Ну не умею я route читать.
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
root@htpc:/home/user# route -e
Таблица маршутизации ядра протокола IP
Destination Gateway Genmask Flags MSS Window irtt Iface
default 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
link-local * 255.255.0.0 U 0 0 0 wlan0
192.168.1.0 * 255.255.255.0 U 0 0 0 wlan0
root@htpc:/home/user# route -e
Таблица маршутизации ядра протокола IP
Destination Gateway Genmask Flags MSS Window irtt Iface
default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
link-local * 255.255.0.0 U 0 0 0 wlan0
192.168.1.0 * 255.255.255.0 U 0 0 0 wlan0
192.168.1.1 * 255.255.255.255 UH 0 0 0 eth0
192.168.2.0 * 255.255.255.0 U 0 0 0 eth0
root@htpc:/home/user# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0b:e0:f0:00:ed
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:615 errors:0 dropped:0 overruns:0 frame:0
TX packets:1278 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:46353 (46.3 KB) TX bytes:124594 (124.5 KB)
Interrupt:41 Base address:0xe000
lo Link encap:Локальная петля (Loopback)
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1116 errors:0 dropped:0 overruns:0 frame:0
TX packets:1116 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:106852 (106.8 KB) TX bytes:106852 (106.8 KB)
wlan0 Link encap:Ethernet HWaddr 90:f6:52:6a:33:1e
inet addr:192.168.1.173 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::92f6:52ff:fe6a:331e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4047 errors:0 dropped:0 overruns:0 frame:0
TX packets:3458 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3786417 (3.7 MB) TX bytes:1153436 (1.1 MB)