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之前发过一个帖子有关Telus, Shaw 的比较, " s l- p Z. D% ?1 [* N
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。, r! e1 }$ j& x6 q5 C2 m
; N1 G) e0 K; @3 T$ [2 J3 mDoes Telus block any ports? , q6 b9 ^$ k* l9 b9 d- x
$ s7 t+ E4 w) E- gThe only packages with no blocked ports at this time are the Server packages. ( A" |5 J; ^1 e: X8 R. C
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The Blocked ports currently are:0 j9 `. g+ o& ^# h; C1 o
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TCP 21 (ftp)
; K+ H* h5 F; w5 ]& Z% x& \) @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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/ D! V Y8 w! w& z# t% oTCP 25 (smtp)
d x2 R$ b% Y* n$ s/ t* G0 oCustomers 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.: z# y2 e1 m% C- h; M
9 M3 i$ d( M4 ?) FTCP 80 (www)0 D: }% \' a0 O& T7 Z! F9 w4 F
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.& N+ h1 L4 @! }/ ?2 h0 x) ]& n4 G
6 `# X9 x6 A$ W1 N) } WTCP 110 (pop3)
, P0 d4 [, V' ~& q' W1 Q7 rCustomers 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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g& k; R6 U& aTCP 6667 (ircd)2 S. u7 g$ a1 U
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.+ q0 n2 r+ q2 r+ O3 W+ X
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TCP/UDP 135-139 (dcom and netbios)
$ ^( d9 `7 l$ S ~/ xThese ports are commonly exploited by worm viruses:
0 Y$ a6 Y" x6 _+ {- ~135 Windows RPC5 A5 B r9 ], d! L% {
136 PROFILE Naming System (basically unused)
3 H0 }8 h1 l( R. A137-139 Windows NetBios1 v0 G ]5 X% U( p3 B9 ~: Y
2 M5 D( p. w8 z3 B: l4 tTCP/UDP 445 (ms-ds)7 m% J$ ]8 L/ j# r# R- F- ~9 r
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.7 @1 c: n. D7 l+ q8 p
5 U. N& K, ^4 h! n) }, H: eTCP/UDP 1433-1434 (ms-sql)
# l# l$ `* @ p+ y4 \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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