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之前发过一个帖子有关Telus, Shaw 的比较,
8 X5 @" ~" Y0 A- H. 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。, d, H' N- H- W7 h3 x% D& x0 H% K
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Does Telus block any ports? % o( s7 _& U- U5 a# o; _5 T
1 }5 u) e7 |( o9 ] [! x0 WThe only packages with no blocked ports at this time are the Server packages.
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O' [( P! Z$ b# E" A, W" ^The Blocked ports currently are:
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- r" S }/ e' O m- j2 XTCP 21 (ftp)
9 b6 | w! p( P. f" W' {$ ~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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( ]4 }9 j! H: K* U3 [* K) LTCP 25 (smtp). d8 i; D" K8 R2 _1 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.
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# Y8 G) A/ F& ^TCP 80 (www)
& N; ~3 S) F8 m6 R/ d$ M) Q4 lCustomers 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.0 Z; k. N" i/ `0 }7 U% l( N; \
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TCP 110 (pop3)
" S8 c( i+ [# xCustomers 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.* q4 B# x$ h6 c5 g9 E
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TCP 6667 (ircd)
) q. p) n, c1 e3 e' @5 f) a7 QCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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) t" n, `2 {" s5 h5 P; o- uTCP/UDP 135-139 (dcom and netbios)# V% f- w# l G
These ports are commonly exploited by worm viruses:
7 ?5 ?5 w" z1 t1 d135 Windows RPC
9 r1 h9 T: W" @. G+ Y4 K4 I136 PROFILE Naming System (basically unused)" L% q" }# S: ~* ^
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
( \1 t0 L. E& G% AMicrosoft 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.# }! o Y# S* ]+ L# Z
, T* I& j. q+ bTCP/UDP 1433-1434 (ms-sql)
4 _3 R. @: A: a/ }$ O6 k; l/ h' VMicrosoft 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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