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之前发过一个帖子有关Telus, Shaw 的比较, $ p: ]+ u' c! j; H
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。5 t0 {! p" m6 @' Z5 C' t8 B
3 `! n6 n9 t' u/ ZDoes Telus block any ports? 2 |1 d$ i) C$ K# k9 ]& o/ x+ \ M
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The only packages with no blocked ports at this time are the Server packages. , m" u1 y7 X! y& T9 O2 {
' L, d, X. l+ ~* X- w% z$ d0 w" q! AThe Blocked ports currently are:
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8 ]- }2 Q5 h/ L- D' u3 q+ S% v9 PTCP 21 (ftp)0 }( \' \. y2 {& d$ Z, v
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)
/ ]8 i% E- r5 HCustomers 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.6 g x/ {( F% n; j; ?3 D; W
8 ~9 K8 A T( r/ L& YTCP 80 (www)
# `- }$ b4 {, d( f/ [) PCustomers 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.; ^: A& m/ L% N p2 u, H
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TCP 110 (pop3)
, h! C5 i2 p1 f2 K- \3 J c. 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.* e. a1 W# r% q. R; Z, V! r
( N# Q" x3 o* f6 \TCP 6667 (ircd)
: Y u0 F* }% l% r* R7 GCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.- f! }% r+ \' [0 O J6 l& U3 O, L
8 O$ q4 K; ]$ Z' g( x8 F" O/ }TCP/UDP 135-139 (dcom and netbios)7 ^7 W) M; B: \; a o5 a9 v
These ports are commonly exploited by worm viruses:' o$ P( D- M; a! D7 j3 W6 |
135 Windows RPC
: ?! C& N G; ?* y2 e136 PROFILE Naming System (basically unused)
0 n5 c x2 ^5 w& @! X! U0 H137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
4 Y/ C8 m9 _/ t: SMicrosoft 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.8 T B+ P( F: h g% h( L
3 e5 ]( ]( v2 ]7 v! FTCP/UDP 1433-1434 (ms-sql)
, F N8 @# @- |! N- PMicrosoft 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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