LinuxQuestions.org
Visit Jeremy's Blog.
Home Forums Tutorials Articles Register
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
Reload this Page Can ssh from a computer, but not into it (no route to host)
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices


Reply
  Search this Thread
Old 04-11-2010, 02:39 PM   #1
Daravon
Member
 
Registered: Mar 2006
Posts: 170

Rep: Reputation: 15
Can ssh from a computer, but not into it (no route to host)

I have 3 computers on a local home network. Computer 1 is not receiving incoming anything from other computers on the network, and I don't know why. The regular internet works fine.

Computer 1 can ping and ssh into either 2 or 3. 2 can ping and ssh into 3 and vice versa. But nothing can ping OR ssh into 1. Trying to do so says "no route to host".

All computers are running Ubuntu Karmic. I don't even know where to start figuring out what's causing this, but it's probably something simple
 
Old 04-11-2010, 03:23 PM   #2
AlucardZero
Senior Member
 
Registered: May 2006
Location: USA
Distribution: Debian
Posts: 4,824

Rep: Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615
Are the IPs, netmasks, and gateways for the three all correct?
 
Old 04-11-2010, 03:33 PM   #3
Daravon
Member
 
Registered: Mar 2006
Posts: 170

Original Poster
Rep: Reputation: 15
I don't know; how can I check?

*is noob*

I'm using the IPs that I found listed in the web-based control panel of my wireless router.
 
Old 04-11-2010, 03:59 PM   #4
AlucardZero
Senior Member
 
Registered: May 2006
Location: USA
Distribution: Debian
Posts: 4,824

Rep: Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615
/sbin/ifconfig -a on each
 
Old 04-11-2010, 05:16 PM   #5
Daravon
Member
 
Registered: Mar 2006
Posts: 170

Original Poster
Rep: Reputation: 15
ifconfig shows that I've been using the correct IP. I don't know about the netmasks and gateways.

Code:
chaz@c1:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:e0:4d:30:8d:1e  
          UP BROADCAST 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:32 Base address:0xe000 

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:191 errors:0 dropped:0 overruns:0 frame:0
          TX packets:191 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:23130 (23.1 KB)  TX bytes:23130 (23.1 KB)

vboxnet0  Link encap:Ethernet  HWaddr 0a:00:27:00:00:00  
          BROADCAST 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)

wlan0     Link encap:Ethernet  HWaddr 00:17:3f:fa:3c:91  
          inet addr:192.168.1.73  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::217:3fff:fefa:3c91/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:162407 errors:0 dropped:0 overruns:0 frame:0
          TX packets:135062 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:141475254 (141.4 MB)  TX bytes:22445461 (22.4 MB)

wmaster0  Link encap:UNSPEC  HWaddr 00-17-3F-FA-3C-91-00-00-00-00-00-00-00-00-00
-00  
          UP RUNNING  MTU:0  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)

chaz@c1:~$
 
Old 04-11-2010, 07:17 PM   #6
TimothyEBaldwin
Member
 
Registered: Mar 2009
Posts: 249

Rep: Reputation: 27
Is there a firewall? Check the output of iptables-save on Computer 1.
 
Old 04-11-2010, 08:07 PM   #7
cola
Senior Member
 
Registered: Sep 2007
Posts: 1,045

Rep: Reputation: 65
Quote:
Originally Posted by Daravon View Post
I have 3 computers on a local home network. Computer 1 is not receiving incoming anything from other computers on the network, and I don't know why. The regular internet works fine.

Computer 1 can ping and ssh into either 2 or 3. 2 can ping and ssh into 3 and vice versa. But nothing can ping OR ssh into 1. Trying to do so says "no route to host".

All computers are running Ubuntu Karmic. I don't even know where to start figuring out what's causing this, but it's probably something simple
Can you post:
Code:
route -n
 
Old 04-11-2010, 08:47 PM   #8
Daravon
Member
 
Registered: Mar 2006
Posts: 170

Original Poster
Rep: Reputation: 15
Code:
chaz@c1:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     2      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
0.0.0.0         192.168.1.254   0.0.0.0         UG    0      0        0 wlan0
chaz@c1:~$
on one of the other computers:


From one of the other computers:

Code:
chaz@singularity:~/documents/nanowires$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:1e:68:f2:96:c1  
          UP BROADCAST 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:28 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:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:240 (240.0 B)  TX bytes:240 (240.0 B)

wlan0     Link encap:Ethernet  HWaddr 00:23:4d:64:bd:51  
          inet addr:192.168.1.67  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::223:4dff:fe64:bd51/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8276 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5889 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6617932 (6.6 MB)  TX bytes:872427 (872.4 KB)

wmaster0  Link encap:UNSPEC  HWaddr 00-23-4D-64-BD-51-36-34-00-00-00-00-00-00-00-00  
          UP RUNNING  MTU:0  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)

chaz@singularity:~/documents/nanowires$
Code:
chaz@singularity:~/documents/nanowires$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     2      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
0.0.0.0         192.168.1.254   0.0.0.0         UG    0      0        0 wlan0
chaz@singularity:~/documents/nanowires$
Last edited by Daravon; 04-11-2010 at 09:03 PM.
 
  


Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
ssh: connect to host .....No route to host soumyacs Linux - Newbie 5 10-27-2009 10:03 AM
SSH no route to host, also PING problem Z038 Linux - Networking 5 06-22-2008 05:59 PM
No route to host mail4visu Linux - Networking 1 05-18-2006 06:33 AM
ssh: No route to host thanhvn Linux - Software 6 06-30-2005 07:18 AM
No route to host senzoga Linux - Networking 1 07-14-2004 06:03 PM

LinuxQuestions.org > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 08:46 AM.

Contact Us - Advertising Info - Rules - Privacy - LQ Merchandise - Donations - Contributing Member - LQ Sitemap -
Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration