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之前发过一个帖子有关Telus, Shaw 的比较, ) v' C- z, X# ^& a
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- {" m. q v2 Y8 J2 o; E3 lDoes Telus block any ports?
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4 C/ `% A7 C5 m7 C' d1 L; L& rThe only packages with no blocked ports at this time are the Server packages. 6 S+ \- D( S4 `6 O1 |
0 A* ^0 E( Z$ YThe Blocked ports currently are:
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TCP 21 (ftp)
4 t$ ?, d Z0 h! S5 fCustomers 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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; W* Z2 h) g& X# ZTCP 25 (smtp)0 i& W& ^- Z0 r* W) n
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.
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: h* A, [; u- }' y6 DTCP 80 (www)/ d9 c( v! s' }! @5 G
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)
& C$ c5 A# o, r! a2 xCustomers 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.) r, d5 Y- f/ D
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TCP 6667 (ircd)
; F% x9 p( c+ \$ qCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.7 b; m/ E% j4 x. T0 O
/ @0 q: ]! J/ W* G9 CTCP/UDP 135-139 (dcom and netbios)7 i' T3 z4 W9 ], r4 L% B
These ports are commonly exploited by worm viruses:
\) I t7 P) o; X! }: L135 Windows RPC, F& k- N) r- Z* C: X, \, I R
136 PROFILE Naming System (basically unused)
! W2 c) A- I, i- G" }137-139 Windows NetBios
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3 w2 h- F# p3 V, Z$ l$ v: yTCP/UDP 445 (ms-ds)8 T ~0 D4 [3 W2 G# Q. t) X( H
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.7 r4 Q! v) n( u" ~; e m) T `
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TCP/UDP 1433-1434 (ms-sql)
# w1 Y3 s' w6 C6 x- QMicrosoft 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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