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之前发过一个帖子有关Telus, Shaw 的比较,
# w$ j% J, Q$ M, @家用Telus 已经封锁了不少端口。 也随时不通知下说锁就锁, 非常讨厌。
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# n3 X7 ]; _' ~Does Telus block any ports?
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7 I, p n* \: p- o. h, MThe only packages with no blocked ports at this time are the Server packages. ( j; \0 o2 Z& e
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The Blocked ports currently are:
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TCP 21 (ftp)6 `" [' w$ q: M {8 X* b
Customers running an FTP server will no longer be able to have Internet users connect to their server. Many customers computers are used as FTP servers to store illegal files.
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2 P6 F- o3 o5 F9 ^+ \5 LTCP 25 (smtp)
" B, A* j6 ~4 u1 ^Customers running a SMTP mail server will no longer be able to receive email requests. Also, Telus users will not be able to connect to non-Telus smtp servers on port 25. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.
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: I, S3 }$ b+ D2 sTCP 80 (www)
$ f/ y9 c3 F7 y9 I4 N8 YCustomers running a Web server will no longer be able to have Internet users connect to their server. Common exploit on old Window IIS server and Linux boxes that are not properly patched.
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9 {4 l r! j: Y" f, UTCP 110 (pop3)
5 t3 X, L( g. P" O% `8 y" ?6 \Customers running a POP mail server will no longer be able to have Internet users connect to the server. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.
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% X7 @1 W" t& w d" BTCP 6667 (ircd)
% s4 l5 C% i' R! t( tCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server., ]0 v) `( K( |$ j
+ b& u: X* J' A5 V# Z" LTCP/UDP 135-139 (dcom and netbios)
5 E3 X, k) e* ?% F5 w0 \# w5 b+ v6 B, GThese ports are commonly exploited by worm viruses:
* \* w; t$ ?3 B) S135 Windows RPC
' S0 Z& y# @5 F) `. H! H; U; T136 PROFILE Naming System (basically unused)
+ n6 O) ~* I4 |% T$ l, k; f137-139 Windows NetBios
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7 V2 p9 K; |2 A& E6 bTCP/UDP 445 (ms-ds)/ {; S' f! _4 v: P( g m
Microsoft Directory Services - Customers that allow legitimate Internet users access to their computers will loose this ability. This allows hackers to directly connect to a Windows based computer and gain total control over the OS.; p3 Q+ a8 Z. i
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TCP/UDP 1433-1434 (ms-sql)1 _6 L5 Q! o# A
Microsoft SQL server - Customer running an SQL server will no long be able to have Internet user connect to their server. There are several worm viruses that exploit holes in SQL server. |
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