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之前发过一个帖子有关Telus, Shaw 的比较, ' l+ O) X% `3 T1 n/ `" d
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?
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' r" M. }1 Z; a5 n- l2 t0 z7 sThe only packages with no blocked ports at this time are the Server packages.
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; ]+ H. t8 Q) CThe Blocked ports currently are:
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TCP 21 (ftp)
z& x0 }' ?- n3 D- c) \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.9 ]4 b: |$ W+ V6 | G( X
: Z- d: ?" y9 T4 RTCP 25 (smtp)2 b L' ^! r. o9 a
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. Y% u+ h8 M1 z* f1 s' z
0 V0 |: E4 i! j4 a q# l6 gTCP 80 (www)) s* ^; M( a7 r/ {! i
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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9 o/ f: M3 w* s3 [3 M2 n& l. ?% sTCP 110 (pop3)
# [! {- \ _$ P8 w: J0 H$ mCustomers 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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) z) |% O, J" J' e0 ^& N6 o3 kTCP 6667 (ircd)
% N$ a+ _( _' V8 a5 @! LCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.) x" j5 q( r& m* ?
8 R- Z, C' `$ {+ y3 ETCP/UDP 135-139 (dcom and netbios). S! I* q; G: p0 {
These ports are commonly exploited by worm viruses:
7 j5 E. [$ m* B135 Windows RPC7 h; K0 W; k/ J
136 PROFILE Naming System (basically unused)
4 T0 V, q" \3 @137-139 Windows NetBios- ~. Y- d0 Y* ~% V: X
A$ h: T/ u% s/ }TCP/UDP 445 (ms-ds)0 M' C9 ?4 R5 x# J$ K4 G1 m
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. J. _$ s1 F% q9 x6 O7 u/ _# q1 F
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TCP/UDP 1433-1434 (ms-sql)
9 G5 e6 b1 Z' }2 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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