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之前发过一个帖子有关Telus, Shaw 的比较,
9 W/ T+ z- H: D( k" z% l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。2 N8 a: P1 D# f, p# ?3 w% r
! E4 j( y1 ]1 lDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. 8 C5 e5 z' F" j
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The Blocked ports currently are:
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TCP 21 (ftp)0 K3 D( e* T3 q. R3 N8 p6 E1 }
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.: h. ^! i% B; Q* H ]- ?1 [
& [2 l) ]. e- _2 c7 XTCP 25 (smtp)
I. d* _; z6 fCustomers 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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- g! T, `7 w: D: _; b/ tTCP 80 (www)
% y5 [7 V; [* r6 G; @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.0 G$ [& H, f) x: y3 i
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TCP 110 (pop3)
5 j3 y i2 z. R% d) v, p; MCustomers 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)% f. K! w8 R4 A" b, F6 G
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.8 v: n# G4 k7 \* o# Q1 c3 ~
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TCP/UDP 135-139 (dcom and netbios)
4 q) M, `8 B6 D: h# P1 qThese ports are commonly exploited by worm viruses:2 d/ B3 q. r. g
135 Windows RPC
9 _( T8 G& M: G) C136 PROFILE Naming System (basically unused)
; L( {6 i2 c0 j' U' l137-139 Windows NetBios$ X$ L0 i) K$ G6 R4 D
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TCP/UDP 445 (ms-ds)
! O5 W: ^' L' q$ mMicrosoft 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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TCP/UDP 1433-1434 (ms-sql)
& z# u! h% s6 Z, H! S- _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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