729さん、ifconfigコマンドの結果です。ping 192.168.0.1（ルーター）は通りました。

#ifconfig -a
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.168.0.4 netmask 0xffffff00 broadcast 192.168.0.255
inet6 fe80::290::ccff::fe08:6ad4%vr0 prefixlen 64 scopeid 0x1
either 00:90:cc:08:6a:d4
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
plip0: flags=108810<POINTPOINT,SIMPLEX,MULTICAST> mtu 1500
lo0: flags=8849<UP,LOOPBACK,LUNNING,MULTICAST> mtu 16384
inet127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3