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之前发过一个帖子有关Telus, Shaw 的比较, # p; h2 D1 ] D# y6 Z
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。6 f6 N7 _" e: ~9 l6 f
3 Z7 I" x* E9 }Does Telus block any ports?
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4 x) }. y: Z5 Z- _The only packages with no blocked ports at this time are the Server packages. $ Y e5 j/ Q4 L; j
9 Q6 r4 f# q6 G3 y6 d# QThe Blocked ports currently are:
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TCP 21 (ftp)/ m' T" n& I& r
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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# h' W# P+ h0 \9 x% k: e Q+ KTCP 25 (smtp)2 f( ]8 V9 I* u- {4 {5 ^$ T- X5 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.4 S; `/ l3 V: ?+ }$ N/ u- a
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TCP 80 (www)& C) P1 Z8 H) c
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.9 Q% z" W$ m3 D. M4 W. ?
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TCP 110 (pop3)
; a5 m9 x r7 c- C) Q* h! RCustomers 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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TCP 6667 (ircd)6 E! U( `/ [4 M" {7 T" A
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
/ |/ h. U% H6 J2 o- {4 W, i" l0 {These ports are commonly exploited by worm viruses:* s. W+ S9 d M) G- ?7 \
135 Windows RPC
; U& [4 p" w2 B( z. s136 PROFILE Naming System (basically unused)
k' x/ d* s: l! A9 Q+ O' l# d137-139 Windows NetBios
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1 X! e# X& V ?, E P% V( jTCP/UDP 445 (ms-ds)
: B* y2 }8 n9 B! 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., h: O5 X5 p1 H% A0 D, b& u
7 E8 b8 Y/ f( d _TCP/UDP 1433-1434 (ms-sql)
& H7 L3 N. E: ~( @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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