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之前发过一个帖子有关Telus, Shaw 的比较,
+ P+ F0 @$ ~0 [' B, v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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4 ^& q! e5 ?7 v8 p cDoes Telus block any ports? / I# f' z, w P: e3 b; B
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The only packages with no blocked ports at this time are the Server packages.
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" k X. N( ?& l' B" iThe Blocked ports currently are:' m' [! ?5 ^% m( o
' s9 u; R3 {/ |TCP 21 (ftp)
$ I, Q! O' I- I. hCustomers 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.# Z8 n7 e/ J$ e, s: G6 S6 z
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TCP 25 (smtp). O) z* q1 A3 t( ], G) l
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./ F4 v$ g* b) p# X, G% c1 k
- O) g" |$ y: v% A3 f7 yTCP 80 (www)
) x) J5 o0 h9 A' kCustomers 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. f: f6 H6 v U. V% `" r
7 D1 D. u8 W/ CTCP 110 (pop3)
5 B; O3 t* B5 ?4 o2 I! D7 p7 CCustomers 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.+ W, U9 G% D: J0 l
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TCP 6667 (ircd)3 g4 g# w' @ P1 C
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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. B% ^0 o( P) uTCP/UDP 135-139 (dcom and netbios)
% `. {6 p- V5 ?These ports are commonly exploited by worm viruses:
3 @& u/ Y" H) ^2 S+ e135 Windows RPC
. m+ y2 {: e2 D136 PROFILE Naming System (basically unused)
$ x U# G& c1 s- s137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)9 @6 ?5 I/ k) C) K% F
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.- W6 c. Z; C& ^2 q1 `
" `& E i( N* S6 {0 {, t9 r9 t5 OTCP/UDP 1433-1434 (ms-sql)
4 e* [% l% G& b1 TMicrosoft 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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