Wireshark mailing list archives
Re: SMB problems when ICMP is blocked?
From: Andrew Hood <ajhood () fl net au>
Date: Mon, 08 Mar 2010 08:06:23 +1100
Jens Link wrote:
Andrew Hood <ajhood () fl net au> writes: <rant>Solved on Windows by forcing the MTU to 1492. This is a global setting for all interfaces.Manually changing the MTU might lead to other problems. An how low to you want to the MTU? There might be tunnels, etc. involved which might lower the MTU even further.
Given the environment that is unlikely, but if it happens the MTU will change again. Anyone for gigabit ethernet running 576 byte MTUs? I don't like doing it this way but the paranoid run the security department and will not listen to the voice of reason. Add the facts that there are multiple service owners in the network path (who will blame each other) and a customer to satisfy, a working solution beats an unwinable fight any day.
Doing it the right way and having security allow the MTU exceeded? Not a hope in hades. Paranoia rules.Only Idi^w clueless people drop ICMP completely. It breaks TCP. Yes you can fix around this problems but doing so will most probably cause other problems. I hope these people will also block ICMPv6 completely as well. This way they'll have no connectivity at thus will cause no problems for the rest of the world.
You are preaching to the choir Jens. Once upon a time someone told security a fable about all ICMP being the tool of evil hackers. They believed it. IPv6 won't affect this network unless IPv4 is deleted by M$ from all versions of the Windows stack. -- There's no point in being grown up if you can't be childish sometimes. -- Dr. Who ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- SMB problems when ICMP is blocked? Feeny, Michael (GWMT-TASCS) (Mar 04)
- Re: SMB problems when ICMP is blocked? Martin Visser (Mar 05)
- Re: SMB problems when ICMP is blocked? ronnie sahlberg (Mar 05)
- Re: SMB problems when ICMP is blocked? Andrew Hood (Mar 06)
- Re: SMB problems when ICMP is blocked? Jens Link (Mar 07)
- Re: SMB problems when ICMP is blocked? Andrew Hood (Mar 07)
- Re: SMB problems when ICMP is blocked? Jens Link (Mar 07)
- Re: SMB problems when ICMP is blocked? Feeny, Michael (GWMT-TASCS) (Mar 12)
- Re: SMB problems when ICMP is blocked? Andrew Hood (Mar 06)