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之前发过一个帖子有关Telus, Shaw 的比较,
# v* m" A3 n( K, W' X) E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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9 X: t) F7 B: u0 |& {$ }Does Telus block any ports?
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4 ]( j: W* w( B4 b3 ^, ZThe only packages with no blocked ports at this time are the Server packages.
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/ n& d6 s; q( _6 _' Z6 ~7 _The Blocked ports currently are:& N% _2 I" D: v! F- Z
" s" M4 l- d6 e# NTCP 21 (ftp)
/ ~! O% v& u* p' d y* ?! q/ V$ ECustomers 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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TCP 25 (smtp)7 @% _7 K) S0 ~, E3 {; `
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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TCP 80 (www)
: \: y5 K; W) ], H5 A, U& o9 QCustomers 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.
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TCP 110 (pop3)
- H2 d) [6 J2 Y1 V; ACustomers 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./ I/ g6 B1 L' J$ \) b4 J7 _. s0 B6 U
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TCP 6667 (ircd)/ p1 m0 F7 n; V, V4 ]: q( x1 `. `
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server., k3 J' `: \1 F$ @ f9 ~
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TCP/UDP 135-139 (dcom and netbios); t6 \0 E( R5 W6 m
These ports are commonly exploited by worm viruses:
3 y: x/ I* ]- F; f5 a8 B135 Windows RPC9 U, \2 o1 J: ?" B! s
136 PROFILE Naming System (basically unused)' e6 F9 r& \) P( M$ S. q4 I
137-139 Windows NetBios
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5 z: Y) C% Q# }! I) OTCP/UDP 445 (ms-ds)) H1 y, s! B' z5 m, Y2 N# \, 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.* S+ B0 |( |/ | G. o7 p# E
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TCP/UDP 1433-1434 (ms-sql)# m! _. N) i- o) Y
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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