On September 9, 2003 07:03 am, Peter Marshall wrote: > That is a good suggestion as well .... but the mail worked before I > installed the firewall. .... > I am coming up at a bit of a loss ... > > I checked the logs last night. When I try to send or receive mail I get an > error saying can't connect to the pop or smtp servers, but there is no > entry in the firewall log for the error ( and as far as I can tell .. I am > logging everything ..). If you are "logging everything": can you see the mail client attempting to resolve the hostnames of the pop and smtp servers? Do you run a DNS? --> yes you can surf thus the XP box *should* be resolving names correctly --- but if you are running a DNS of your own, does it forward first to your ISP's DNS? --- some isp's use names that are only resolvable within their own IPspace for mail servers... You say "can't connect" -- or "can't find" === thats why I ask. There are further issues after that which are dependent on your ISP's methodologies .... but I'd suspect that first... > > ----- Original Message ----- > From: "George Vieira" <georgev@xxxxxxxxxxxxxxxxxxxxxx> > To: "Peter Marshall" <peter.marshall@xxxxxxxxx> > Sent: Monday, September 08, 2003 7:50 PM > Subject: RE: email through firewall > > > Try changing the MTU of the firewalls outgoing packets. You will probably > > find that the firewall has no problem with mail but your workstations do.. > this is because the MTU is too large for your ISP.. drop it and try again.. > > > search google.com for +MTU +iptables > > > > -----Original Message----- > > From: Peter Marshall [mailto:peter.marshall@xxxxxxxxx] > > Sent: Tuesday, September 09, 2003 1:31 AM > > To: netfilter@xxxxxxxxxxxxxxxxxxx > > Subject: email through firewall > > > > > > Has anyone had problems receiving email from there ISP through their > > firewall ? > > > > I have a pretty basic firewall with 2 nic cards. On the inside of my > > network I have a windows xp machine with outlook 2k. > > All of my firewall rules seem to be working and I can browse the net / > > telnet from inside the firewall to the internet. > > > > For some reason when I try to receive mail, the mail client ( outlook 2k) > > can not find the pop or smtp servers. > > > > Any suggestions would be appreciated. > > > > Thanks > > Peter -- Alistair Tonner nerdnet.ca Senior Systems Analyst - RSS Any sufficiently advanced technology will have the appearance of magic. Lets get magical!
