Nmap Development mailing list archives
Re: [updated patch] fragment scan got broken between 3.50 and 3.75
From: Martin Mačok <martin.macok () underground cz>
Date: Sun, 30 Jan 2005 19:12:33 +0100
On Sun, Jan 30, 2005 at 02:35:18PM +0300, Andrey A. Tutolmin wrote:
MM> Can FreeBSD send tiny fragments (mtu=20+8)? Could you check it with MM> hping2 or some other tool/lib?
I've just read through man on ipfw and found out that: There is one kind of packet that the firewall will always discard, that is a TCP packet's fragment with a fragment offset of one. This is a valid packet, but it only has one use, to try to circumvent firewalls. When logging is enabled, these packets are reported as being dropped by rule -1. So that is why I've been getting this permission denied messages. I turned off firewall complitely: sysctl -w net.inet.ip.fw.enable=0
Thank you for bringing this issue up.
Everything works fine right now.
Good news! Martin Mačok ICT Security Consultant --------------------------------------------------------------------- For help using this (nmap-dev) mailing list, send a blank email to nmap-dev-help () insecure org . List archive: http://seclists.org
Current thread:
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 11)
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- Re: [updated patch] fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 29)
- Message not available
- Re: [updated patch] fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 30)
- Re: [updated patch] fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 29)
- Message not available
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Fyodor (Jan 30)
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 31)
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 31)
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Martin Mačok (Feb 01)
- patches against 3.81 Martin Mačok (Feb 07)
- Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75 Martin Mačok (Jan 31)