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之前发过一个帖子有关Telus, Shaw 的比较, 1 H: i$ p3 L5 r/ a8 _ v
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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; i! S' L& j0 b _3 P( ^3 z1 bDoes Telus block any ports? * ?) p1 k0 Q( e u0 t$ |
: i# M; ^* w/ z+ m5 b% tThe only packages with no blocked ports at this time are the Server packages.
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X/ O1 \# w) ~2 |( a5 e5 B- ^The Blocked ports currently are:
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TCP 21 (ftp)
6 \/ M5 y$ o; s, j: YCustomers 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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, E" z+ A) s9 I& k1 `TCP 25 (smtp)
, h/ I8 p1 d3 b1 s, W9 NCustomers 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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TCP 80 (www)2 V+ \- p) U& X
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)0 Z, I$ O" i4 @/ }8 w1 \1 k
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." [6 T, x, Q& D) j- {% @8 s8 [6 V
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TCP 6667 (ircd)3 x J3 W: }& L
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.! j" ?5 ]8 p( g# _9 e7 U1 r
4 n2 S( k; ]; W1 B: s( l0 j3 j3 ^$ TTCP/UDP 135-139 (dcom and netbios) {* K* G; u/ N, A- a8 Y
These ports are commonly exploited by worm viruses:# B, P f- W% Y' N. n
135 Windows RPC
) ]4 P J& {1 f, Q; _136 PROFILE Naming System (basically unused)
; Q+ C, A- o9 I5 @137-139 Windows NetBios! r" y: m) Q' A
0 d# t* U; H( F* U) V# ]; JTCP/UDP 445 (ms-ds): l; [& l9 ^) M ^, {. K1 i% 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.' {2 ^1 I. ?3 v
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TCP/UDP 1433-1434 (ms-sql)7 Y, z9 c9 Z) N b
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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