Security Basics mailing list archives
RE: question about Microsoft vpn or alternatives
From: "Gregory M. Brown" <gbrown () alvalearning com>
Date: Tue, 14 Oct 2003 13:29:36 -0600
Be sure to verify that within the properties of the VPN connectoid that the client for microsoft networks is there. This error is indicative of that piece missing. I'm assuming you have only one user that is having issues. If only one user is having a problem, you can also check to insure that he has dial in permission via AD or User Mangler in NT4. gb -----Original Message----- From: M. Lucas [mailto:m.lucas () taos-it nl] Sent: Monday, October 13, 2003 12:31 AM To: Johnny Tam Cc: security-basics () securityfocus com Subject: Re: question about microsoft vpn or alternatives On Fri, 2003-10-10 at 17:38, Johnny Tam wrote:
Hello all I have a windows 2000 server configured for VPN (PPTP) and Terminal Services App Mode. Everything is working on the server and there has been no problem with ports being blocked, etc since it is directly connected to the internet. I have a remote client that cannot connect to the vpn server. It only goes until Verifying Password and then just gives out an error 721. From my initial testing on why this "could" happen. I found out that the client is not directly connected to the internet although he has a real IP 10.xxx.xxx.xxx. By that, I mean he goes through at least one or two nodes up him that could possibly filter a lot of ports. Even ICMP (ping) inbound and outbound is prohibited, you just get a request timed out all the time but internet surfing etc is working ok. If you do a traceroute from tracert, it would end up until 15 zzz.CUSTOMER.DSL.ALTER.NET (66.66.66.66) 233.526 ms 235.943 ms 239.454 ms 16 * * * 17 * * * 18 * * * (ip modified for privacy) If I request those nodes above him to allow ICMP, would that help? or NAT problem? Are there any alternative VPN solution I can use that won't have this kind of problem? How is Cisco's implementation of VPN? Thank you for any helpful information
Take a look at his firewall and search for allowing GRE traffic. I had the same issue this weekend ;) Maurice Lucas ------------------------------------------------------------------------ --- ------------------------------------------------------------------------ ---- --------------------------------------------------------------------------- ----------------------------------------------------------------------------
Current thread:
- question about microsoft vpn or alternatives Johnny Tam (Oct 10)
- Re: question about microsoft vpn or alternatives M. Lucas (Oct 14)
- Re: question about microsoft vpn or alternatives Ivan Hernandez (Oct 14)
- <Possible follow-ups>
- RE: question about Microsoft vpn or alternatives Gregory M. Brown (Oct 14)