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之前发过一个帖子有关Telus, Shaw 的比较,
" E# h' E e4 E5 E* \9 I3 ^5 u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。; j1 ~- y; t+ @3 G/ f
5 Y9 \ E @8 {: r* X. k pDoes Telus block any ports? 2 A8 N: ?9 T, U, F
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:! J" S2 d; E$ w0 G
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TCP 21 (ftp)
& I" k" W3 C7 z1 E* Y" fCustomers 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.$ ?4 c! _& W6 y% C
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TCP 25 (smtp)
0 u; E) X. C7 i# L" P- 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.
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' [6 e u F0 i% | e" g5 `/ jTCP 80 (www)& ?* `2 y5 |9 S
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.- t9 I+ F0 g+ `: @& P" T
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TCP 110 (pop3)' J) O1 ], C4 I# B' p1 g) L, C
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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, W7 q, `. B/ Z5 VTCP 6667 (ircd)* O3 d# B- I" N0 o% @0 F0 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 u$ u% d& _3 U; P2 g; [& DTCP/UDP 135-139 (dcom and netbios). l8 e0 ?- ]: e* m" b! c4 O/ y* |
These ports are commonly exploited by worm viruses:
8 m6 r1 p8 _7 t7 [135 Windows RPC" `, `( C1 I: Q; r( ]
136 PROFILE Naming System (basically unused)
2 o7 K3 i8 ?2 ]1 T137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
& X c: ~4 ^$ H6 I) R. bMicrosoft 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.# q9 b2 c* g0 U
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TCP/UDP 1433-1434 (ms-sql)* W! x5 W8 m( |% m2 ~, \6 D
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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