connect two linux boxes by a crossover cable - nmap

[Crucificator]

Yu Sun wrote:

>Dear Friends,
>
>As suggested by one friend, I tried to use 'nmap', it seems telnet
>server is running on one host, however, it is still unable to
>connenct from the other host, see the edited script below:
>
>--- script starts ---
>
>[root at yu0 root]# ping xia.yusun.net
>PING xia.yusun.net (192.168.1.2) 56(84) bytes of data.
>64 bytes from xia.yusun.net (192.168.1.2): icmp_seq=1 ttl=64
>time=0.118 ms
>64 bytes from xia.yusun.net (192.168.1.2): icmp_seq=2 ttl=64
>time=0.113 ms
>64 bytes from xia.yusun.net (192.168.1.2): icmp_seq=3 ttl=64
>time=0.116 ms
>
>--- xia.yusun.net ping statistics ---
>3 packets transmitted, 3 received, 0% packet loss, time 2011ms
>rtt min/avg/max/mdev = 0.113/0.115/0.118/0.012 ms
>
>[root at yu0 root]# nmap -sX -p 22-100 xianotebook
>
>Starting nmap V. 3.00 ( www.insecure.org/nmap/) 
>Interesting ports on xia.yusun.net (192.168.1.2):
>(The 77 ports scanned but not shown below are in state: closed)
>Port       State       Service
>22/tcp     open        ssh                    
>23/tcp     open        telnet                  
>
>Nmap run completed -- 1 IP address (1 host up) scanned in 2 seconds
>
>[root at yu0 root]# telnet xia.yusun.net
>Trying 192.168.1.2...
>telnet: connect to address 192.168.1.2: Connection refused
>
>[root at yu0 root]# ssh xia.yusun.net
>ssh: connect to host xia.yusun.net port 22: Connection refused
>
>----script end ----
>
>Tried as oridinary user, same results. I appreciate your help !
>
>Yu
>
>
>
>		
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>  
>
iptables output, maybe there lies the prob?