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之前发过一个帖子有关Telus, Shaw 的比较, 5 t1 r# O9 @* K: t) n
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。3 w. x9 h# X. g7 z, M/ W. n% e3 R
3 a5 | }: q9 M# m; `# nDoes 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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& \* `( C/ }, k S$ R+ L$ n( iThe Blocked ports currently are:
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' [! X; R1 @9 gTCP 21 (ftp)
7 \, T- b8 Z8 a) b- ]1 GCustomers 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.$ V) P3 d& F# P4 {
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TCP 25 (smtp)7 I) e2 n- j1 F/ Z+ R O- x d
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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7 J3 q! d) e) e* w( |TCP 80 (www)! y3 w. f9 Y/ }
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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+ l$ {0 f6 A% I3 m. o6 JTCP 110 (pop3)
) f5 \4 q( P1 p1 Z" b5 U# \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)
) V& @2 I7 z) _/ t/ r1 BCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server. ?2 C" X7 B Z3 M
2 Q& B6 }6 F: V, KTCP/UDP 135-139 (dcom and netbios)8 v* m0 ]9 K- ?- j% S
These ports are commonly exploited by worm viruses:/ i9 ^4 l: p9 s2 x: l& ?- r- d
135 Windows RPC
e, e6 J" n) i1 j) k+ f136 PROFILE Naming System (basically unused)5 ~; e. E2 @. S4 O! B- O
137-139 Windows NetBios: N% F+ ?$ j; o& p
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TCP/UDP 445 (ms-ds)
( `) n. C) B& i9 [# a2 | N4 d6 t. mMicrosoft 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. T5 Z- s0 D* a
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TCP/UDP 1433-1434 (ms-sql)+ R$ C" X$ f( ^9 w5 ]# J. z2 \
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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