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之前发过一个帖子有关Telus, Shaw 的比较,
0 T' U* x- o6 P% D [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。+ y( @" y5 T* s! K7 h# v
/ O9 i" |( W& x7 [" c2 [! EDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. " ` S9 B2 n; f7 \9 {$ o
" }/ P0 N& F# x3 I8 z6 ]- C" WThe Blocked ports currently are:
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TCP 21 (ftp)
+ t* _# e+ o5 R2 @2 G; r, _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.3 j n- n1 B$ U; L; {+ p" ^! d# b
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TCP 25 (smtp)
4 i k: v6 L A; jCustomers 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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0 g* D A$ o0 \; z* q2 @TCP 80 (www)
3 j" y/ m; H% j* C- @( D+ J0 n6 f& m MCustomers 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 t7 {) @! Q2 D0 _8 h: x" e4 `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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: a& N8 A: f' Y" qTCP 6667 (ircd)
* w# ^; Y+ Y) g9 ]* A. D: H- FCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
$ t$ I6 |0 W9 J0 l; JThese ports are commonly exploited by worm viruses:7 k5 @: C i2 r! k& N
135 Windows RPC/ Y- X, D* h# H. J9 a4 Q8 R
136 PROFILE Naming System (basically unused)
4 Z% Q0 j# e, H7 D5 v J137-139 Windows NetBios
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4 r) f' e9 |9 c' P$ q9 cTCP/UDP 445 (ms-ds)/ T3 j+ h% x R& u3 u
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.: I" d8 s* X* m, A, G* W. h% r
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TCP/UDP 1433-1434 (ms-sql)
! E" M; J7 r) v# [: a9 pMicrosoft 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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