Fedora Networking :: Bring The External Device (192.168.1.9) To The Set Of LAN Devices That Receive LAN Broadcasts?
Aug 18, 2009
i have an isolated LAN (no connection to outside) with 3 fedora boxes. Suppose one of the boxes has an IP device connected to the serial port. We use SLIP and slattach to configure it and we can ping the device from every fedora boxes. Is it possible to bring the external device (192.168.1.9) to the set of LAN devices that receive LAN broadcasts?
box 1: 192.168.1.1
box 2: 192.168.1.2
box 3: 192.168.1.3.
It runs slattach and uses 192.168.1.9 to address serial connected ip device. I set up this scenario and the external device is ping(ed) with success but if I build a socket udp program that sends a broadcast to the LAN all the fedora boxes receive it except the external serial device. Why.
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May 29, 2011
I just upgraded to 15 and was wondering if it was possible to specify which devices to prioritize a route through. I have my machine, a laptop, connected to my family's router for an internet connection and a wired connection to a personal router for a faster and private connection between my other two computers and a network storage device. Whenever the laptop is connected to my personal router everything goes through it and it can't connect to any external web sites. But when I unplug it and go only on my family's wireless everything is fine, except I can't connect to the storage device since it has no external connections.
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Jan 14, 2010
I have been running an email server on a Red Hat 9 system for 5 years, and wanting to upgrade it to the latest Fedora OS. A few days ago it crashed. The server is running Fedora 11 (up-to-date). Clients are Fedora 11 and Windows XP machines using Thunderbird for accessing email. The server is running Postfix and Dovecot. Within my local network I can send and receive emails. I can also send email to addresses outside of my local network. The only problem is that I cannot receive any email from outside the local network. I cannot think of anything aside from my firewall (iptables) or postfix config that could be causing the problem.
Below are my iptables file, and the postfix main.cf changes that I have made.
Iptables (the same file I was using on Red Hat version 9 with one minor deprecated syntax changed):
*nat
:PREROUTING ACCEPT [22:1894]
:POSTROUTING ACCEPT [14:840]
:OUTPUT ACCEPT [17:1356]
-A POSTROUTING -o eth0 -j MASQUERADE
COMMIT
*filter .....
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Oct 8, 2010
I've a server in an European data center, My server is receiving a lot of UDP Netbios Boradcast packets (I've sniffed them via tcpdump )
I've block the sender IP via iptables but tcpdump again shows the packets that are receiving.
an example tcpdump output 16:35:25.829592 IP SENDER-IP.netbios-ns > MY-SERVER-IP.255.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
How can I block those broadcast packets?
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Jul 14, 2009
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I am currently trying to compile mpeg4ip on F12 in order to do live broadcasts using Mp4live (a real-time encoding tool which mpeg4ip provides). The idea is to use mpeg4ip as broadcast software for Darwin Streaming Server which i am already running (v. 6.0.3 ) and streaming pre-recorded media. So i use the command
Code:
./bootstrap
which eventually tells me that
Code:
Mp4live encoder report:
ffmpeg encoder is installed
xvid encoder is installed
*** x264 encoder is not installed
[Code]....
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Jun 23, 2009
If I restart the network service, not all interfaces come back up. Is this expected behaviour or does something need a kick?
Code:
[root@@aspire3500 ~]$ service network restart
Shutting down interface eth0: [ OK ]
Shutting down interface wlan0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
[root@@aspire3500 ~]$
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Sep 19, 2010
I can use nmcli to bring down and back up again my wireless connections but it doesn't seem to work with my "Mobile Broadband" connections. It works to bring down my mobile internet with :
Code:
nmcli con down id OptusInet
But when I try to bring it up again with :
Code:
nmcli con down id OptusInet
It says :
Code:
Error: No suitable device found: no device found for connection 'OptusInet'.
Even when I add the device with :
Code:
nmcli con up id "OptusInet" iface ttyUSB0
It says :
Code:
Error: No suitable device found: device 'ttyUSB0' not compatible with connection 'OptusInet'.
Am I doing something wrong?? Any ideas anyone??
Device info for my mobile device :
Code:
[my_prompt]$ nmcli -p dev list .....
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Jun 13, 2010
I have just set up an FC 13 box for a small network application. At the core, the application is supposed to receive some data over a multicast on my local network. However, for some reason, I am not being able to receive any multicast data on this machine. Other machines, on the same network (connected on the same layer 2 switch) are receiving the multicast just fine. I have tried the following things:
1. ensure that I am joining the multicast on the correct interface: the machine has only one ethernet card. Also, after starting my application, I use netstat -g to check for group membership. The multicast subscription shows up fine.
2. ensure there is no error in the program: the program works fine on my person linux machine
3. ensure that the multicast is actually available: it is available on all other local machines. I also wrote my own small broadcaster. data from this broadcaster (running on the same box) is available to other machines but not to my own listener program.
4. no firewall/filtering settings on the layer2 switch
5. TTL setting on the broadcast: have tried changing it from 1 through 5 with no effect. Note that even if the broadcast is coming from the same machine, my machine does not pick it up while other machines on the network do so.
I suspect this has to do with some settings on the network card itself. Below is the output of /sbin/ifconfig on the card:
eth0 Link encap:Ethernet HWaddr 00:08:A1:67:BBA
inet addr:192.200.20.32 Bcast:192.200.20.255 Mask:255.255.255.0
inet6 addr: fe80::208:a1ff:fe67:bbca/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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(AMD64 running stable Jaunty 9.10 fully updated)
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May 20, 2009
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I'd really prefer not to go down the ndiswrapper route.
Firstly, I can see the PCI card and the driver it is using :
Code:
[J@gx260-f10 ~]$ lspci -k
...
...
01:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller (rev 20)
[Code]....
the PC just hangs for ever. No mouse movement, ctrl-alt-del, nothing.
I have downloaded a Linux driver from Realtek but it will not compile. I have the latest kernel-devel, headers, and gcc. I can post compiler errors if anybody would like. They're all apparently to do with missing parameters.
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Code:
/dev/disk/by-id/ata-WDC_WD5000BEKT-80KA9T0_WD-WXA1A8011853-part5 swap swap defaults 0 0
[code]....
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Feb 24, 2010
Find external and internal devices attached to a system in Linux
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By internal i mean devices attached internally. For Example, SATA Harddisk etc.
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2. how to make an bluetooth serial port service on Fedora 12?
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Jul 28, 2010
What I am trying to do is the following: I have many IBM MT-M 6223 towers (Intel Xeon processor) that need to run a certain Fedora 9 configuration. It is working on one box, now it needs to be replicated on all of the others. What is being done is the working box is cloned, and then that image is loaded on all of the others.These boxes have 5 total Ethernet devices. There is one on-board port, and there are two 2-port expansion cards for a total of 5.
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Now for this new problem.... Part of the configuration across all these machines is that only eth3 should have an IP address. It is a static IP address set through the /etc/sysconfig/network-scripts/ifcfg-eth3 file. All of the other devices must NOT have any IP address. They are either not used or used only for raw Ethernet.After clearing out /etc/udev/rules.d/70-persistent-net-config, /etc/sysconfig/network-scripts/ifcfg-eth3 was edited to give the new box its own unique static IP address before rebooting.Sample ifcfg-eth3 file:
Code:
DEVICE=eth3
BOOTPROTO=static
[code]....
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[Code]...
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