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之前发过一个帖子有关Telus, Shaw 的比较,
' A3 t% ` Q; b$ D' h3 z3 m; `/ f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。! D" f+ T7 X( O
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Does Telus block any ports? 4 M7 f% D4 L2 b1 l+ C$ d* {, ]4 o
6 E" K% {7 a& |% { n2 D! TThe only packages with no blocked ports at this time are the Server packages.
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4 _* ^4 b. |4 A: s0 q qThe Blocked ports currently are:( V$ y: {+ y4 D9 u3 `" J
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TCP 21 (ftp)3 O+ S1 X4 w, e) @' H" Z/ C T
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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+ Z1 | P( s% \5 b) G8 B! M8 DTCP 25 (smtp)( |8 B; k' C" m' c' i% [8 a3 l! f
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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8 A" H @: l& V# X4 F9 d9 OTCP 80 (www)$ ^0 U3 b4 R# n9 U
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.+ M3 `" A& z% t- f9 I: S: w
X2 e Z# p3 `7 x" P @! fTCP 110 (pop3)" n$ Y7 |, y0 Y) x% y
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.6 E" C; a3 j5 L0 Z
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TCP 6667 (ircd)% w2 F0 a! i7 [* R
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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0 I% v+ E# X c5 e5 H; ITCP/UDP 135-139 (dcom and netbios)( S0 s n1 l$ o! V7 Q, t) U9 i3 Z
These ports are commonly exploited by worm viruses:4 e/ b2 \+ I b1 _( U1 r
135 Windows RPC
8 s5 H5 ]# v6 s4 q1 v" M& ?136 PROFILE Naming System (basically unused)4 c4 w5 p$ w- ~7 c* @+ R
137-139 Windows NetBios& z0 w2 }! T3 m
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TCP/UDP 445 (ms-ds)2 l, J7 Y S. a/ @) V
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.
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' ~* @4 d" M6 c- h5 C* pTCP/UDP 1433-1434 (ms-sql)
: {" J6 c8 X6 ]- }! z4 \2 v# dMicrosoft 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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