linux routing tutorial

In daily use. either server on. There are two addresses, two network card configuration, access to different network segments. Such a situation is a very common phenomenon. However, we need to add an extra to the routing table to determine which packets are sent through the correct gateway, and interface can communicate properly today to introduce you to the Linux operating system how to add routes (for Rhe

Mark, today want to let a REDHAT7 open iptables NAT forwarding function, find a half day.A server: 192.168.30.20/24b Server: 192.168.30.1/24,eth0; 192.168.40.1/24,eth1C Server: 192.168.40.20/24Goal: Allow A to ping and ssh to the C machine. This will need to jump through the B server.Operation Process:1. Turn on the kernel route forwarding parameter on the B serverTemporary entry into force:echo "1" >/proc/sys/net/ipv4/ip_forwardFor permanent entry, you need to modify the sysctl.conf:Net.ipv4.ip

DescriptionHost 1 is the data storage server in the intranet, only one NIC 10.0.0.2;Host 2 is a Web server, there are two network cards, a piece facing the intranet 10.0.0.3, a piece facing the external network 192.168.220.136;(because it is in the context of the virtual machine, the IP address facing the extranet is also a private address, but can be connected to the Internet)Demand:Configuring Host 1 allows host 2 to connect to the Internet via host 1Realize:Step one: Make Host 1 have route fo

Reference: http://blog.csdn.net/u011641885/article/details/495121991. Tools/MaterialsDesktop with wireless card (RT3070 wireless card with USB interface), wired network cardInstalling the Linux operating system, I'm using ubuntu14.042. Methods/StepsA. Check to confirm that the wireless network card supports master modeExecute command: IW listIn the command execution results if you see the following (AP, Ap/vlan), it means that the network card is supp

This article describes how to create a simple routing server using Linux. It mainly includes the setting of several parameters: Ip_forward and Rp_filter.1. Turn on IP forwarding# restart after $ echo "1" >/proc/sys/net/ipv4/ip_forwardor edit/etc/sysctl.conf, make the following changes Net.ipv4.ip_forward = 1# sysctl is used to modify kernel parameters directly during kernel operation $ sysctl-p2. CloseRp_fi

1-linux adding a permanent routeVi/etc/sysconfig/network-scripts/route-eth1address0=192.168.10.0netmask0=255.255.255.0gateway=10.10.10.2542-adding IP and its routesIpLink: Network Interface propertiesAddr: Protocol AddressRoute: RoutingLinkShowIp-s link Show//Details packIP link ShowSetIP link Set dev [up|down]IP link Set eth1 upAddrAddIP addr Add ADDRESS dev DevDelIP addr del ADDRESS dev DevShowIP addr Show Dev dev to PREFIXFlushIP addr Flush Dev dev

Long time no update blog, sin Sin, and found recently some sites are always stealing my open source Chinese blog content, despise! Business: Business needs, a server, dual network cards, need to access both the external network and intranet. In the setup process, colleagues reflect the original use of the intranet address (192.168.1.100) in the setting of the Sisu network address after the bad, as long as the external network network card to stop the intranet can be normal access. In fact, beca

Tags: local disable NIC name sys mod CONF requires netmask technology sharingTo execute a command in command-line mode:This is the host's routing table, the host to access the Internet, you must set the legal IP parameters, including: Ip/netmask/gateway/route/dns IP and host name, etc.Ip/netmask is used to confirm the host network, and to determine whether the target host and the host is in the same network;Gateway is mainly used for communication bet

/etc# lsBgpd.conf.sample isisd.conf.sample ripd.conf.sample zebra.conf.sample bgpd.conf.sample2 ospfd.conf.sample Vtysh.con F.sample# MV Bgpd.conf.sample bgpd.conf# cpisisd.conf.sample Isisd.confother similar ... (MV/CP all Can)put Zebra under the bin and the Sbin Join $ PATH /root/.bash_profilePath= $PATH:/usr/local/zebra/bin/:/usr/local/zebra/sbin/7. running zebra processes and routing processes zebra-dOspfd-dBgpd-d8 , using the script brush config

starts with any　　While read ignore args executes ignore= "any" args= other　　/sbin/route add-$args Add a routed commandNow you can add our own static routes and view the Static-routes format as follows:Any net 192.168.100.0 netmask 255.255.255.0 Dev eth1Any net 0.0.0.0 netmask 0.0.0.0 GW 10.0.2.2 Dev eth0Then restart the network, and the routes are:[Email protected] ~]# route-nkernel IP Routing tabledestination Gateway genmask Flags Metric Ref use Ifa

Http://bbs.chinaunix.net/thread-4090162-1-1.html First, why do you want to do this read kernel route subsystem code, when I understand the relationship between the data structure and control process, is still inappropriate, there is always a "paper on the end of light, I know this thing to preach" feeling. at this time, Systemtap can play a big role. Second, prepare to work Install SYSTEMTAP, kernel, kernel-debuginfo, Kernel-debuginfo-common, etc. Uname-r 2.6.38.6-26.rc1.fc15.i686 Htt

forwarding address does not passContinue Next forwarding Addressif (!key->oif | | key->oif = = nh->nh_oif) match the forwarding address of the output deviceBreak Match success}#ifdef Config_ip_route_multipath multipath Routingif (Nhsel Res->nh_sel = Nhsel; Output forwarding Address numberAtomic_inc (AMP;FI-GT;FIB_CLNTREF);return 0; Successful return}#elseif (Nhsel Atomic_inc (AMP;FI-GT;FIB_CLNTREF);return 0; Successful return}#endifEndfor_nexthops (FI);Res->fi = NULL;return 1; Match failedDefau

-9.]\+'|awk-F'' '{print $}' - } to + Case$1 inch -d|del|Delete) theact=del * Shift $ ;;Panax Notoginsenga|add) -act=Add the Shift + ;; A Esac the +# Do - forIinch[Email protected]; Do $ip=$i $ Echo$i |grep-Q'[a-za-z]\+' -ip=$ (Get_addr $ (Echo${i# #http://}|grep-o ' [a-za-z0-9.-]\+ ')] - Echo "route: $act $ip" the Case$actinch - add)Wuyiroute-n|grep-Q $ip | | the sudoRoute $act-net $ip netmask255.255.255.255GW $GW Metric0 -

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$ex->setflags (amqp_durable);//PersistenceEcho"Exchange Status:".$ex-Declare()."\ n";//Create a queue $q=NewAmqpqueue ($channel);$q->setname ($q _name);$q->setflags (amqp_durable);//PersistenceEcho"Message total:".$q-Declare()."\ n";//Bind switches and queues , and specify routing keysEcho' Queue Bind: '.$q->bind ($e _name,$k _route)."\ n";//Blocking mode to receive messagesEcho"message:\n"; while(True){$q->consume (' ProcessMessage ');//$q->consume (

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