On Sat, Feb 20, 1999 at 04:32:59PM -0800, Gregory Margo wrote:
>
> Problem: can't get to certain web sites from masqueraded host.
>
> I have a pretty basic IP Masquerading setup, with one Windows 98 machine
> masqueraded behind a Linux 2.0.33 box. The Linux box runs diald & PPP
> with a dynamic address to the internet. The two machines are connected
> via ethernet with the usual 192.168.1.[12] addresses.
>
> The firewall rules are only the most basic:
> ipfwadm -F -p deny
> ipfwadm -F -a masquerade -S 192.168.1.0/24 -D 0.0.0.0/0
>
>
> Most things work. HTTP (to most sites), FTP, etc.
>
> However, I can't get to certain web sites from the Windows box,
> using either Netscape or Internet Explorer.
>
> One particular site is http://www.schwab.com.
>
> What could cause this? How can I debug it?
I was using an MTU and MRU of 576 on the PPP link. I tried changing
those to unspecified, it defaults to 1500; now the Schwab web site works.
However, I perfer 576 for interactive responsiveness.
Has anyone else observed similar problems with packet fragmentation/reassembly?
Is there any way I can use 576 instead of 1500?
thanks,
gm
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Gregory H. Margo
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