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之前发过一个帖子有关Telus, Shaw 的比较,
" P# p4 a' w: O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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$ C0 d2 y! f4 W0 Z8 LDoes Telus block any ports? / _0 k1 V( Z; r6 N
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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:( n+ w4 g* s! Z4 T
% j( Y, }+ o6 c2 d3 {9 \8 MTCP 21 (ftp)
$ u: M- A) K" {7 j6 s1 oCustomers 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.+ C/ G; Z& N; K1 }9 k4 T0 J
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TCP 25 (smtp)! L6 f5 ]- Q' d9 o
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. o1 \3 d) N8 |# O7 x
4 l( }, T# {3 K% R5 T& @) {TCP 80 (www)
# r1 P X) q2 J) J" `# RCustomers 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.; y; G5 z* x1 ~& T
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TCP 110 (pop3)
. |$ M9 q6 {. |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 q3 X" N3 J4 G9 c0 r% q
- v4 c" d [# H+ I' x$ `6 l0 u4 uTCP 6667 (ircd). J, r2 g" v; z T
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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4 u7 a! g; M2 P! ~3 a$ uTCP/UDP 135-139 (dcom and netbios)
& w1 r3 v) A& m6 ^) oThese ports are commonly exploited by worm viruses:
( j6 G' d6 z! b& l135 Windows RPC3 W6 n3 C7 E8 \' X: N
136 PROFILE Naming System (basically unused)) H M; N `0 C8 }
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
! C5 ]7 z, p( Q+ W8 u3 wMicrosoft 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)
& w$ U4 @! A: d. H! X+ oMicrosoft 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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