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之前发过一个帖子有关Telus, Shaw 的比较,
3 C _* I( [; ]2 I) y: j# u# i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。 F( P# B' H' F
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Does Telus block any ports? # W7 b! g5 @( A8 Z V- d
6 J$ u( o, a I$ Y4 M! }2 [The only packages with no blocked ports at this time are the Server packages.
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. i e$ t2 h0 p0 H9 eThe Blocked ports currently are:- K+ |' C" \- i7 \0 Q5 d
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TCP 21 (ftp)0 o! p, y' J" f( }
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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C. `/ s! _, a8 n9 ]TCP 25 (smtp)8 N4 X* k; l o# Y M5 i. h( K$ o
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.( k& V; p6 I3 M% ~
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TCP 80 (www)1 @* s8 i2 c8 u; n
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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* B$ D+ o% A+ E7 tTCP 110 (pop3)
0 o1 J) Z3 s% f8 D' D) ICustomers 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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: ^# x& N8 r" S3 A0 ~3 m, CTCP 6667 (ircd)
4 X4 E& ^ W I/ a2 k, W" `Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.* A& a" W' K9 o$ K1 a
# Z' R+ Y* @7 f9 m" v% t, hTCP/UDP 135-139 (dcom and netbios)- [ l0 S1 m+ w
These ports are commonly exploited by worm viruses:
7 I4 {4 c2 h" u1 c" K3 b( b- x) P135 Windows RPC" J- b) ]3 |. n, n
136 PROFILE Naming System (basically unused)
% d3 n% R V9 e0 _137-139 Windows NetBios
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7 \/ V) w0 ], O* R; P7 X/ ]TCP/UDP 445 (ms-ds)
S4 r h+ K/ J: y- o B+ H" Y2 tMicrosoft 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., L8 L$ P9 i* b# h t1 w- v
# ^( J" {0 d5 ZTCP/UDP 1433-1434 (ms-sql)* _2 m+ b7 c3 o* G
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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