Can ssh only one way

English Network/Internet
1

I am trying to get ssh working on a local network. I have 3 boxes on it XP, pclinux and Opensuse 10.3. I have cygwin installed on the xp. I can ssh the xp and the pclinux from each other. I can ssh the opensuse from the xp and the pclinux. I can not ssh either the xp or the pclinux from the opensuse. I get ssh: connect to host 192.168.1.113 port 22: No route to host when trying to connect to the pclinux. It does nothing when I ssh the xp box. I have tried with and without the firewall on. I am fairly new to Linux and really new to ssh. I appreciate any help.

thanks

2

No route to host means your network setting are incorrect.

Make sure your default gateway and subnet settings are correct.

3

Possibly your network settings are wrong. What are you using to assign addresses, a home router? What is the output of:

ip addr
route -n
cat /etc/resolv.conf
4

I they are all set to dhcp from a router. The pclinux is a laptop on wireless.

ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,NOTRAILERS,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:1d:92:b0:b9:31 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.115/24 brd 192.168.1.255 scope global eth0

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 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
cat /etc/resolv.conf

BEGIN INFO

Modified_by: dhcpcd

Backup: /etc/resolv.conf.saved.by.dhcpcd.eth0

Process: dhcpcd

Process_id: 2990

Script: /sbin/modify_resolvconf

Saveto:

Info: This is a temporary resolv.conf created by service dhcpcd.

The previous file has been saved and will be restored later.

If you don’t like your resolv.conf to be changed, you

can set MODIFY_{RESOLV,NAMED}_CONF_DYNAMICALLY=no. This

variables are placed in /etc/sysconfig/network/config.

You can also configure service dhcpcd not to modify it.

If you don’t like dhcpcd to change your nameserver

settings

then either set DHCLIENT_MODIFY_RESOLV_CONF=no

in /etc/sysconfig/network/dhcp, or

set MODIFY_RESOLV_CONF_DYNAMICALLY=no in

/etc/sysconfig/network/config or (manually) use dhcpcd

with -R. If you only want to keep your searchlist, set

DHCLIENT_KEEP_SEARCHLIST=yes in /etc/sysconfig/network/dhcp or

(manually) use the -K option.

END INFO

domain Palmer

Thanks for the replies

5

Well you don’t have a nameserver in /etc/resolv.conf. Either the router didn’t send that info, or more likely, you set it up in YaST > Network devices not to use the nameserver that is specified in the DHCP lease. Fix that.

So you won’t be able find a machine by name, but if you ssh to the IP address, it will probably respond.

6

I am using ip address to connect.

ssh username@ip address

I hit enter and it just sets there not giving me nothing now.

When I do the same thing from the other boxes to Opensuse it connects right up.

7

Not getting any response means that the server may be blocking incoming traffic on that port. Windows has a firewall, did you open port 22?

In contrast, if you get no such host, you have a name resolution problem or routing problem. And if you get a reject, the machine is there but not accepting connections. Playing deaf usually means the packets are being blocked.

8

Thanks for all of your advice. I think that I might have solved it. I got the pclinux to work which is on wireless. The xp box is on a client bridge router so I think that the router may be stopping it.
I dont have time to try now but will later. Hope that is the problem.

thanks

9

Solved: port 22 was open on the xp machine but only allowing the pclinux thru.

Thanks for all the replies

Cliff