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之前发过一个帖子有关Telus, Shaw 的比较,
3 O6 Y% Y& c' v" l$ s, _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。- X. w9 h' \3 Y% _5 o
8 ]' f( s- |! TDoes Telus block any ports? & a! b5 \& F6 p) v1 I9 g
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The only packages with no blocked ports at this time are the Server packages.
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! q9 o" j$ u. d0 I4 ]9 q* WThe Blocked ports currently are:
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7 k" |, X3 c* p3 rTCP 21 (ftp)1 [5 \% _6 V( y* R) p* x9 m
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.8 ]$ j0 [4 \/ g
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TCP 25 (smtp)
$ a9 Y" t! e8 p4 |" c1 gCustomers 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.' Z) q: ?% s1 L1 c* ^( r
4 E/ v7 A" h# x6 \. @+ HTCP 80 (www)& P1 V- a& y6 |0 Z; @
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.! B d! `* m2 ^! V
+ z4 ]1 p! ?: f, @9 f- C3 gTCP 110 (pop3), k3 v" { h& q" t8 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.! t) g+ h7 ]) R. V: y3 C
* p+ [# g: \; i' H" ?( D# M$ uTCP 6667 (ircd)
# B. X% b1 ]' n N$ n# y$ ^4 gCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.: A" \. f+ j; Y5 B' j
- R! T$ r' N* L9 o$ @TCP/UDP 135-139 (dcom and netbios)- Y' g" ]5 ~2 d3 D* |2 O0 y* G
These ports are commonly exploited by worm viruses:1 b4 H6 q4 ~: C% q4 a; }6 ]
135 Windows RPC- n8 @6 {/ S' c9 W3 K
136 PROFILE Naming System (basically unused)4 ?9 w( N! {! n9 j
137-139 Windows NetBios1 \' d2 `) o/ ^! b1 s0 l2 j
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TCP/UDP 445 (ms-ds)
1 K4 T, J$ g- E0 q' k! V9 S8 C' H0 bMicrosoft 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.6 E& ^3 i; a7 ]5 t
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TCP/UDP 1433-1434 (ms-sql)1 y1 _! D* |1 m- {
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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