Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 6 pps

designing and implementing linux firewalls and qos using netfilter iproute2 nat and 17 - filter

... (Computers) I. Title. QA 76. 76. O63K649 2007 005.3 dc22 200700 764 4No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Other product and company names mentioned ... understand pointers) as well as x 86 Assembly (AT&T Syntax). You’ll also need to have a decent understanding of operating system theory (i.e., you know the difference between a process and ... 46 3.4.1 The hashinit Function 473.4.2 pidhashtbl 473.4.3 The pfind Function 483.4.4 Example 483.5 Hiding with DKOM 513 .6 Hiding an Open TCP-based Port 523 .6. 1 The inpcb Structure 523 .6. 2...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 1 pot

... (UDP)•• Designing and Implementing Linux Firewalls and QoS using netlter, iproute2, NAT, and L7-lterLearn how to secure your system and implement QoS using real-world scenarios for networks ... the Firewall Script 161 QoS Bandwidth Allocation 163 The QoS Script 166 Summary 168 Chapter 7: Medium Networks Case Studies 169 Example 1: A Company with Remote Locations 169 The Network 170Building ... (OpenSSL) 56 Protect Running Services—General Discussion 56 Summary 62 Chapter 3: Prerequisites: netlter and iproute2 63 netlter/iptables 63 Iptables — Operations 67 Filtering Specications 68 Target...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 2 pps

... 255.255.255.192, and subnets 192. 168 .1.0, 192. 168 .1 .64 , 192. 168 .1.128, and 192. 168 .1.255.The trick for subneting class C networks is to subtract the number of hosts that you want in that subnet from 2 56 and ... that class C, and so, each subnet will have (2 56 / 4 =) 64 IP addresses (only 62 usable for devices). The last byte (in decimal) for the subnet mask will be (2 56 – 64 =) 192, and so, I get ... 8 bits 24 bits 1-1 26 Class B 16 bits 16 bits 128-191Class C 24 bits 8 bits 192-2231 26 class A networks with up to 16, 777,214 hosts each 65 ,000 class B networks with up to 65 ,534 hosts eachOver...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 4 docx

... expensive dedicated QoS machines. Using Linux, you can implement QoS in all the ways any dedicated QoS machine can and even more. Also, one can make a bridge using a good PC running Linux that can ... might want to use your Linux box to do routing without NAT, and conntrack would slow things down in that case.IP_NF_NAT or Full NAT allows you to do SNAT, DNAT, MASQ, and redirects. You must ... state, and timeouts. Here are some example entries in /proc/net/ip_conntrack:tcp 6 262 872 ESTABLISHED src=2.2.2.2 dst=1.1.1.1 sport=80 dport =65 000 [UNREPLIED] src=192. 168 .1.2 dst=2.2.2.2 sport =65 000...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 5 pps

... IPv4:CLUSTERIP IPv4:layer7 IPv4:recent IPv6:ah IPv6:esp IPv6:frag IPv6:ipv6header IPv6:hbh IPv6:dst IPv6:rt Now we will install iptables using the make install command and also specifying the path to ... IP address to 192. 168 .1 .60 if the packet is destined for 192. 168 .20 .60 . Linux Router 2 does this and then looks up 192. 168 .1 .60 in its routing table and sees that 192. 168 .1 .60 is directly connected ... the IP address 192. 168 .1 .60 to 192. 168 .20 .60 if the destination IP address is 192. 168 .10 .60 .Step 4iptables –t nat –A PREROUTING –d 192. 168 .20 .60 –j DNAT –-to 192. 168 .1 .60 This will create...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 6 pps

... dport 61 1 46 -j MANAGEMENTAlso, for the web and mail server, we will run SSH on port 61 1 46 TCP, and we need to apply the rules in the MANAGEMENT chain to packets destined to 1.1.2.2 port 61 1 46 ... 255.255.255.224 on Eth2 of our Linux router, and statically assign to them IP addresses from 1.1.2 .66 to 1.1.2.94 using netmask 255.255.255.224 and default gateway 1.1.2 .65 .Sales and accounting departments ... device ports 65 00 and 67 00 UDP for hosting games$IPT –t nat -A PREROUTING -p udp dport 65 00 -j DNAT to 192. 168 .1.200$IPT –t nat -A PREROUTING -p udp dport 67 00 -j DNAT to 192. 168 .1.200#Deny...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 7 ppt

... 192. 168 .3.1 and 192. 168 .4.1.MSSQL B and C must have static private IP addresses—192. 168 .3.2 and 192. 168 .4.2.The IP ATAs must have static private IP addresses—192. 168 .3.3 and 192. 168 .3.4.The ... destinationMARK all 0.0.0.0/0 192. 168 .4.3 MARK set 0x1MARK all 192. 168 .1.2 192. 168 .4.2 MARK set 0x2MARK all 1.1.4.1 192. 168 .4.2 MARK set 0x3MARK all 192. 168 .1.0/24 192. 168 .4.0/24 MARK set 0x4•••••Medium ... are: 2 Mbps for Store B and 1Mbps for Store C.We decided to use the private class C 192. 168 .3.0/24 for Store B and 192. 168 .4.0/24 for Store C.We set the Linux routers B and C LAN interface with...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 8 pps

... tcp 192. 168 .1.0/24 0.0.0.0/0 tcp dpt:80ACCEPT tcp 1.2.3. 16/ 28 0.0.0.0/0 tcp dpt:80ACCEPT tcp 0.0.0.0/0 0.0.0.0/0 tcp dpt :66 69ACCEPT tcp 1.2.3. 16/ 28 0.0.0.0/0 tcp dpt:22ACCEPT tcp 192. 168 .1.0/24 ... Rate, and it's the minimum guaranteed bandwidth, and MIR means Maximum Information Rate, and it's the maximum bandwidth a user can get. We will show in this example how to make bandwidth ... rewalls. Designing and Implementing the Firewalls Due to the fact that all the servers run Linux, they will all have their own rewall. However, the main rewall is on the core router, and so...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 9 pptx

... 66 66 for ltering IP addresses. In case of a ood attack to one of our IP addresses (in this case 1.1.48.1), we advertise the IP address to the provider setting the community to 65 002 :66 66 ... 1.1. 96. 0/20 exact-matchaccess-list ournetworks permit 1.1. 168 .0/22 exact-match!route-map provider-3-out permit 10 match ip address ournetworks set as-path prepend 65 000 65 000 65 000Core-1 and ... advanced-vty!router bgp 65 000 neighbor 1.1.1.190 remote-as 65 000 neighbor 1.1.1.22 remote-as 65 000 neighbor 1.3.1.89 remote-as 65 002 neighbor 1.3.2.1 remote-as 65 002! address-family ipv4!...

Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 10 doc

... allocationabout 150, 163 Linux as router 163 , 164 QoS conguration, verifying 152, 167 QoS script 151, 152, 166 , 167 SOHO applications 150, 151 QoS for small ISP networkabout 214bandwidth 215bandwidth ... table 64 features 63 front-end 63 iptables 63 mangle modules 64 mangle tables 64 NAT 64 packets, ow 65 , 66 working 64 , 66 Network Address and Port Translation. See PATNetwork Address Translation. ... wireless server 2 16 default class 2 16 interfaces, core router 220 QoS on core router 220, 223 QoS on intranet server 218-220 QoS on wireless server 2 16 QoS script, core router 221, 223 QoS script,...

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