These days I experiencing slow internet connection. I have an idea
1. Go tracert the 8.8.8.8
2. Watch for the output of step 1, and then realize a strange IP address introduced to the output of the tracert. I never look/see that hop address before.

How to embed a SWF file in a html page?

<object width="100" height="100">
    <param name="movie" value="file.swf">
    <embed src="file.swf" width="100" height="100">
    </embed>
</object>

What is CDATA in HTML?

Since it is useful to be able to use less-than signs (<) and ampersands (&) in web page scripts, and to a lesser extent styles, without having to remember to escape them, it is common to use CDATA markers around the text of inline and elements in XHTML documents. But so that the document can also be parsed by HTML parsers, which do not recognise the CDATA markers, the CDATA markers are usually commented-out, as in this JavaScript example:

<script type="text/javascript">
//<![CDATA[
document.write("<");
//]]>
</script>

Soal-soalJaringan IP

1. A, 1. Kalau dibalik jadi? 1, A.

2. A, 1, 2. Kalau yang bisa dibalik hanya 2 karakter saja jadi apa? 1, A, 2.

2. Kalau nomor kamar dari 1 - 9. Berapa jumlah kamar? 10

3. Kalau nomor kamar dari 0 - 9. Berapa jumlah kamar? 10 + 1 = 11

4. Kalau nomor kamar dari 1 - 19. Berapa jumlah kamar? 20!

5. Kalau nomor kamar dari 0 - 19. Berapa jumlah kamar? 21!

Guide membuat access-list (ACL)

1. Deny dulu baru permit. Denying the network traffic from accessing another network comes before permitting all other traffic.
2. Selalu tempatkan access-list standard dekat ke network/host yang mau di deny
3. Selalu tempatkan/urutkan most specific ke least specific.
4. Kalau tidak ada mention port, mending pakai access-list standard
5. Kalau ada mention port, pakai access-list extended
6. Numbered atau named terserah, kalau yang lebih mudah di edit named.
7. Untuk nge-view atau examine access-list jangan pakai show run tapi lebih enak pakai show access-list atau show ip access-list

Contoh:
• For the 192.168.10.0/24 network, block Telnet access to all locations and TFTP access to the corporate Web/TFTP server at 192.168.20.254. All other access is allowed.
• For the192.168.11.0/24 network, allow TFTP access and web access to the corporate Web/TFTP server at 192.168.20.254. Block all other traffic from the 192.168.11.0/24 network to the 192.168.20.0/24 network. All other access is allowed.

Terjemahan:

• Untuk network 192.168.10.0/24, blok akses Telnet ke semua lokasi dan akses TFTP ke corporate Web/TFTP server di 192.168.20.254. Semua akses lain diperbolehkan.
• Untuk network 192.168.11.0/24, izinkan/bolehkan akses TFTP dan akses web ke corporate Web/TFTP server. Blok semua trafik lain dari 192.168.11.0/24 (network ini) ke network 192.168.20.0/24. Semua akses lain diperbolehkan.

Dengan bahasa lain / yang lebih sederhana:
Network 192.168.10.0/24 bisa akses ke semua kecuali telnet ke semua lokasi dan akses TFTP ke corporate Web/TFTP server.
Network 192.168.11.0/24

Penjabaran:
For 192.168.10.0/24
Block:

• Telnet access to all locations
• TFTP access to the corporate Web/TFTP server 192.168.20.254

Permit

• All other access (Mail, Database, Ping/ICMP)

For 192.168.11.0/24

Block:

• Block all other traffic from the 192.168.11.0/24 to the 192.168.20.0/24 network

Permit:

• TFTP access and web access to the corporate Web/TFTP server at 192.168.20.254

Access-list

R1(config)#access-list 100 

Acitivty: Mengamankan jaringan dengan menggunakan ACL

Activity 1

1. An access Control List (ACL) is a router configuration script that controls whether a router will ____ or ___ packets based on criteria found in the packet header.

2. ACL are often used in ___ routers that are positioned between your internal network and external network.

3. A router with three active interface and two network protocols (IP and IPX) can have as many as ___ active ACLs.

4. For inbound ACLs, incoming packets are processed ___ they are routed to an outbound interface.

5. For outbound ACLs, incoming packets are processed ___ they are routed to an outbound interface.

6. At the end of every access-list is an implied ___ all traffic criteria statement. Therefore, if a packet does not match any of your criteria statements, the packet will be ___

permit, six, before, blocked, allowed, while, deny, firewall, after, three, twelve.

Answer:
1. Permit, Deny
2. Firewall
3. Twelve
4. Before
5. After
6. Deny, Blocked

Activity 2
1. Can filter traffic based on source IP address: Standard dan Extended
2. Can filter traffic based on destination IP address: hanya Extended saja
3. Can filter traffic based on protocol type: hany Extended saja
4. Uses number 1 - 99: Standard
5. Uses number 100 - 199: Extended
6. Uses number 1300 - 1999: Standard
7. Can use a name insted of a number: Standard and Extended

Activity 3
Network policy #1: Use a standard ACL to stop the 192.168.1.0/24 network from accessing the Internet via ISP
Network policy #2: Use an extended ACL to stop the 192.168.30.0/24 network from accessing the Web/TFTP server.

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