Network problems with fedora core test 2

[alexis]

hi everybody !!

i have some trouble with my network configuration in fedora core 2

i have set up my ip, the gateway and the dns servers for my connection, 
but i have no acces to internet with any navigator :(

if  i  do  'ping  www.google.com'   i  obtain  a  response,  but i can't 
connect to it.

this is the resault  when i do  'dig  yahoo.com'


; <<>> DiG 9.2.3 <<>> yahoo.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25556
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 5, ADDITIONAL: 5

;; QUESTION SECTION:
;yahoo.com.            IN    A

;; ANSWER SECTION:
yahoo.com.        204    IN    A    216.109.127.30
yahoo.com.        204    IN    A    66.218.71.112
yahoo.com.        204    IN    A    66.218.71.113
yahoo.com.        204    IN    A    66.218.71.114
yahoo.com.        204    IN    A    216.109.127.28
yahoo.com.        204    IN    A    216.109.127.29

;; AUTHORITY SECTION:
yahoo.com.        5019    IN    NS    ns1.yahoo.com.
yahoo.com.        5019    IN    NS    ns2.yahoo.com.
yahoo.com.        5019    IN    NS    ns3.yahoo.com.
yahoo.com.        5019    IN    NS    ns4.yahoo.com.
yahoo.com.        5019    IN    NS    ns5.yahoo.com.

;; ADDITIONAL SECTION:
ns1.yahoo.com.        82898    IN    A    66.218.71.63
ns2.yahoo.com.        76245    IN    A    66.163.169.170
ns3.yahoo.com.        170379    IN    A    217.12.4.104
ns4.yahoo.com.        88664    IN    A    63.250.206.138
ns5.yahoo.com.        78441    IN    A    216.109.116.17

;; Query time: 226 msec
;; SERVER: 80.58.0.33#53(80.58.0.33)
;; WHEN: Mon Apr 12 23:34:38 2004
;; MSG SIZE  rcvd: 293




and this is the result when i  do  'iptables -L -v -n'




Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               
destination        
    2   156 RH-Firewall-1-INPUT  all  --  *      *       
0.0.0.0/0            0.0.0.0/0          

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               
destination        
    0     0 RH-Firewall-1-INPUT  all  --  *      *       
0.0.0.0/0            0.0.0.0/0          

Chain OUTPUT (policy ACCEPT 5 packets, 300 bytes)
 pkts bytes target     prot opt in     out     source               
destination        

Chain RH-Firewall-1-INPUT (2 references)
 pkts bytes target     prot opt in     out     source               
destination        
    0     0 ACCEPT     all  --  lo     *       0.0.0.0/0            
0.0.0.0/0          
    0     0 ACCEPT     all  --  sit0   *       0.0.0.0/0            
0.0.0.0/0          
    2   156 ACCEPT     all  --  eth0   *       0.0.0.0/0            
0.0.0.0/0          
    0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            
0.0.0.0/0           icmp type 255
    0     0 ACCEPT     esp  --  *      *       0.0.0.0/0            
0.0.0.0/0          
    0     0 ACCEPT     ah   --  *      *       0.0.0.0/0            
0.0.0.0/0          
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            
0.0.0.0/0           state RELATED,ESTABLISHED
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:80
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:443
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:21
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:25
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:22
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            
0.0.0.0/0           state NEW tcp dpt:23
    0     0 REJECT     all  --  *      *       0.0.0.0/0            
0.0.0.0/0           reject-with icmp-host-prohibited


i seem to have loopback enabled .


does anybody know  what else can i do ??


thanks in advance