I have iptables configured to DROP every thing except for input chain.
Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT udp -- anywhere anywhere state RELATED,ESTABLISHED

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy DROP)
target prot opt source destination
ACCEPT all -- 192.168.0.0/24 anywhere

Thanks in Advance.
My linux is ubuntu Lucid
RAJ

I have a question, though: Is there any way to allow the ad-hoc network to *not* be hidden to guest computers, without using the CLI?

IP Address: 10.42.43.80
Subnet Mask: 255.255.255.0
Default Gateway: 10.42.43.1

Prior to this, Windows XP was assigning an automatic IP and we all know that wont work!

I hope this helps for those of you having no internet access problems.

All the best!

i am trying to create a mobile website using ruby on rails in ubuntu 10.10 , i run mongrel server locally, can i use the above mentioned method to connect my mobile to the local server running in my laptop….

if there are any other methods to do so…. plz do specify the link…

Ah yes, I remember an issue. Once a friend of mine has brought a win7 notebook to my home, where 3 pc (2 ubuntu and 1 win xp) were connected via ad-hoc. We were not able to connect him to the network. He was always disconnected after 3-5 seconds of connection.

It seems to be a win7 issue. We didn’t solve it.

The ad-hoc network is created on Win-7 64x

I can connect to this from another Win-7 64x laptop/computer. But no other OS can connect.

I have tried Win XP (x32), Win Vista(x32), Ubuntu (x64), Android Gingerbread, Android Honeycomb.

I was wondering if anyone knew of any connection issues with Win-7 x64

Ok, I said to myself, let’s try another linux distro and see if maybe I’ll have a decent ICS with that.
So, I tried another few: Ubuntu, opensuse, Mint… tried the live CD version of each because I ran out of dvds, and besides, live CD-s should also work, right?
What do you know, all I tried was broken, although passed md5 test, burned no prob with lowest speed, when tried to boot from live CD… what did I get? A nice broken lines image desktop where you could understand nothing, like an old tv full of bugs… always I had to press the restart button… a totally f… up and hanging desktop where you can see no button or icon, nothing, just broken lines…

Why don’t they f… test them properly?

It’s not a problem with my configuration, I tried on another computer, same thing. Considering Mandriva runs, I conclude it’s not my problem but theirs’s…

And in Mandriva, a new set of surprises: USB sticks are recognized but treated with “zero used space, zero free space”, you cannot copy anything on them, boot login interface likes to just hang sometimes, maybe it’s reading a newspaper in another dimension…

Tired of all these “minor inconveniences” some pretensed “modern” operating systems do. I’m just the average user. A normal PC, not the worst, not the best. I have my real world life and I don’t want to sit all day in front of my PC trying to fix basic things that should work from the very start in a “modern” operating system…

I want things to be simple, as they should be, nothing more, nothing less.

What a really modern operating system should provide to the user:

(STEPS)

1. First of all, to be able to boot from the disc
2. To install easily and properly
3. To connect to the internet on a direct connection, then be able to share that connection properly with other PC-s
4. To make a LAN, either cabled or wireless, no problem and access shared files
5. To update correctly.
6. To install proprietary drivers when the user wants, considering they own the piece of hardware called “video card”, they have all the right in the world to have access to their proprietary drivers…
7. To have the basic stuff pre-installed: Open Office.org, a nice media player that actually works with subtitles also, and doesn’t beg for codecs all the time, (people, just install VLC or SMPlayer by default and be done with it), to have GIMP for image editing…
8. To have a decent community where people can ask for help and they get a good, detailed response, not a superficial one. Sometimes when people answered my posts, I wandered if they actually read what I asked. Really, carefully read. It’s so easy to spit “generalities” out or to mechanically direct them to a wikipedia link or similar…

Why on earth do such things still happen in 2011? If they did happen 10 years ago, maybe I’d understand, just maybe. But not today…

From my point of view, it is like this: If somebody actually decides to spend time creating and maintaining an operating system, be it commercial or open source, the creator should care about stability issues first of all. They should be that empathic as to test their operating system and the necessary software not on the best machines only, but on the contrary! On the lowest possible PC-s still in use. Try to test it on more machines, with different configurations… Just to try to imagine themselves in the place of a common user, like I said, not the worst, not the best PC…

Also, if you are a software creator and if you accept to waste time and energy and resources on creating and maintaing software, then please try to do a good job. Just release a “stable” release when that release is really, really stable, tested on more different configured machines. Download your own created iso-s and burn them on poor (although still acceptable for everyday use) hardware configurations and try to boot from those!!! If all is fine, if all necessary steps I counted a modern operating system should meet are ok, ONLY THEN release the version! And after that, don’t just release version after version, each few months only for fashion’s sake! Why the need for such versions when there are updates! For god’s sake many of my friends still use Windows XP (a truly modern operating system that keeps things simple even for a child’s use), which was released in 2001 (!!!), and if properly updated, they do all those steps I mentioned with this operating system, Windows XP that is.
From 2001, for humanity’s sake!!! And other “enlightened minds”, come now, after 10 years, (10 years after, hohohooo…) with their “modern” operating systems, which, no matter if they are Vista or Windows 7 or Ubuntu or other crap cannot do the same, cannot provide the basics???… They cannot respect the average PC user that just wants to press a button and get things done, he or she doesn’t need to access all kinds of geeky interfaces and “replace scripts and sh**…

Some people succeeded back there in 2001. They proved it is possible. The average PC user was respected and need not look for “fixes” for the basics of the basics tasks an everyday average user has to do.

Look at our divided world today! Each creates his/hers own version of Linux! Not a bad idea at first, the world is beautiful by diversity but that diversity must be sustained by solid usage facts!

Otherwise, it’s just “art for art’s sake”, just another fashion and propaganda, where in the end the ones that suffer are still the “little people”…
It’s inadmissible.

*sigh* Maybe oneday, somebody will really make something nice, with the average user in mind and not their own publicity…

I really hope for heavens’s sake that this post will be read and interpreted right. Maybe it will make some people think again about some aspects…

Sorry if english isn’t my native language. I hope what I meant it’s clear.

I wish all the best to all good intended. I wish to the rest just what they deserve. Nothing more, nothing less…

I do not know which network manager comes with mandriva, but by autoconnect I mean the option to automatically connect to network even if it is not present.

And one more thing. Connecting to network, encrypting it and getting IP’s and other related stuff are different issues, which should be solved separately.
1) Get unencrypted connection working even with no DHCP
2) Configure the network addresses so the network works as you see fit
3) Encrypt connection

By unencrypted you mean no wep, no other password, just open to anyone to connect to?

Network manager?!? Beats me, it’s the standard one, Mandriva 2010 One comes with… tried to look for any special name it has, no use…

And by autoconnection, do you mean non-static IP adresses, meaning getting ip-s automatically? That’s what I already did…

I’m just tired, for almost 2 days searching for a solution to this….

Try to create an unencrypted connection first. I have not used mandriva distro yet, but it can have the same encryption problem I have described in comments before (what network manager do you use?).
Second, try to set up autoconnection for each Ad-Hoc.

There may be many reasons for the connection not to work.
What does ‘sudo iwconfig wlan0′ say?
Modeset can be wrong (Check for ‘mode:Ad-Hoc’ and not ‘mode:Managed’).
Check key (if it is encrypted).
If connection still fails, try to start the ad-hoc via iwconfig
‘sudo iwconfig wlan0 essid “YourNetwork” mode Ad-Hoc’.
BTW is the adapter working normally with non ad-hoc networks?

I have a Tenda USB wireless N Adapter
I have 1 desktop that gets wired connection [shared, gateway to Internet] and 1 wireless USB adapter that is supposed to listen for ad-hoc connections.

I have Win-7 and Ubuntu 10.10 dual boot.

When Win-7 boots, ad-hoc connection comes up (scheduled task netsh.exe wlan connect name=my_ad_hoc). But Ubuntu 10.10 laptop cannot connect to this ad-hoc network.

When Ubuntu boots, I follow the directions given here, (and Ubuntu’s wiki) but connection never gets created.

If someone knows a reason why please, I’d publicly kiss you on the middle of Golden Gate bridge!

ubuntu 9.10:
click network icon in the upper taskbar
--> create new network
(same as picture above)
networkname ‘adhoc’
security ‘none’
then goto preferences-->network connections-->wireless-->Adhoc-->edit--->1pv4 settings
change it to dhcp

the wifi for mobile works!!