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As for the third and any other PC - as long as it's on the same subnet it's allowed to connect after successful authorization.

As to my location - I live in Poland, Jaworzno (already a city, but...

The messages given by NX are self explanatory - file usr/NX/home/nx/.ssh/known_hosts includes old keys used by your ssh daemon. Edit the line, remove your old key and it should be fine. In case it's...

Yes, these images (first one tbh) is just fine. So please edit your /etc/samba/smb.conf file with any text editor (Gnome's gedit is ok). Just run:

sudo gedit /etc/samba/smb.conf

Edit your...

Your smb.conf file is written wrong. Lines that definitely is wrong is:

interfaces = 127.0.0.1/8 192.168.0.0/24

While it should be something like:

interfaces = lo eth0

Then you should...

I'd also recommend rkhunter and chkrootkit. You can also add Lynis to that.

There's also the general rule of securing - keep only what you need (meaning least services required should be running)...

Is your samba server working in the first place? Try doing the following (in terminal - it's easiest for me this way):

netstat -lt

There should be lines reading:

tcp 0 0...

Sorry for the delay, but was buried with some other stuff. I tried it just now - did a little change to PAM (almost as I did write in the first post) so it's configured like that: /etc/pam.d/gdm
...

There are two ways to do the NAT: SNAT or Masquerade. The first one is faster, but should be used when you have a static IP or have an additional IP(s), which are used for translation purposes.
...

I'd go with sshd (for scp capabilities) or vsftpd (instead of proftpd). The first one is easy to configure and you get two in one. On Windows you can download a couple of scp clients (pscp or...

Limiting the speed with iptables is not the best idea I guess. I would recommend limiting the network speed with the ftp server configuration - it should be available (in vsftpd it is with...

Instead of:

auto lo

Make it look like:

auto lo eth0

So both eth0 and lo interfaces will start on system boot. That should fix your problem.

The problem is with your wifi card - your IP address and routing table are fine. Perhaps you're using the wifi card, which doesn't have any Open Source drivers so you'll stuck with ndiswrapper. If...

You need to use a user/password duo which are on Windows XP, not on Ubuntu.

Some routers are also able to be set up with static DNS entries even though they use DHCP for their WAN interface. Give it a try first if it's available in your situation.

Most likely your ethernet card is not set up to be brought "up" on system start. Check the file: /etc/network/interfaces if there's a line:

auto eth0

or something similar. If not - just add...

Sure they can as long as they are security aware. The simplest solution would be using a simple outside proxy (anonymous public one for example). Tor is a multiple-step proxy, so it would be just as...

Not a problem - no need for scripting when it "Just works" with a simple fstab entry. Enjoy you Ubuntu ;)

You have to set up samba first. I don't know if there's a GUI for that (might be), because I'm used to manually changing the configuration file.

Take a look at /etc/samba/smb.conf which is...

You can test your networking with a couple easy steps. Every command I will present here must be written in Terminal (it's installed and available in Ubuntu Apps menu). So the steps with short...

I would install a proxy on your server (squid or safe-squid) and run it transparently for users.

I assume you just have a rule in netfilter (changed by iptables) that just makes a SNAT (Source...

The simplest way would be adding the following line to /etc/fstab:

//192.168.1.4/folder1 /home/user/maxtor cifs defaults,username=user,password=pass 0 1

If that doesn't work, just try mounting...

It's strange though - I thought Windows was checking whether the gateway user provides is in the same subnet as the host IP.

Anyways - when it works, it works. That's what matters in the end.

We're actually not changing the authentication - PAM framework was built for that and according to what lies in /etc/pam.d gdm *is* using it for that.

You don't have to worry about making changes...

It would leave just the simplest tests to do then:

- ping the gateway (the router) after you get your IP address from dhcp,
- traceroute to some Internet address.

The second one should...

Like I stated in my first reply - either netmask or the IP must be changed, otherwise there won't be connection. It's really strange that with the settings you provided you are getting any connection...