Estou executando o Ubuntu 10.04 no meu PC com o IP 192.168.1.101. tudo funciona bem, por exemplo meu servidor da web está em execução e posso ver o link ou link corretamente
Mas o problema é que não consigo ver meu PC do meu laptop em 192.168.1.102
por exemplo. no meu laptop link dá Conexão esgotada no navegador.
ou tentar telnet em qualquer porta leva a:
telnet: Unable to connect to remote host: Connection timed out
O
laptop também está executando uma nova instalação do Ubuntu e não há configuração para o firewall em ambos os computadores.
PS:
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Ambos os computadores podem ping
um do outro.
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O roteador é um modem ADSL sem fio cicso da Linksys.
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Atualmente, posso me conectar ao servidor FTP no Windows em execução no 192.168.1.102 de 192.168.1.101 sem problemas.
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Testei o endereço link com os laptops dos meus amigos (Eles usam o Windows 7 e XP). ambos receberam " Conexão foi redefinida ". Isso difere da resposta do meu laptop.
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Teses são comandos executados no meu PC, 192.168.1.101:
ifconfig
:
adp@adp-desktop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:26:18:e1:8e:cf
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe70::226:18ff:fee1:8ecf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1831935 errors:0 dropped:0 overruns:0 frame:0
TX packets:1493786 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1996855925 (1.9 GB) TX bytes:215288238 (215.2 MB)
Interrupt:27 Base address:0xa000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:951742 errors:0 dropped:0 overruns:0 frame:0
TX packets:951742 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:494351095 (494.3 MB) TX bytes:494351095 (494.3 MB)
vmnet1 Link encap:Ethernet HWaddr 00:50:46:c0:00:01
inet addr:192.168.91.1 Bcast:192.168.91.255 Mask:255.255.255.0
inet6 addr: fe70::250:56ff:fec0:1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:50 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
vmnet8 Link encap:Ethernet HWaddr 00:50:46:c0:00:08
inet addr:192.168.156.1 Bcast:192.168.156.255 Mask:255.255.255.0
inet6 addr: fe70::250:56ff:fec0:8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:51 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
a porta 80 está definida como 0.0.0.0 bem:
adp@adp-desktop:~$ netstat -ln | grep 'LISTEN '
tcp 0 0 127.0.0.1:52815 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:4559 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7634 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5269 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5280 0.0.0.0:* LISTEN
tcp 0 0 127.0.1.1:7777 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:33601 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5222 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
tcp6 0 0 :::139 :::* LISTEN
tcp6 0 0 ::1:631 :::* LISTEN
tcp6 0 0 :::445 :::* LISTEN
/etc/hosts.deny
está vazio:
adp@adp-desktop:~$ cat /etc/hosts.deny
# /etc/hosts.deny: list of hosts that are _not_ allowed to access the system.
# See the manual pages hosts_access(5) and hosts_options(5).
#
# Example: ALL: some.host.name, .some.domain
# ALL EXCEPT in.fingerd: other.host.name, .other.domain
#
# If you're going to protect the portmapper use the name "portmap" for the
# daemon name. Remember that you can only use the keyword "ALL" and IP
# addresses (NOT host or domain names) for the portmapper, as well as for
# rpc.mountd (the NFS mount daemon). See portmap(8) and rpc.mountd(8)
# for further information.
#
# The PARANOID wildcard matches any host whose name does not match its
# address.
#
# You may wish to enable this to ensure any programs that don't
# validate looked up hostnames still leave understandable logs. In past
# versions of Debian this has been the default.
# ALL: PARANOID
netstat -l
:
adp@adp-desktop:~$ netstat -l
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 localhost:52815 *:* LISTEN
tcp 0 0 *:hylafax *:* LISTEN
tcp 0 0 *:www *:* LISTEN
tcp 0 0 *:4369 *:* LISTEN
tcp 0 0 localhost:7634 *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 *:xmpp-server *:* LISTEN
tcp 0 0 localhost:ipp *:* LISTEN
tcp 0 0 *:smtp *:* LISTEN
tcp 0 0 *:5280 *:* LISTEN
tcp 0 0 adp-desktop:7777 *:* LISTEN
tcp 0 0 *:33601 *:* LISTEN
tcp 0 0 *:xmpp-client *:* LISTEN
tcp 0 0 localhost:mysql *:* LISTEN
tcp6 0 0 [::]:netbios-ssn [::]:* LISTEN
tcp6 0 0 localhost:ipp [::]:* LISTEN
tcp6 0 0 [::]:microsoft-ds [::]:* LISTEN
udp 0 0 *:bootpc *:*
udp 0 0 *:mdns *:*
udp 0 0 *:47467 *:*
udp 0 0 192.168.1.10:netbios-ns *:*
udp 0 0 192.168.91.1:netbios-ns *:*
udp 0 0 192.168.156.:netbios-ns *:*
udp 0 0 *:netbios-ns *:*
udp 0 0 192.168.1.1:netbios-dgm *:*
udp 0 0 192.168.91.:netbios-dgm *:*
udp 0 0 192.168.156:netbios-dgm *:*
udp 0 0 *:netbios-dgm *:*
raw 0 0 *:icmp *:* 7
netstat -rn
:
adp@adp-desktop:~$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.91.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet1
192.168.156.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet8
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
comandos no laptop, 192.168.1.102:
ifconfig:
root@fakeuser-laptop:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1c:33:a2:31:15
UP BROADCAST RUNNING MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:21
eth1 Link encap:Ethernet HWaddr 00:2d:d9:3e:1f:6c
inet addr:192.168.1.102 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe70::21d:d9ff:fe3e:1f6c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5681 errors:0 dropped:0 overruns:0 frame:10313
TX packets:6717 errors:6 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4055251 (4.0 MB) TX bytes:779308 (779.3 KB)
Interrupt:18
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:206 errors:0 dropped:0 overruns:0 frame:0
TX packets:206 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15172 (15.1 KB) TX bytes:15172 (15.1 KB)
netstat -rn
:
root@fakeuser-laptop:~# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth1
telnet
:
fakeuser@fakeuser-laptop:~$ telnet 192.168.1.101 25
Trying 192.168.1.101...
telnet: Unable to connect to remote host: Connection timed out
fakeuser@fakeuser-laptop:~$ telnet 192.168.1.101 22
Trying 192.168.1.101...
telnet: Unable to connect to remote host: Connection timed out
fakeuser@fakeuser-laptop:~$ telnet 192.168.1.101 80
Trying 192.168.1.101...
telnet: Unable to connect to remote host: Connection timed out