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之前发过一个帖子有关Telus, Shaw 的比较, , S% f/ G: @; c* J# u0 ?8 U- w
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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% t2 K" E) x% [ VDoes Telus block any ports? 5 q7 p$ d3 i$ h/ r
7 `+ m s5 _1 X/ a8 B6 TThe only packages with no blocked ports at this time are the Server packages.
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+ @& u& V& | Q5 hThe Blocked ports currently are:: o) o h% L' t" _( Y* z
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TCP 21 (ftp)
: Y+ l0 _4 H5 q1 C. ~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.) x# @. E. l! {' A& M
# \0 E# n w* _; Z8 bTCP 25 (smtp); ~) T& b; t4 l2 N8 e
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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- B7 d# d$ \9 K/ T. l* kTCP 80 (www) s: p: ~4 a8 W, A' ]( F# }$ T' {
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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TCP 110 (pop3)
% z: c( D& O# b! r; lCustomers 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)+ }- c* L# T$ k9 i
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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TCP/UDP 135-139 (dcom and netbios)2 [+ I2 J% }$ h: ~0 s/ h, j
These ports are commonly exploited by worm viruses:
0 I( ]( L a1 K135 Windows RPC
- q$ i* E& Q: X0 Q136 PROFILE Naming System (basically unused)
7 i# v k& W9 |6 h( s' B137-139 Windows NetBios
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1 w* g/ |7 c$ bTCP/UDP 445 (ms-ds)) m, C9 \. f( R! q. k
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) @& v. N" ^" a
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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