Date: Wed, 27 Aug 2003 13:20:53 -0400 From: "fbsd_user" <fbsd_user@a1poweruser.com> To: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@FreeBSD.ORG> Subject: Problem with Adelphia connection Message-ID: <MIEPLLIBMLEEABPDBIEGIEFAEEAA.fbsd_user@a1poweruser.com>
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I have been running an FBSD gateway with a local lan behind it containing 2 ms/windows boxes, the gateway connects to Adelphia ISP over cable and has been working for the past 18 months without any problems. Adelphia's email system was taken offline last Sunday to address the new virus which attacks ms/windows boxes and has been in the news. Today Wednesday when I booted FBSD gateway I no longer have lan access to public internet. From the FBSD gateway box I can ping IP and domain names, I can also use lynx browser to pull up web sits. I use IPFILTER firewall and added temp rules to (pass quick log) everything so I can get ready-trace of all packets passing through gateway. I see LAN PC packet come into IPF get nated and then pass out to public internet, which is really going to ISP for pass through to public internet. I see no responses returning from public internet for nated Lan pc's packets. But anything originating from gateway does get responses returning from public internet. >From the Lan PC's I can telnet & FTP into gateway box just fine, I can also pull up my personal web sit running on Apache in the gateway box just fine. The lan works fine locally. When I cable Adelphia's cable modem directly to MS/windows box, I get connected to internet ok and everything works as expected. It looks like Adelphia has activated some kind of new filter to deny Nated packets. I thought the Nated packet did not carry any info in it that could identify it as having been Nated after leaving the gateway box. Has any body experienced this? Any help in the area of how to further debug this problem would be appreciated?
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