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之前发过一个帖子有关Telus, Shaw 的比较,
6 M; K& P& i5 a6 ~$ l( m. t3 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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3 o) z" a, _- i9 I) ], \1 P3 F& iDoes Telus block any ports? & ]. i+ S6 b+ j- M8 P
]' `/ N: a" V! pThe 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)! z6 i+ K( M; `" {
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)7 D4 s F" _% c b
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)$ L* y! E- U! F% z
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)
8 P/ [) a0 C; h% H* B% x" ICustomers 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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4 W D4 Q% p7 H5 J% T0 y7 P& P% ETCP 6667 (ircd)
2 a0 E; e5 T5 T1 }* t8 D% d# W$ eCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.$ j1 |: v; D6 r+ _% z/ K
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TCP/UDP 135-139 (dcom and netbios)( J2 i) G, p+ f8 Q# @
These ports are commonly exploited by worm viruses:
. |# |& a f+ j! Z) [! N135 Windows RPC
3 n* N) S$ V! J9 ?$ [: ~! B0 \! ` l; {136 PROFILE Naming System (basically unused)
0 v( `+ L$ {5 S7 f137-139 Windows NetBios( v4 {/ }# N* }8 H2 [
3 V4 p2 Y7 N: ITCP/UDP 445 (ms-ds)1 n; ~8 N4 _3 h( g' f
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.. n* r$ U% [# O' b K6 }* l+ x
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TCP/UDP 1433-1434 (ms-sql)
) l! S2 J" v. x) OMicrosoft 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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