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之前发过一个帖子有关Telus, Shaw 的比较, % ?$ o2 W' Z% a4 D$ 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。+ o& |* c& p' y7 X: H
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Does Telus block any ports? * i, \9 X9 h5 {& W
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The only packages with no blocked ports at this time are the Server packages.
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' H4 T& ?& X- c4 {; o- W. L- GThe Blocked ports currently are:
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4 }$ `5 ] v* m+ ?5 \! J' CTCP 21 (ftp)8 z% x8 }( K8 H2 G
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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. x* I+ A' @4 E$ @TCP 25 (smtp)
' ? l7 D h5 O+ M* D, iCustomers 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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; D S! ]" S/ ETCP 80 (www)5 D# W5 x' [' Q) I# I8 T# B
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) ?! A: R& x& \$ _0 z3 E1 Y
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., Y* z! o* R' _1 Y! q
8 w3 Z; b6 Y( P& u/ c% M3 `TCP 6667 (ircd)( G' P9 |3 v0 W6 r0 q1 O
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.* H- q$ n/ k# }. w, u H
. q0 b, W1 h0 Y2 c Z; oTCP/UDP 135-139 (dcom and netbios)
4 q9 m P# x# F1 gThese ports are commonly exploited by worm viruses:
2 b4 e/ Z& J* X/ \" z135 Windows RPC
% C. k7 C, s. z' o8 ~136 PROFILE Naming System (basically unused)5 `2 T* e4 h: e- Z* Q1 j9 b. o
137-139 Windows NetBios: x* e. Q5 B# b* x7 U- g
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TCP/UDP 445 (ms-ds)3 I3 ]% b9 s! O. R
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.. w& [' R5 \# q/ }! c ~) t
5 B4 i# h" d2 N zTCP/UDP 1433-1434 (ms-sql)7 a! a' K) [6 h" T4 c
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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