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之前发过一个帖子有关Telus, Shaw 的比较,
7 a, T+ Y) k( l8 d8 @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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- j( z9 R2 C7 ^. w- B1 gDoes Telus block any ports?
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) T5 L7 w( B9 d2 cThe only packages with no blocked ports at this time are the Server packages.
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; W& v7 o9 c6 }* A# [! GThe Blocked ports currently are:% r" w5 [' U. S" u5 L2 Z1 P
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TCP 21 (ftp)
5 k* p3 Y# |0 LCustomers 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.: y+ w0 f3 F8 \1 A; M! h9 P
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TCP 25 (smtp)
2 S& D4 n3 }* D% {& CCustomers 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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TCP 80 (www)
5 i; l7 I/ W6 Y4 v8 WCustomers 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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TCP 110 (pop3)
3 q, r2 u6 ]1 S7 vCustomers 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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1 Z! z+ D3 Y+ R) n9 X) oTCP 6667 (ircd)
3 H) m" g5 D2 H. z* `" tCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.; t# g/ x+ o7 N( @* R
, Q- s- ]" t' u3 h' uTCP/UDP 135-139 (dcom and netbios)
& ]# [$ o. j1 q6 HThese ports are commonly exploited by worm viruses:# J9 v; f$ u+ P2 t
135 Windows RPC
4 i1 f% m( A% B1 O136 PROFILE Naming System (basically unused), A2 V v3 f% T; U# ]
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
" Z& `& h6 n; D+ sMicrosoft 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.& l. M' L7 ~! l9 x9 [
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TCP/UDP 1433-1434 (ms-sql)
( g }7 z9 Y9 s' t' iMicrosoft 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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