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之前发过一个帖子有关Telus, Shaw 的比较, : o" f$ D2 \3 R& X2 m" f$ o
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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Does Telus block any ports?
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}) L+ } K& W3 w& p# B5 O9 sThe only packages with no blocked ports at this time are the Server packages.
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7 `; e0 y1 Z) F3 R) z: N' QThe Blocked ports currently are:& ? v( G: U6 x7 m" i _/ h
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TCP 21 (ftp)
B% d7 J5 e3 D1 E7 F, D) wCustomers 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)) i/ i" h& u6 q
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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! P5 ~% X- b% z, i, i; c5 H& HTCP 80 (www)
- t) ^# A G! v. nCustomers 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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0 F% r/ X8 }5 cTCP 110 (pop3)# b/ q& f/ x2 g9 P5 O% 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.! i. T; Z; d1 u2 T, M; k
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TCP 6667 (ircd)( |8 t3 p4 O4 P% s" e" v# J9 m. u
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.6 Y& W0 ?9 R" _; i; ^* N, r* V! Z
& O% A1 C1 ~3 X# z0 a: W8 DTCP/UDP 135-139 (dcom and netbios)
7 E! o5 z! ?* P" B9 O$ E; PThese ports are commonly exploited by worm viruses:; T4 b$ C% C: M7 {* x
135 Windows RPC
; w9 X4 B* T- e2 b% V136 PROFILE Naming System (basically unused)7 _, E+ M' l0 _
137-139 Windows NetBios3 J/ H7 I0 B% S* \
0 I' v5 p( K% J: u7 g: M! uTCP/UDP 445 (ms-ds)
' a: r2 `. y+ g HMicrosoft 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.
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% M1 S/ B* A4 d9 X/ I/ {- i) j- T/ OTCP/UDP 1433-1434 (ms-sql) q) z5 Q$ j0 H
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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