Posted on Apr 30, 2008 under Redhat |
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default-gateway Redhat rhel
The Default Gateway is the IP Address of a router or a routing device to which all the packet to a destination for which the server doesn't have a route will be forwarded to. Most of the servers in any network leave the routing job to the routers meaning there will be a default gateway added to the system and very little (if any) static routes added to it. This makes management much easier.
This procedure should work on Redhat Enterprise Linux, Fedora, Centos.
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Adding the IP Address in Redhat Enterprise Linux can be done by using the netconfig tool or by editing the network-scripts or by using the ifconfig command. While this procedure is tested on Redhat Enterprise Linux, I'm sure it should work on CentOS, Fedora and older Redhat versions.
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Maximum Segment Size (MSS) value advertised by a Server or a System is the preffered size of the segment that it can receive. For an standard packet this is equivalent to the Maximum Transmission unit (MTU) – 40bytes (standard TCP/IP overhead of 40 bytes [20+20]). This is the value that the server advertises and not what we can transmit.
If the MTU is 1500 bytes then the MSS will be 1460 bytes.
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The Maximum Transmission Unit (MTU) can be set/modified in real time on Redhat Enterprise Linux or can be set force the value at boot time.
The MTU in simple terms is the maximum size of a packet that can be sent on a Network Interface card. The default MTU size is 1500 bytes.
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Dnsmasq is an opensource light-weight,easy to configure and administer DNS and a DHCP Server. Dnsmasq is ideally suitable for smaller networks like Small Office and Home Office networks (SOHO) and branch office networks. Dnsmasq can be run on old PC and is very easy to configure and administer. Dnsmasq is seen to support upto 1000 nodes on a network.
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ICMP Redirects Send and Accept are by default enabled on most of the linux flavours including Debian, Ubuntu, Redhat Enterprise Linux, Suse Linux.
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ClarkConnect is an all-in-one Opensource networking suite from Point Clark Networks. It is a full blown security suite on one front with Stateful firewall protection, Intrusion Detection and prevention, Maile Gateway with Antivirus, Anti-spam and Anti-phishing support, proxy & web content filtering, peer to peer connection filtering for web protection while is also a networking suite with IPSec and PPTP support, bandwdith and system monitoring and a server with web-server, Database server support, file & print sharing, mail server, system and mail backup. All built on a cut down redhat linux with a good web interface.
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