Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 4 docx
designing and implementing linux firewalls and qos using netfilter iproute2 nat and 17 - filter
... 40 3.2 .4 The sx_sunlock and sx_xunlock Functions 41 3.3 Hiding a Running Process 41 3.3.1 The proc Structure 41 3.3.2 The allproc List 42 3.3.3 Example 43 3 .4 Hiding a Running Process Redux 46 3 .4. 1 ... Example 43 3 .4 Hiding a Running Process Redux 46 3 .4. 1 The hashinit Function 47 3 .4. 2 pidhashtbl 47 3 .4. 3 The pfind Function 48 3 .4. 4 Example 48 3.5 Hiding with DKOM 513.6 Hiding an Open TCP-based ... 978-1-59327- 142 -8 ISBN-10: 1-59327- 142 -5 1. FreeBSD. 2. Free computer software. 3. Operating systems (Computers) I. Title. QA76.76.O63K 649 2007 005.3 dc22 2007007 644 No Starch Press and the...
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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 netlter, iproute2, NAT, and L7-lterLearn how to secure your system and implement QoS using real-world scenarios for networks ... Threats 41 Layer 1 Security Threats 42 Layer 2 Security Threats 42 MAC Attacks 42 DHCP Attacks 43 ARP Attacks 45 STP and VLAN-Related Attacks 45 Layer 3 Security Threats 46 Packet Snifng 47 IP ... 230City-1 231City-2 232City-3 and City -4 2 34 The Core Network Conguration 235Core-2 237Core-1, Core-3, and Core -4 240 Security Threats 242 Core Routers INPUT Firewalls 242 Protecting the Networks...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 2 pps
... 255.255.255.252 4 /29 255.255.255. 248 8/28 255.255.255. 240 16/27 255.255.255.2 24 32/26 255.255.255.192 64 /25 255.255.255.128 128/ 24 255.255.255.0 256/23 255.255.2 54. 0 512/22 255.255.252.0 10 24 Chapter ... packet header. The 4- bit version eld contains the number 4 if it is an IPv4 packet, and 6 if it is an IPv6 packet. However, this eld is not used to distinguish between IPv4 and IPv6 packets. ... networks directly from AS 1, and can also receive them from AS 2 and AS 4. The router nds the best path to AS 1 networks and sends packets to those networks on that path, and if that link fails,...
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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 ... 1000Kbit ceil 1000Kbit burst 2 849 b cburst 2 849 b Sent 2 94 bytes 3 pkts (dropped 0, overlimits 0) rate 24bit lended: 3 borrowed: 0 giants: 0 tokens: 18 048 ctokens: 18 048 There is no catch in all ... transformed into a very powerful and very cheap dedicated QoS machine.For that, QoS support must be congured in the Linux kernel (CONFIG_NET _QOS= "Y" and CONFIG_NET_SCHED="Y").Chapter...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 5 pps
... 0-beta/for_older_kernels/kernel-2.6.11-2.6.12-layer7-1 .4. patchpatching file include /linux/ netfilter_ipv4/ip_conntrack.hpatching file include /linux/ netfilter_ipv4/ipt_layer7.hpatching file net/ipv4/netfilter/Kconfigpatching file net/ipv4/netfilter/Makefilepatching ... net/ipv4/netfilter/ipt_layer7.cpatching file net/ipv4/netfilter/regexp/regexp.cpatching file net/ipv4/netfilter/regexp/regexp.hpatching file net/ipv4/netfilter/regexp/regmagic.hpatching file net/ipv4/netfilter/regexp/regsub.crouter:/usr/src /linux- 2.6.12.5#Next, ... file net/ipv4/netfilter/ip_conntrack_core.cpatching file net/ipv4/netfilter/ip_conntrack_standalone.cHunk #1 succeeded at 189 with fuzz 2 (offset 37 lines).patching file net/ipv4/netfilter/ipt_layer7.cpatching...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 6 pps
... with random data in them!^[\xe3\xc5\xe5\xd4].?.?.?.?([\x01\x02\x05\x 14\ x15\x16\x18\x19\x1a\x1b\x1c\x20\x21\x32\x33\x 34\ x35\x36\x38\x40\x41\x42\x43\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50\x51\x52\x53\x 54\ x55\x56\x57\x58\x5b\x5c\x60\x81\x82\x90\x91\x93\x96\x97\x98\x99\x9a\x9b\x9c\x9e\xa0\xa1\xa2\xa3\xa4]|\x59 ... opened TCP ports 139 and 44 5 and UDP ports 137 and 138.We know that NetBIOS uses the famous trio of ports 137-138-139, so 44 5 TCP looks a little strange. It was opened by Samba and is the port ... 255.255.255.2 24 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 255.255.255.2 24 and default gateway 1.1.2.65.Sales and accounting departments...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 7 ppt
... 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 the private IP addresses 192.168.3.1 and 192.168 .4. 1.MSSQL B and C must have ... 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 ... POSTROUTING -s $PREFIX.0/ 24 –d 192.168.2.0/ 24 -j ACCEPT$IPT -t nat -A POSTROUTING -s $PREFIX.0/ 24 –d 192.168.3.0/ 24 -j ACCEPT$IPT -t nat -A POSTROUTING -s $PREFIX.0/ 24 –d 192.168 .4. 0/ 24 -j ACCEPT$IPT...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 8 pps
... between HQ and this location#we allow a minimum of 1 /4 of total bandwidth for traffic with HQlet I=$BW /4 $AC 1:1 classid 1 :40 htb rate ${I}kbit ceil ${BW}kbit prio 3$AQ 1 :40 handle 40 0: pfifo ... handle 4 fw classid 1 :40 #Internet Traffic for users#we allow a minimum of 1 /4 of total bandwidth for internet traffic$AC 1:1 classid 1:50 htb rate ${I}kbit ceil ${BW}kbit prio 4 $AQ 1:50 handle ... addresses 1.2.3.0/ 24, and one to match source IP addresses 192.168.1.0/ 24. The second way would be to mark the trafc from 192.168.1.0/ 24 and 1.2.3.0/ 24 with the same value and add a single class...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 9 pptx
... connects City-3 and City -4. City-3 and City -4 City-3 is located at about 40 km from City-2 and City -4 is located at 20km from City-3 (60km from City-2).They are smaller cities and both have ber ... from Core-1 and Core -4, and a multi-hop BGP connection between Core-1 and Core -4. On Core-1, we will place a static route to Core -4 through 10.10.2.1:route add 10.10.2.6 gw 10.10.2.1 and congure ... eBGP peer used for backup, and two iBGP peers (Core-1 and Core -4) . Since the core link from Core-3 to Core -4 has the largest bandwidth of all core links to Core -4, this link normally carries...
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Designing and Implementing Linux Firewalls and QoS using netfilter, iproute2, NAT, and filter phần 10 doc
... 61Ssecurity threatsARP attacks 45 DHCP attacks 43 ICMP attacks 48 IP spoong 47 MAC attack 42 MIM attack 41 OSI layer 1 42 OSI layer 2 42 -46 OSI layer 3 46 OSI layer 4 49OSI layer 5 51OSI layer ... 242 Core Routers INPUT Firewalls 242 Distributed Denial of Service attacks 245 , 246 ood-detection tool 246 - 248 , 250networks behind core routers, protecting 243 , 244 script, core router 242 Simple ... 252-2 54 layer 2, security threatsARP attacks 45 DHCP attacks 43 MAC attacks 42 STP attacks 46 VLAN attacks 45 layer 3, security threatsabout 46 ICMP attacks 48 IP spoong 47 packet snifng 47 routing...
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