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之前发过一个帖子有关Telus, Shaw 的比较,
5 {5 L8 T8 w) q- j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 Y1 f% }' G! i7 @, z
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Does Telus block any ports? 4 y* P- b) X1 s* I- f
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The only packages with no blocked ports at this time are the Server packages.
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w) i* f( | G _% y. \4 ?The Blocked ports currently are:9 c- h# q* ?8 j
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TCP 21 (ftp)
. t* ?: m6 @3 {; ?& t0 pCustomers 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.! ~" k6 O1 a0 `
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TCP 25 (smtp)6 x0 K1 Q" g( [5 q5 F& J ?- `
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.( B% R2 h9 I' m" Y1 v. J; r
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TCP 80 (www)% N# B& b& E, G( T9 {# |0 V& K
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.
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, S( ~1 ? `* {TCP 110 (pop3)! b1 k1 @( F- p! S
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.
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TCP 6667 (ircd)" a! ^+ ]7 X# W
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.6 v0 z* j" R! d, j
/ a8 c) F! o+ _+ ?2 c s: ]8 ]0 KTCP/UDP 135-139 (dcom and netbios)6 \( E) ~+ `$ L0 @+ l% r( X" b
These ports are commonly exploited by worm viruses:
7 e( c4 k$ M& y. v4 v. |2 J135 Windows RPC8 B' Y; N9 {3 ` V1 z2 T
136 PROFILE Naming System (basically unused); s7 _# q) ~# e, K# j
137-139 Windows NetBios
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" `% F' `4 [- Q/ d% l! h) \TCP/UDP 445 (ms-ds)1 ~5 {8 s$ {1 P; t S& f g& O# P
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.4 {3 C" N2 T; n$ v B4 a8 }
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TCP/UDP 1433-1434 (ms-sql)
: k! s8 P# k/ b6 D1 fMicrosoft 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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