Date: Thu, 04 Dec 2003 14:34:31 -0000 From: Garry Hill <garry@ascii-turf.net> To: questions@FreeBSD.org Subject: can ping, can't download through firewall Message-ID: <r02000200-1028-F5E38C46266611D8A15B000393AD14A8@[10.0.1.10]>
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hi, i'm a reasonably experienced linux/bsd user - i've installed a few boxes in my time and usually with a good level of success. but this time i'm stumped. i'm trying to set up a freebsd gateway to share my cable modem connection. from the gateway itself i can ping the world, from the attached clients i can ping the world, i can even do dns lookups. doing: curl --head http://www.website.com gives me a good-looking header and everything, but if i do lynx http://www.website.com no joy. i get: HTTP request sent; waiting for response. and it stops there. this is true from both the clients and the gateway itself. i just can't download anything for all the pings in the world. my current set up is -- kernel config: options IPFIREWALL options IPDIVERT options IPFIREWALL_DEFAULT_TO_ACCEPT options IPFIREWALL_VERBOSE options IPFIREWALL_VERBOSE_LIMIT=10 -- /etc/rc.conf gateway_enable="YES" firewall_enable="YES" firewall_type="OPEN" natd_enable="YES" natd_interface=" rl0" natd_flags="" which are both straight out of the handbook. -- ipfw -a list 00050 1844 130026 divert 8668 ip from any to any via rl0 00100 96 11166 allow ip from any to any via lo0 00200 0 0 deny ip from any to 127.0.0.0/8 00300 0 0 deny ip from 127.0.0.0/8 to any 65000 2481 200907 allow ip from any to any 65535 0 0 allow ip from any to any ethernet cards - a pair of 8139's - rl0 external, rl1 internal. as far as i can tell they work fine. i've tried the same thing using ipfilter and ipnat instead of natd and ipfw - with the same results. i've noticed that if i turn on the firewall my pings to the isp's router are much much less reliable, sometimes losing 30%+ of the packets but generally degraded compared to the setup with no firewall enabled. the firewall stats show that everything is passing ok. i really don't know what's going on. unfortunately my web searches have turned up nothing similar. does anyone have any ideas/comments/suggestions/experience of the same? is it the network cards? pings from the client machine when connected directly work perfectly but from the gateway are at best a little dodgy - losing 15% of the packets. any help greatly appreciated. Garry
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