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Conference noted::seal

Title:	SEAL

Moderator:	GALVIA::SMITH

Created:	Mon Mar 21 1994
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1989
Total number of notes:	8209

1803.0. "Telnet very, very slow" by LISVAX::CORREIA_C (CELIA CORREIA @XIP) Mon Feb 17 1997 16:31

 
 When I try to telnet to internal interface of the alta vista firewall 
I receive a very, very slow answer. The same happens if I try to telnet 
to any machine on the external (red) network.

 Does anyone know why this happens ?

 This happens with Digital UNIX V4.0A and Alta Vista Firewall for UNIX V2.1.
 It also happens with Digital UNIX V3.2C and AVFU V2.0.

 Many thanks in advance.

 Celia

T.R	Title	User	Personal Name	Date	Lines
1803.1		BIGUN::nessus.cao.dec.com::Mayne	Wake up, time to die	`Mon Feb 17 1997 17:00`	3
	Your DNS is misconfigured. PJDM
1803.2	Telneting IP address	LISVAX::CORREIA_C	CELIA CORREIA @XIP	`Tue Feb 18 1997 14:08`	10
	> your DNS is misconfigured Even if I'm just telneting the ip address (instead of the fully qualified name) ? Thanks in advance C�lia
1803.3	Telnet ok, but ...	LISVAX::CORREIA_C	CELIA CORREIA @XIP	`Tue Feb 18 1997 15:33`	12
	After setting up DNS everything worked well. Thank you. Still, I don't understand the relation between DNS and telnet, when I use IP addresses (telnet x.y.z.c) instead of DNS names. Is DNS always necessary for the telnet proxy ? Or is it necessary for screend ? C�lia
1803.4		BIGUN::nessus.cao.dec.com::Mayne	Wake up, time to die	`Tue Feb 18 1997 17:23`	4
	Even if you telnet using the numbers, the system will try and do a reverse lookup on the address. If DNS isn't set up properly... PJDM
1803.5	Telnet very slow	LISVAX::CORREIA_C	CELIA CORREIA @XIP	`Thu Feb 20 1997 05:35`	45
	And what he does when the address is outside his domain ??, he will ask the secondary external server ?? I'm making this question for one reason, this particular configuration in one client , for intalling the firewall : Node1 node2 ------- ! !WWW server Internet ------- ! !DNS Primary server router ! ! ------- ------ ! ! ------------------------------------------------------ ! node3 -------- ! !Firewall ! ! ------- ! ------------------------------------------------------ !node4 !node5 -------- -------- ! !DNS server Internal ! ! ! !mailhub internal ! PC ! ------- -------- Now I can telnet ftp the internal firewall interface, but when the pc asks for an external internet address it can't solve and becames very slow. In the firewall configuration I put the secondary external server as the node 1 (as in the picture). I have the internal dns server properly (with forwarder pointing to the firewall , the slave is in the named.boot ) Is somthing missing ?? from the pc I even can't telnet the node2 (the internet router ) but the response is imediate if I trie from the firewall .... Many thanks in advance for you replies, C�lia
1803.6	red hosts in your domain	NETRIX::"[email protected]"	Sebastian L�lsdorf	`Thu Feb 20 1997 09:34`	14
	Hello Celia! If I'm understanding you right, the problems only occur when you are trying to telnet from the bluenet to systems on your rednet? I assume your rednet has the same DNS domain name as the bluenet? In this case, your internal DNS server will not make any use of its forwarders line, since it feels authoritative for the domain! Therefore you must enter all your red hosts of your domain into the internal DNS database files too. Does that help? Sebastian [Posted by WWW Notes gateway]
1803.7	Telnet very,very slow	LISVAX::CORREIA_C	CELIA CORREIA @XIP	`Thu Feb 20 1997 11:00`	13
	Hi Sebastian, You are rigth, and I've donne that, but my problem was that I could'nt resolve any dns address outside my domain, and finally I find out the real cause on this was that one router :-( didn't allow queries from the firewall, only from other previous dns server machine. Finaly everything works now ..... ;-) Many thanks to all , for your most precious help C�lia