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之前发过一个帖子有关Telus, Shaw 的比较,
( a9 r5 | C4 S7 f }1 |5 f' e4 v+ u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。' u3 A' W" K4 k2 q; N+ A- W5 G& u
s5 @- [( ~2 ~- y; I; e( gDoes Telus block any ports? 5 r1 L% F& I+ U
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)+ c, W( W( E o% O6 Z
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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- G+ d. J* l! p0 [/ nTCP 25 (smtp)1 c7 z1 o' e0 O; v9 W+ J
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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TCP 80 (www)0 J/ n" | R8 l0 d! y5 \2 n- ~
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.6 x$ t) t6 i' T% s
5 ]. i; ?* g3 [& k; s+ jTCP 110 (pop3)
# k" O# I& W& z2 {3 kCustomers 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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* k+ G. p# r& K4 s! T5 ~* gTCP 6667 (ircd)
$ T9 Q- H; |2 z/ t L( [/ O0 ~8 kCustomers 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)
! k7 A& R9 @5 d; _& lThese ports are commonly exploited by worm viruses:. p8 \, J F9 F. ?
135 Windows RPC
2 O3 P" ?* P' Y' |136 PROFILE Naming System (basically unused)
w: d4 x; |8 ^. \# e137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
' Y. y2 b9 k$ D/ o7 p3 k$ yMicrosoft 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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3 M2 P! v+ I- t' D* t- pTCP/UDP 1433-1434 (ms-sql)* {- e! I, |6 k0 i: k9 T; v
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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