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之前发过一个帖子有关Telus, Shaw 的比较, a7 }0 S6 a/ M( 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。3 K7 X0 X( a5 E4 m/ @! u
7 E% H5 B2 b/ yDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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- G/ @7 d$ s: s" @The Blocked ports currently are:3 G4 w! c" ?7 X/ r
5 N/ M. R; _& W; j: F0 O& RTCP 21 (ftp)! o+ }! M+ t4 S
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)5 \& ~6 \# \9 z5 V+ c
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.) }1 D2 x8 s; M3 f5 |
0 R! ? q* O v. R- VTCP 80 (www)7 M0 f! z& c) U- h- A+ R4 a) J
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)! J/ e' ?; k7 G8 {$ I* ]8 h
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.0 I& R1 [9 ^6 o* E/ W1 b2 g
% s5 \7 n1 h2 F! f. ETCP 6667 (ircd)
0 I8 W, H& W; s9 gCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server. l0 E1 M/ M3 f/ C: l
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TCP/UDP 135-139 (dcom and netbios), a8 O4 P5 R. D1 {6 C7 W1 k
These ports are commonly exploited by worm viruses:
# q7 z$ M: S9 q! U; P135 Windows RPC4 I4 g7 d8 Y% V( z1 D/ o6 ^
136 PROFILE Naming System (basically unused)
! V- `/ ~- r# A# G+ L137-139 Windows NetBios3 s7 E1 b, U8 b/ A' B) {! A/ T
, R8 j) n3 u. {3 o5 z8 |. sTCP/UDP 445 (ms-ds)$ k3 {7 `6 P0 f5 i; S1 Q: D# w
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.9 @2 Z2 q) ]' X% o& N
C5 O" P$ z6 dTCP/UDP 1433-1434 (ms-sql)
& W% j2 w Q- Y/ a9 wMicrosoft 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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