tunnel gizmo won't die

[will trillich <will@serensoft.com>]

how do i kill this tunnel tunl0 thingie?

# netstat -a
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
<snip>
tcp        0      0 1.2.3.4:domain          *:*                     LISTEN      
<snip>
udp        0      0 1.2.3.4:domain          *:*                                 
<snip>

# ifconfig tunl0
tunl0     Link encap:IPIP Tunnel  HWaddr
          inet addr:1.2.3.4  Mask:255.255.255.255
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0

i've tried

# ifconfig tunl0 down
# ip tunnel del dev tunl0
ioctl: No such device
# ifconfig tunl0
tunl0     Link encap:IPIP Tunnel  HWaddr   
          inet addr:1.2.3.4  Mask:255.255.255.255
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
# netstat -a | grep 1.2.3.4
tcp        0      0 1.2.3.4:domain          *:*                     LISTEN      
udp        0      0 1.2.3.4:domain          *:*                                 

where's the exterminator?