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之前发过一个帖子有关Telus, Shaw 的比较,
4 y3 G% J( C0 e! N6 l! v; 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。
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* C7 j9 x& b" T6 O' PDoes Telus block any ports? 8 K5 N( N4 X6 }2 T9 M2 l
, X. M/ W0 J- @The only packages with no blocked ports at this time are the Server packages. 6 R% o/ f' s- g8 l. b
& t8 C* @8 y" v- }0 c( ~1 `The Blocked ports currently are:1 k+ G/ p% Y0 n* y$ ?5 F
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TCP 21 (ftp) b! n' L9 t" n
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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TCP 25 (smtp)
' ?) K# w7 [7 }! F 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.
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TCP 80 (www)
\9 N, e5 L) ]5 [) m; uCustomers 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)
( R0 o& I* Y5 l9 CCustomers 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 W) v9 r, w3 C* L
; m x# v( ^* Q- y, n5 u% zTCP 6667 (ircd)
G( D6 c. m2 o; N1 s5 V. S u( {Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.* e1 g5 S' e* ]: o/ W( r
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TCP/UDP 135-139 (dcom and netbios)
7 c: `# D# I% A8 FThese ports are commonly exploited by worm viruses:
4 N! _1 t/ @7 x' g* L135 Windows RPC @/ o! F6 J+ l. w8 J. ] @
136 PROFILE Naming System (basically unused)9 P g- h) B& B. h7 `/ [
137-139 Windows NetBios
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9 a1 x/ ~' y3 W9 [* rTCP/UDP 445 (ms-ds)
5 c2 k# C3 D7 K$ I% i1 jMicrosoft 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.2 H' g0 F, F- `- F, h; T% i( S
5 K6 c1 N9 F5 z0 ?" X. xTCP/UDP 1433-1434 (ms-sql)
# h5 _! j- S3 s8 CMicrosoft 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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