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之前发过一个帖子有关Telus, Shaw 的比较, $ `2 U' W, D) }' D0 p9 Z( X
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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* @/ ]+ S& e5 P* y* i7 X3 I& G3 \Does Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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2 K# }" g# p8 s f1 bThe Blocked ports currently are:
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TCP 21 (ftp)
' D# \- e4 W! j- m/ Q2 qCustomers 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.* ]: y( U, B5 e( F/ D; M
- H: H5 i2 {6 bTCP 25 (smtp)% r- [3 y/ J$ E6 Q8 V+ }5 h/ c: 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.
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! F/ B7 E: K" X% X- zTCP 80 (www)
1 ~4 h# }& Q: ]1 tCustomers 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.& F+ ~( M2 g! ]; R$ F* \: h3 Y2 `
1 l- T0 L9 q" l' W7 B' m9 `7 pTCP 110 (pop3)" t1 R i1 z8 h/ p
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); a1 K: u& d( b% s
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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+ U2 o) H G' VTCP/UDP 135-139 (dcom and netbios)6 n; P$ a- U3 h
These ports are commonly exploited by worm viruses:
% ?( A W+ X. s' x2 `0 ?- E135 Windows RPC
; K# H) q& A* q* | H3 [# I136 PROFILE Naming System (basically unused)5 w# @* c& L4 m" Y p0 T
137-139 Windows NetBios+ N1 y9 Q5 x. w8 [1 `$ G! C
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TCP/UDP 445 (ms-ds)
2 [) b: T, a' K( F# z7 W! U, g. y; AMicrosoft 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.
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TCP/UDP 1433-1434 (ms-sql)6 G7 }6 H# d/ Z. d2 v# q v
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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