Ubuntu 10.04 & Samba error

[capscrew]

Also, I have discovered that I cannot access the server via its hostname under any protocol...so I can't SSH using hostname, only the IP, same with http, or MySQL

This can only mean that you are not running local name services (DNS, etc.) or it is broken.

[verbitan]

This can only mean that you are not running local name services (DNS, etc.) or it is broken.

So how can I fix it?

[capscrew]

So how can I fix it?

I would start by making sure that there is no firewall running that could block the NetBIOS broadcasts. You can check by running Wireshark on the suspected machine.

[Morbius1]

I've always used some variation of the nmap command on linux to see if the remote machine has ports open. For example:

nmap -PN 192.168.0.110

Where 192.168.0.110 is the remote machine's ip address.

This will output the following if the necessary ports are open:

Starting Nmap 5.00 ( http://nmap.org ) at 2010-08-14 12:42 EDT
Interesting ports on 192.168.0.110:
Not shown: 997 closed ports
PORT STATE SERVICE
139/tcp open netbios-ssn
445/tcp open microsoft-ds
631/tcp open ipp

I don't know if this is the best tool to use but it's the one I choose first.

[capscrew]

I've always used some variation of the nmap command on linux to see if the remote machine has ports open. For example:

nmap -PN 192.168.0.110

Where 192.168.0.110 is the remote machine's ip address.

This will output the following if the necessary ports are open:
I don't know if this is the best tool to use but it's the one I choose first.

A good point. The diagnosis can be from either end of the chain.

I feel that seeing actual broadcast packets shows that the ports are open and that broadcasts are being sent. With nmap you can only tell that the ports are open on the host.

[verbitan]

A scan from my laptop shows this...

Interesting ports on 192.168.1.100:
Not shown: 993 closed ports
PORT      STATE SERVICE
22/tcp    open  ssh
25/tcp    open  smtp
139/tcp   open  netbios-ssn
445/tcp   open  microsoft-ds
10000/tcp open  snet-sensor-mgmt
20000/tcp open  unknown
49153/tcp open  unknown

[capscrew]

A scan from my laptop shows this...

Interesting ports on 192.168.1.100:
Not shown: 993 closed ports
PORT      STATE SERVICE
22/tcp    open  ssh
25/tcp    open  smtp
139/tcp   open  netbios-ssn
445/tcp   open  microsoft-ds
10000/tcp open  snet-sensor-mgmt
20000/tcp open  unknown
49153/tcp open  unknown

Does that mean there is no broadcast NetBIOS traffic to UDP ports 137 and 138? To browse you need UDP broadcast traffic.

Edit: See here.

[verbitan]

As far as I can tell yeah...Although I haven't setup any firewall

[verbitan]

I have also tried this which seemed hopeful! But with no luck

[capscrew]

As far as I can tell yeah...Although I haven't setup any firewall

How did you "scan" the ports. Ntop allows you to scan UDP ports. Wireshark will definitely tell you whether you have UDP broadcasts.