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之前发过一个帖子有关Telus, Shaw 的比较,
! A K1 S& T# X, Q* J# P: ?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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. }1 f# {8 r0 Y+ a" `' ~& WDoes Telus block any ports?
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" D' T1 P6 L, k8 mThe only packages with no blocked ports at this time are the Server packages.
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0 Y# \3 n G8 gThe Blocked ports currently are:
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TCP 21 (ftp)% I9 T& ]1 j% I/ S, b3 u
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)9 H5 R- z5 N1 b. }1 Z$ G1 v
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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TCP 80 (www)
& P+ k; N7 ^. z aCustomers 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.$ M) _' ~3 X8 r. C. r' o
* b: o9 R) C, S$ L4 }0 O! a# I! MTCP 110 (pop3)# K. r% y6 A" d1 N
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.4 _0 e2 m+ u! y/ m
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TCP 6667 (ircd)
) e; Z% s4 ^. Z: U& [Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server./ m# h: P% W! j" j: L
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TCP/UDP 135-139 (dcom and netbios)
: N8 E1 _, @+ B" \/ N0 p- X8 z, xThese ports are commonly exploited by worm viruses:
& U. d4 D$ c; H" K135 Windows RPC
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137-139 Windows NetBios: G" P4 k% a+ Z4 x9 b# R& }
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TCP/UDP 445 (ms-ds)
9 p% U$ d; |" Q: S/ C$ V3 eMicrosoft 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.) @# _$ s3 K) H: c
* w0 E3 z, `5 ?* XTCP/UDP 1433-1434 (ms-sql)' ` K( w. d. I* e: k8 \
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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