How to add a directory to the PATH?

Question

Alexar

Asked: 2010-12-27 20:15:30 +0800 CST2010-12-27 20:15:30 +0800 CST 2010-12-27 20:15:30 +0800 CST

Network Access: I can't access 192.168.1.101 from 192.168.1.102

772

I'm running Ubuntu 10.04 on my PC with IP 192.168.1.101. every thing work fine, e.g. my web server is running and I can see http://localhost/ or http://192.168.1.101 properly.

But the problem is that I cannot see my PC from my laptop at 192.168.1.102 e.g. at my laptop http://192.168.1.101 gives Connection timed out in browser. or trying to telnet on any port leads to:

telnet: Unable to connect to remote host: Connection timed out

laptop is running a fresh install of Ubuntu as well and there is no setup for firewall stuff in both computers.

PS:

Both computers can ping each other well.
The router is a cicso linksys wireless ADSL modem.
Currently, I can connect to FTP server on the Windows running on 192.168.1.102 from 192.168.1.101 without problem.
I tested the address http://192.168.1.101 with my friends' laptops (They use Windows 7 and XP). both received "Connection was reset". It differs with my laptop's response.
Theses are commands ran on my 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)

port 80 is set to 0.0.0.0 well:

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 is empty:

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

commands on the 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

1 Answers

Voted

Scaine · Answer 1 · 2010-12-28T03:18:39+08:00

Scaine

2010-12-28T03:18:39+08:002010-12-28T03:18:39+08:00

Additional information you provided in your question points to an issue with your laptop's ethernet connection. There are over ten thousand frame errors reported in your ifconfig output.

Frame Errors: An incorrect CRC and a noninteger number of bytes are received. This is usually the result of collisions or a bad Ethernet device.

This is sometimes caused by a switch port being set to 100/full duplex when your card is configured as auto/auto. To confirm perform this on your laptop :

sudo apt-get install ethtool
sudo ethtool eth1

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