www.digitalpains.net » Networking http://www.digitalpains.net Mon, 28 Feb 2011 11:57:32 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 partner How can I see on my linux box if Multicasting is enabled for my network interface? http://www.digitalpains.net/linux/how-can-i-see-on-my-linux-box-if-multicasting-is-enabled-for-my-network-interface http://www.digitalpains.net/linux/how-can-i-see-on-my-linux-box-if-multicasting-is-enabled-for-my-network-interface#comments Mon, 28 Feb 2011 11:57:32 +0000 ali.sogukpinar http://www.digitalpains.net/?p=647 guidelines
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Using ifconfig command you see if multicasting is enabled for your network interface or not. [ali@lab ~]$ /sbin/ifconfig wlan0 wlan0     Link encap:Ethernet  HWaddr 00:24:D7:38:D5:7C inet addr:172.30.59.189  Bcast:172.30.59.255  Mask:255.255.255.0 inet6 addr: fe80::224:d7ff:fe38:d57c/64 Scope:Link UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 RX packets:761458 errors:0 dropped:0 overruns:0 frame:0 TX packets:282314 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:334033669 (318.5 [...] Related posts:
  1. Ubuntu KVM Virtualization Host: Networking
  2. KVM And Bridge Network Definition On Ubuntu
  3. Disabling the respons to ICMP ECHO requests
]]> http://www.digitalpains.net/linux/how-can-i-see-on-my-linux-box-if-multicasting-is-enabled-for-my-network-interface/feed 0 Ubuntu avahi-daemon creates problem resolving FQDNs ending with .local http://www.digitalpains.net/linux/ubuntu-avahi-daemon-creates-problem-with-resolving-local-domains http://www.digitalpains.net/linux/ubuntu-avahi-daemon-creates-problem-with-resolving-local-domains#comments Tue, 09 Feb 2010 05:22:50 +0000 ali.sogukpinar http://www.digitalpains.net/?p=584 jobsfeedbackparticipatenewsI have started to use .local dns extension for my local network. After changing my complete network configuration I realized that some of my Ubuntu machines can resolve the FQDNs ending with .local (Ex: testhost.digitalpains.local ) correctly. ali@advance17:/home/ali$ ping testhost.digitalpains.local ping: unknown host testhost.digitalpains.local   ali@advance17:/home/ali$ ping testhost PING testhost.feasiblesolutions.local (192.168.7.2) 56(84) bytes of data. [...] Related posts:
  1. Disabling the respons to ICMP ECHO requests
  2. Ubuntu KVM Virtualization Host: Networking
  3. How To Disable IPv6 In Ubuntu 9.10 Karmic Koala
]]> http://www.digitalpains.net/linux/ubuntu-avahi-daemon-creates-problem-with-resolving-local-domains/feed 0 partner Disabling the respons to ICMP ECHO requests http://www.digitalpains.net/linux/disabling-the-respons-to-icmp-echo-requests http://www.digitalpains.net/linux/disabling-the-respons-to-icmp-echo-requests#comments Wed, 06 Jan 2010 11:08:27 +0000 ali.sogukpinar http://www.digitalpains.net/?p=416 guidelines
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Responding to a ping request can not be the part of job definition for a production/critical server. For critical systems It is better not to publish information more than it is absolutely necessary. Disabling response to ICMP ECHO requests is a measure we can easily implement. This behavior is controlled by icmp_echo_ignore_all kernel parameter. By [...] Related posts:
  1. Keeping the old kernel as default after a kernel upgrade
  2. Disabling SELinux on CentOS
  3. How To Disable IPv6 In Ubuntu 9.10 Karmic Koala
]]> http://www.digitalpains.net/linux/disabling-the-respons-to-icmp-echo-requests/feed 0 Setting a Default Gateway for Redhat / CentOS systems? http://www.digitalpains.net/networking/setting-a-default-gateway-for-redhat-centos-systems http://www.digitalpains.net/networking/setting-a-default-gateway-for-redhat-centos-systems#comments Thu, 24 Dec 2009 13:37:00 +0000 ali.sogukpinar http://www.digitalpains.net/?p=384 jobsfeedbackparticipatenewsThere are two possible ways for adding a default gateway. Option 1: You can add a gateway definition to  the /etc/sysconfig/network file. This definition will apply to all network interfaces. Let’s say that your gateway is 192.168.4.1,  then you need to add the following line to /etc/sysconfig/network file. GATEWAY=192.168.4.1 Option 2: You can define a [...] Related posts:
  1. Keeping the old kernel as default after a kernel upgrade
  2. KVM And Bridge Network Definition On Ubuntu
  3. Ubuntu KVM Virtualization Host: Networking
]]> http://www.digitalpains.net/networking/setting-a-default-gateway-for-redhat-centos-systems/feed 0 partner How To Disable IPv6 In Ubuntu 9.10 Karmic Koala http://www.digitalpains.net/linux/how-to-disable-ipv6-in-ubuntu-9-10-karmic-koala http://www.digitalpains.net/linux/how-to-disable-ipv6-in-ubuntu-9-10-karmic-koala#comments Mon, 09 Nov 2009 12:59:03 +0000 ali.sogukpinar http://www.digitalpains.net/?p=326 guidelines
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Ubuntu 9.10 installation by default enables the IPv6 and if you are having performance problems with Firefox it is quite likely that it can be solved by disabling IPv6. You can disable IPv6 at Firefox level or kernel level. For the necessary step here is a nice article you can follow. Related posts:Ideal Virtualization Solution [...] Related posts:
  1. Ideal Virtualization Solution using Ubuntu
  2. Ubuntu KVM Virtualization Host: Networking
  3. Getting started with Nginx
]]> http://www.digitalpains.net/linux/how-to-disable-ipv6-in-ubuntu-9-10-karmic-koala/feed 0 Ubuntu KVM Virtualization Host: Networking http://www.digitalpains.net/networking/ubuntu-kvm-virtualization-host-networking http://www.digitalpains.net/networking/ubuntu-kvm-virtualization-host-networking#comments Fri, 14 Aug 2009 13:27:09 +0000 ali.sogukpinar http://www.digitalpains.net/?p=192 jobsfeedbackparticipatenewsAt our previous article ”Installing Ubuntu KVM Virtualization Host” we have installed a Virtualization Host. Actually standard installation already made some network configurations for us. As you can see below our virtualization host has a bridge network virbr0. This bridge network will be used by our virtual machines and they will receive an IP number from [...] Related posts:
  1. Installing Ubuntu KVM Virtualization Host
  2. KVM And Bridge Network Definition On Ubuntu
  3. Ideal Virtualization Solution using Ubuntu
]]> http://www.digitalpains.net/networking/ubuntu-kvm-virtualization-host-networking/feed 0 partner KVM And Bridge Network Definition On Ubuntu http://www.digitalpains.net/networking/kvm-and-bridge-network-definition-on-ubuntu http://www.digitalpains.net/networking/kvm-and-bridge-network-definition-on-ubuntu#comments Mon, 10 Aug 2009 23:43:50 +0000 ali.sogukpinar http://www.digitalpains.net/?p=146 guidelines
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If you want to access the services on your KVM machines from Internet, it is most likely that you would need a bridge network interface. Let’s see how you can define a bridge network on Ubuntu. First of all we will install the bridge-util package. This package will allow us to use the bridge interface. [...] Related posts:
  1. How do you protect your SOHO (Small Office / Home Office ) network?
]]> http://www.digitalpains.net/networking/kvm-and-bridge-network-definition-on-ubuntu/feed 0 How do you protect your SOHO (Small Office / Home Office ) network? http://www.digitalpains.net/networking/how-do-you-protect-your-soho-small-office-home-office-network http://www.digitalpains.net/networking/how-do-you-protect-your-soho-small-office-home-office-network#comments Sun, 09 Aug 2009 12:08:03 +0000 ali.sogukpinar http://www.digitalpains.net/?p=88 aboutfeedbackWhat kind of protection do you have at your home or small office network? Are you using iptables? windows firewall or firewall of your adsl modem? Now a days having just a firewall is not good enough for your protection. Actually you can also see this from the way open source firewall projects are evolving. [...] Related posts:
  1. Which ports do I need to open up for mailserver ?
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Which ports do I need to open up for mailserver ? http://www.digitalpains.net/linux/mail-server/which-ports-do-i-need-to-open-up-for-mailserver http://www.digitalpains.net/linux/mail-server/which-ports-do-i-need-to-open-up-for-mailserver#comments Wed, 05 Aug 2009 06:39:08 +0000 ali.sogukpinar http://digitalpains.net/ali.sogukpinar/?p=30 http://www.digitalpains.net/linux/mail-server/which-ports-do-i-need-to-open-up-for-mailserver/feed 0