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之前发过一个帖子有关Telus, Shaw 的比较, " g7 s2 t: a0 D: S* g$ p
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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8 M8 e; u8 O* l3 B9 l) zDoes Telus block any ports?
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1 s8 P, q% g; a& p! n7 pThe only packages with no blocked ports at this time are the Server packages.
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3 Q; z+ E. z$ D$ oThe Blocked ports currently are:
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6 j; [) k: v" B8 N5 h9 mTCP 21 (ftp), W8 K- ], Z* a& C B) Z2 m
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.+ Z3 b9 Y Y# }; S: K w
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TCP 25 (smtp)
2 l) p* N- G1 MCustomers 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.6 @ z: w0 e$ Y) Q z
1 `1 q6 S5 {3 l( ?) }TCP 80 (www)" F, B+ Q# ?7 `2 D- J0 D
Customers 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.! ^4 {4 J8 g7 J
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TCP 110 (pop3)
: L m1 [( W, Q1 A! V7 Y, w5 KCustomers 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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U% }; o; |5 j9 m' n BTCP 6667 (ircd). F9 W; [4 D* n- r
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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7 G7 N r! l* c: }& MTCP/UDP 135-139 (dcom and netbios)
# D7 ^3 W2 P; N6 J+ cThese ports are commonly exploited by worm viruses:" H$ j: _7 t' }8 K3 h7 s/ K- O) }
135 Windows RPC
: w( L9 l6 w+ W9 ~136 PROFILE Naming System (basically unused)# N3 p- D+ d6 T, c* W
137-139 Windows NetBios7 R# D$ d) W$ E
9 H$ E5 p: H+ z! Q8 JTCP/UDP 445 (ms-ds)% s4 X3 Q/ R* s7 e o X" d
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.
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: q+ B' L5 A6 U8 fTCP/UDP 1433-1434 (ms-sql)
' E# E- }7 X0 l3 cMicrosoft 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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