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之前发过一个帖子有关Telus, Shaw 的比较,
! _ m9 N5 k k. i) |1 O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。 M& C: v* m* ^1 o
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Does Telus block any ports?
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. [. a( J5 B- [! H( ]6 k7 ]/ uThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)& P, f3 x# ^" o8 I2 D
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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& |7 ]. O& b0 F- CTCP 25 (smtp)3 K7 o8 l2 p* ~, m
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.3 K& m, G8 Z5 @: T! s
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TCP 80 (www)
" H: w* p& e4 Q/ i: b- N; y1 `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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" F1 @( x; U8 H3 x7 N8 \6 ~3 JTCP 110 (pop3)
/ @, k4 M$ r8 BCustomers 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.$ x# ^# |- U; d6 M! h, o
( e) ^* p# {' S7 [4 C* k Z) i7 ATCP 6667 (ircd)
' e9 B* Z* `3 r H4 N$ Y$ t" @1 O+ V. ACustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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2 Q b& x/ o$ V7 s% MTCP/UDP 135-139 (dcom and netbios)
# N8 o1 G6 q7 M& U5 |/ n4 H# ZThese ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)0 n; J5 |* }- ]( D
137-139 Windows NetBios& N8 n- Y4 W4 q% f
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TCP/UDP 445 (ms-ds)9 w2 u& x4 k x9 b) ^$ `
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)
9 A1 ~; h! i# i' F4 ^2 E! e. S8 a$ M5 BMicrosoft 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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