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之前发过一个帖子有关Telus, Shaw 的比较,
- a& z, ~) T) W: v8 x% 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。( d6 Z1 `& t/ {7 X8 ~4 Q: t
! G3 o( u$ U h7 w& Y) a1 ?; p% n3 eDoes 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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" V. [0 v' w, I, cThe Blocked ports currently are:
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& h* ~1 S; j! Q* STCP 21 (ftp)
0 C! `, x& z' JCustomers 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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9 j" Y& s F# y* \% ~. XTCP 25 (smtp)
4 _* |) r0 ? UCustomers 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)4 `( k* U; M& p* W
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.$ r0 d, o$ ~% n; u( X: U* i
0 `# e' c" \6 ~8 gTCP 110 (pop3)$ R D/ Y3 ], T9 Q: a u
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.
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T* K6 a- b5 _1 C( z) aTCP 6667 (ircd)
- ?8 d! [8 e, Q5 R' qCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.. y2 F3 S" O- z9 \6 S
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TCP/UDP 135-139 (dcom and netbios)" I( V: X+ Z: V2 L3 r& T" m; i# Y" N
These ports are commonly exploited by worm viruses:2 o" V/ o3 S5 d* b
135 Windows RPC
+ `$ L+ F; I7 F- \' m$ b5 u! q136 PROFILE Naming System (basically unused)4 S; V2 h0 q" F% ^* w4 W4 V5 u
137-139 Windows NetBios: ]- _% u5 s- e, ~0 U# M0 c4 m8 T
0 @7 r( a2 B4 _8 X9 Q; cTCP/UDP 445 (ms-ds)
" w/ ` v( n7 Y( O. JMicrosoft 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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TCP/UDP 1433-1434 (ms-sql)
1 L( U) o, [5 A3 q* DMicrosoft 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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