Connecting Windows Machine To A Redhat Linux Network

Hi all,
I am brand new to Linux, playing around a bit with different things to see how I can use it in the future. Here is my problem:

I have written a simple program in Ada that works well on windows. It opens a TCP port (20000) and listens for incoming connections. I tried it on my internal network and it works well. I can connect from other windows machines and even from my Linux machine.

Now I moved the program to Linux and compiled it there. It starts ok and then listens for the connections. I can connect to it from that same Linux machine but not from any other machine on my network.

I checked the firewall status on Linux with ufw status and it is disabled. I also tried to add a rule to the iptables with
iptables -A INPUT -p tcp --dport 20000 -j ACCEPT

but still nothing. I can not connect from another machine on my network. I also tried to open a simple telnet connection from a windows machine and that too is blocked. I thought without the firewall all incoming connections would be allowed but obviously something is not working as I thought.

Any help would be greatly appreciated

Hello, My issue is very common but, not able to resolve it.

Issue I am facing with my Linux (RHEL-5 32-bit) machine, where I am not able to connect to internet.

DWR-113 - D-Link Router is configured for 3G dongle (Vodafone India) - This setup is done via WiFi and not using the provided LAN cable from Win7 machine.

Internet is working absolutely fine in case of Wireless but, at same time when LAN cable is used internet is not working. [Able to ping to Router IP i.e. 192.168.0.1)

Similarly, from Linux box, ping to Router IP is working [LAN plugged] but, Internet not working. IP of linux machine: 192.168.0.60

Also, able to get the console connection of Linux from Windows box..[Windows connected to Router via WiFi and Linux connected to Router via LAN cable]

Please suggest how to get rid of this problem so that Internet will work on Linux via LAN cable.

Many Thanks,

I just installed Redhat 7 and try to config the network , add the IP address to network card , but I got the problem.

I modify the file /etc/sysconfig/network-scripts/ifcfg-enp0s3 , the configuration is as below , and then reboot .

DEVICE="enp0s3"
NETBOOT="yes"
HWADDR="08:00:27:15:38:B7"
TYPE="Ethernet"
BOOTPROTO="none"
NAME="enp0s3"
UUID="462f4834-4fe7-43a7-84e7-83b2722e94c1"
ONBOOT="yes"
IPADDR="192.168.1.1"
NETMASK="255.255.255.0"

After reboot , I use "ip addr show" still not shown the ip address , the ip address is still blank , would advise what is wrong ? thanks

I installed Ubuntu 15.04 but with earlier versions this happened too. The problem is, with HTTP or normal downloads like watching youtube the speed is like 20kB/s and with bittorrent I can achieve the full 600kB/s of my network, while in Windows 7 I can download the same files or watch the same videos and have them use the full speed of my network.

Any ideas? what do I have to change so HTTP works fast too? because I think the driver is not the problem since transmission works fine
Thanks

EDIT: And with ethernet cable everything works at full speed

Ok, so I recently installed a Maxtor USB 500Gb external drive. I had to change some permissions but it works like a champ.

I really need more room so I bought a Seagate USB 4tb. I wiped the drive and reformated as ext2. (I am using a really old machine running RedHat). I duplicated my file permissions etc and it works find locally but is nowhere to be found on the network. Completely at a loss. Thank you.

I am writing a C# application that reads all the directories and files on my Ubuntu web site and copies the changed files to my eSata drive on my workstation.

This is the code that reads all files and directories in my www folder.

System.IO.DirectoryInfo file1 = new System.IO.DirectoryInfo(pathA);
IEnumerable<System.IO.FileInfo> list1 = file1.GetFiles("*.*", System.IO.SearchOption.AllDirectories);

This is the error on my workstation accessing the web site after a few minutes.

A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll. Additional information: The specified network name is no longer available. f there is a handler for this exception, the program may be safely continued.

Any ideas on what is causing the network name to not be available. I can see the files on my Windows 7 workstation.

http://www.scsiraidguru.com/CSharp/CopyChange.html

OK this is kinda long, so I will shorten it as much as I can, as to not be long-winded.

My current network at home:
1 - CentOS 7 desktop (server)
1 - Ubuntu 14.04 desktop
1 - Fedora 21 laptop
2 - Windows 7 desktops
some other various windows boxes also that don't get used regularly, but are on the network.

My 2 Linux desktops (which I use as servers, but they really aren't) have shared folders on them, which I share to the network via Samba (CIFS). I use Samba because Linux is smarter than Windows and Windows won't read NFS, so I share them as Samba so all devices can see them.

Generally speaking, if I share the folders on each box as 0777, I have no issues. But lately I have been wanting to implement some better security, so I wanted to SETGID and chown the shared folders from the local machine to a specific group, then change the folders to 2774.

My problem is that I keep getting permissions errors when trying to connect from the other Linux machines, and sometimes the Windows machines also. My main question is: do I CHMOD 2774 the local mount-point before mounting it? Or so I CHMOD 2774 the shared folder on the other server, then mount it locally to a folder whose permissions are different? Or do I CHMOD both of them the same?

basically the uis and gid ownerships change on a local folder when I mount a shared drive to that folder, so when I try to write or sometimes read that local folder, I get permissions errors.

I can provide any additional info needed.

I installed Debian 7.8.0 in text mode. While I configure eth0 through /etc/network/interface it assigned the IP but unable to ping to other machine in the network. I tried /etc/init.d/networking restart but still not working for me.

While I install GUI mode, it allows me configuration done through Network Manager and it pings good to other machine.

I have selected base install during the installation.
How to fix it under text mode?

In simple terms what is the difference between the two and what takes precedence?
In my experience the /etc/resolve.conf file will win out but I have seen when we get network issues that the network interface will use its own configuration file.

Does the interface hold this information somewhere in its cache when it starts up?

Hi Folks,
Installed Mint-mate 17.
It gives message:You are now disconnected" after logging in.
I restart, the network connection comes.
It is not "networking restart", but system restart.

Tried five more times. The behaviour is every time the same.
After booting the system, no network connection. But from there I restart the system, then network connection is on.

Very irritating to always boot it second time to get the network connection up.

The computer is a desktop Dell Optiplex 9010.
On the same computer, Windows 7 runs without any problem.

Any idea how to fix it?

Thanks