Socket sniffer python only sniff port 22

Question

I am programming a sniffer in python with sockets and I am not sure why I only sniff on the port 22. I am in a machine connected via ssh from ip 10.0.0.2 to 10.0.0.3 and when I sniff I only sniff the ssh traffic, I am trying this for sniffing non port 22 traffic:

import socket
from struct import *

print 'Bienvenido'

s = socket.socket(socket.AF_INET,socket.SOCK_RAW,socket.IPPROTO_TCP)

while True:
    packet = s.recvfrom(65000)
    packet = packet[0]
    ip_header = packet[0:20]
    iph = unpack('!BBHHHBBH4s4s' , ip_header)

    ip_src = socket.inet_ntoa(iph[8])
    ip_dst = socket.inet_ntoa(iph[9])

    tcp_header = packet[20:40]
    tcp_h = unpack('!HHLLBBHHH',tcp_header)
    src_port = tcp_h[0]
    dst_port = tcp_h[1]
    if str(dst_port)!="22":
        print 'ip_src : ' + ip_src
        print 'ip dst : ' + ip_dst
        print 'src port: ' + str(src_port)
        print 'dst port: ' + str(dst_port)

But I don't sniff anything, if I change into if str(dst_port)!="22": I sniff the traffic from 10.0.0.2 to 10.0.0.3. On the remote machine I have started tcpdump sniffing on the port 80, connected to google via telnet to the port 80, I have also tried with FTP traffic but no success, and I sniff in tcpdump but not on my sniffer. Does anyone what is maybe happening¿? Thank you in advance