Tài liệu Haking live_ New Version Available pptx

[...]... servers): news1.example.com, news2.example.com and news3 example.com Let us also assume, that the user has sent their message to the news1.example.com server to the alt.test group which is also available on all the remaining servers After having received the user's message, the news1 example.com server connects to the news2.example.com and news3.example.com servers and informs them that it has received a new. .. Usenet as the MessageID) The news2.example.com server informs news1.example.com that it does not yet have that mes- www.hakin9.org sage and requests that it will be sent The news3.example.com server does the same After a moment, the message is available on all three servers But news2.example.com and news3.example.com are also connected to each other This means, that after news2.example.com has received... 220 0 article Path: news1.example.com!newsserver.example.com!not-for-mail From: nobody@nowhere.com Newsgroups: alt.test Subject: test Date: Fri, 4 Jun 2004 09:30:34 +0000 (UTC) Organization: Example Server Lines: 2 Message-ID: NNTP-Posting-Host: our.IP.address X-Trace: news1.example.com 1086341434 6878 our.IP.address... steps Here is an example: $ telnet news2.example.com 119 < 200 news2.example.com InterNetNews NNRP server INN 2.4.1 ready (posting ok) > AUTHINFO user User < 381 PASS required > AUTHINFO pass Password < 281 Ok Let us see what will happen if we try to download and send messages to a server if we have no access: $ telnet news3.example.com 119 < 201 news3.example.com InterNetNews NNRP server INN 2.3.2 ready... a new line – this ends the message body Let us make sure that our message got to the server by providing its MessageID: hakin9 2/2005 Usenet abuse Listing 1 Our first message > < > > > > > > > > < POST 340 Ok, recommended ID From: nobody@nowhere.com Newsgroups: alt.test Subject: test Body: 240 Article posted ARTICLE ... will not need any additional tools to 16 $ telnet news1.example.com 119 < 200 news1.example.com InterNetNews NNRP server INN 2.3.4 ready (posting ok) It is easy to guess that the posting ok information tells us that we are allowed to post messages on this server At the same time, we found out that the software with which we will communicate is INN version 2.3.4 (most Usenet servers use INN software)... open proxy hakin9 2/2005 Listing 3 Deleting a message > < > > > > > > < POST 340 Ok, recommended ID From: somebody@somewhere.net Newsgroups: alt.test Subject: delete the test Control: cancel 240 Article posted deleted A sample cancellation is presented in Listing 3 Let's check if our message was deleted:... X-Trace: news1.example.com 1086341434 6878 our.IP.address (4 Jun 2004 09:30:34 GMT) X-Complaints-To: abuse@news1.example.com NNTP-Posting-Date: Fri, 4 Jun 2004 09:30:34 +0000 (UTC) Body: Xref: news1.example.com alt.test:1494996 < < < < < < This is a simple test Ignore it < < > ARTICLE If our message got to the server, we will see it together with all headers (Listing 2):... configuration of their server so that it starts sending new messages to server A and agrees to receive new messages from its users If any forms of abuse take place on server A and its administrator takes no action, the owner of � ����������������� Figure 1 How Usenet servers exchange messages B can, at any time, revoke the feed (stop sending new messages) and stop receiving messages from A Let us take... User mailbox is currently unavailable (i.e blocked by other process) 451 Local error in mail processing 452 Temporary lack of free disc space 500 No such command 501 Syntax error in command or its parameters 502 Command not implemented 550 User mailbox is unavailable 552 Disc quota has been exceeded A full list of codes and rules for their creation can be found in RFC 2821 (available on our CD) The answer: . index.html  le. What's new We have changed the base system in the new issue. The 2.4 version of h9l is based on Aurox Live 10.1. The system operates. of servers): news1.example.com, news2.example.com and news3. example.com. Let us also assume, that the user has sent their message to the news1.example.com