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之前发过一个帖子有关Telus, Shaw 的比较, ! L* s( r j0 ?0 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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Does Telus block any ports? ' U: V# s. v. N9 A0 M$ j- ?1 E
% y+ x' J& c5 bThe only packages with no blocked ports at this time are the Server packages.
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1 i; `" y ]' Z* w1 ?: _2 qThe Blocked ports currently are:
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TCP 21 (ftp)
: s3 {5 b Q: w2 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.
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TCP 25 (smtp)
3 @) D! `$ H+ b+ J2 z TCustomers 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.7 Z0 W: C* P1 U3 B: E) n0 F3 N
' g& _0 M7 F' o* T" L6 }$ I" u/ zTCP 80 (www)
0 {, ^7 B9 O+ D. w/ _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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/ {4 e5 }! a) }& [" {TCP 110 (pop3)
7 x) X' n U4 L+ D* WCustomers 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.8 j' d6 G) y# V- n7 v$ C" m
6 c& A5 g7 X, [ [( R7 ]TCP 6667 (ircd)( U) h* C6 E! r' k) m! }( w0 E6 o
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.: t7 O: K% X& T5 o# f9 j
7 a: t+ i$ @! @6 k- KTCP/UDP 135-139 (dcom and netbios)4 ]" A# K' Z3 S; }% ^" T
These ports are commonly exploited by worm viruses:! |- R6 r/ b4 Q- t/ C) l
135 Windows RPC
# W, P. w6 e8 h: q: T) g4 S' ~136 PROFILE Naming System (basically unused) ~* z7 R; c* G) C4 r
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)+ m4 ~* L( t( L+ a, Z1 {# ~! _
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.0 W, I, ^4 p) R1 S7 j2 h' ^1 C, G
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TCP/UDP 1433-1434 (ms-sql)1 T* f# B* a, w) h5 L
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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