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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [FW-1] DNS Question
We allow DNS over UDP only and have not had any problems. Don, can you give us a reference/RFC for these large DNS requests over TCP? I find nothing about it, it is my understanding that only zone transfers use TCP. -----Original Message----- From: Don [mailto:[email protected]] Sent: Thursday, May 02, 2002 8:08 AM To: [email protected] Subject: Re: [FW-1] DNS Question > 53-TCP is used for zone transfer should be secured 53-UDP can be open to > all. TIP. This is not correct. Please read my post below. -Don > >>>After all the IPSO upgrades and service pack upgrades for our > >>>Nokia/Checkpoint 4.1 SP5a solution, we started seeing some random > >>>results with our DNS servers. Sometimes, it would fail on the first > >>>lookup - but after that it would be ok... my question is simple... for > >>>the last several years we've had the simple 2 rules for our DNS Servers: > >>> > >>>1. Any (Source) DNSServers(Destination) DNS-53(Port) > >>>2. DNSServers (Source) Any (Source) DNS-53 (port) > >>> > >>>The question is simple...are we missing something obvious??? Our DNS > >>>servers are Windows 2000. > >>> > >>When you say DNS-53, do you mean UDP or TCP? You need to allow both in > >>order for DNS to function properly. Most DNS requests use UDP port 53, > >>however larger requests use TCP port 53. It may be these larger requests > >>that are failing. > >> > >>-Don ================================================= To set vacation, Out Of Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] ================================================= ================================================= To set vacation, Out Of Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] =================================================
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