Nemesis

nemesis tcp -v -S 192.168.241.1 -D 192.168.240.1 -fA -fP -y 80 -x 3001 -P sux -d eth0

TCP Packet Injection -=- The NEMESIS Project Version 1.4 (Build 26)
              [MAC] 00:15:F2:2F:E6:EC > FF:FF:FF:FF:FF:FF
    [Ethernet type] IP (0x0800)
               [IP] 192.168.241.1 > 192.168.240.1
            [IP ID] 56135
         [IP Proto] TCP (6)
           [IP TTL] 255
           [IP TOS] 0x00
   [IP Frag offset] 0x0000
    [IP Frag flags] 
        [TCP Ports] 3001 > 80
        [TCP Flags] PSH 
[TCP Urgent Pointer] 0
  [TCP Window Size] 4096
Wrote 1434 byte TCP packet through linktype DLT_EN10MB.
TCP Packet Injected