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之前发过一个帖子有关Telus, Shaw 的比较, / V$ b) o& l2 t1 `+ k, q/ v% B9 M- }
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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1 ?# _" k) v2 S. r# hThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:9 ?8 |* u8 b- l' Y
2 _+ z0 t- f* ETCP 21 (ftp)0 M8 ]$ q/ k$ T7 f+ X3 n0 L! m
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)+ E8 R5 k |# Z
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.% g% E+ \, n# V& n* L
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TCP 80 (www)
3 p) K- J! p" @( B4 JCustomers 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)! n K+ t9 v6 P% P2 `' t
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.+ l9 `3 A2 i* o: N+ L" Q/ M/ z
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TCP 6667 (ircd) X2 E0 y- O& O. M2 S4 N6 h4 }
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.% H4 x0 d% [2 D- w+ z0 u, B
" z( g ~% L/ r/ m a( R4 [0 N) tTCP/UDP 135-139 (dcom and netbios)
" ~$ X: s* [$ L6 XThese ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)
- j$ a( a7 t* _$ y137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)% J5 C! b( u+ Y, V: V3 n
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.
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TCP/UDP 1433-1434 (ms-sql)
4 W$ n- p2 E b0 T: 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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