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之前发过一个帖子有关Telus, Shaw 的比较, 1 n1 e! f5 b, K7 l! Z
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。" e' Q( ^7 S0 N: L
5 y6 s& T: Z3 _- i) ~! P) iDoes Telus block any ports?
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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:% Z+ {' P" k' V }9 A8 ^
S8 M r" O: t0 j8 oTCP 21 (ftp)* C4 c; s' d" e5 N l1 Q6 H
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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1 @+ ~& C3 p% @, D& D% ~TCP 25 (smtp)
" a7 P$ Z8 b- q6 c. [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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9 t/ P% z6 g- q% Q% t' DTCP 80 (www)
' K$ s* F" {. f P5 ^' c* ]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.
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TCP 110 (pop3)
+ n+ G8 r5 L( X" R0 D2 ECustomers 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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TCP 6667 (ircd)
. L8 O* S3 q, G7 P4 @Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.) z, m% P7 [, z3 _
! A- c& A" i/ Z, n# HTCP/UDP 135-139 (dcom and netbios)
% z% U8 h6 P0 x2 P, PThese ports are commonly exploited by worm viruses:
6 ^: L4 `( o4 \3 H135 Windows RPC8 T( C v. p2 \
136 PROFILE Naming System (basically unused)
$ r, T7 u& [' v. ~( Q1 J6 ^: \ w137-139 Windows NetBios0 [) I5 z7 m: a- T% C% T) b4 V- o1 I
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TCP/UDP 445 (ms-ds)
" c8 q# J3 H9 y, LMicrosoft 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.+ m; u! e; R/ Y7 k* D O6 q K' n& q
3 |6 g7 R5 D T; J {$ ITCP/UDP 1433-1434 (ms-sql)
: q6 m, b. P; j) Z& ]2 y. {- KMicrosoft 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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