Re: [exim] Missing E-mail

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Autor: Torry Crass
Data:  
A: exim-users
Assumpte: Re: [exim] Missing E-mail
The weirdest thing out of that information right now is that I have turned
off "ALL" filtering, including iptables.

lyra:~# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination


Chain FORWARD (policy ACCEPT)
target     prot opt source               destination


Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination


And I did that before sending my last message... So anything that I 'might'
have been blocking should have been allowed through with that. That's so
weird, I wouldn't expect my co-lo host to be firewalling anything above me,
that would be...kind of retarded of them, but stranger things have happened
I'd imagine. But I decided to run just a hypothetical traceroute back the
other way on those addresses.

lyra:~# traceroute 202.7.0.1
traceroute to 202.7.0.1 (202.7.0.1), 30 hops max, 40 byte packets
1 69.30.204.73 (69.30.204.73) 0.599 ms 0.480 ms 0.420 ms
2 69.30.235.45 (69.30.235.45) 1.144 ms 1.088 ms 2.436 ms
3 69.30.235.1 (69.30.235.1) 1.532 ms 1.703 ms 1.061 ms
4 69.30.235.210 (69.30.235.210) 1.536 ms 1.691 ms 1.279 ms
5 *

And a trace to one of the places having issues sending me mail:

lyra:~# traceroute bakeru.edu
traceroute: Warning: bakeru.edu has multiple addresses; using 10.1.254.128
traceroute to bakeru.edu (10.1.254.128), 30 hops max, 40 byte packets
1 69.30.204.73 (69.30.204.73) 0.548 ms 0.438 ms 0.416 ms
2 69.30.235.45 (69.30.235.45) 1.518 ms 1.069 ms 1.011 ms
3 69.30.235.1 (69.30.235.1) 6.242 ms 1.064 ms 1.006 ms
4 69.30.235.210 (69.30.235.210) 1.579 ms 1.305 ms 1.228 ms
5 * *

To me that seemed a bit like a block since it didn't even jump to the next
network and I'm fairly sure that the adjacent network is not the end-point
since the other traceroutes turned out something like this:

lyra:~# traceroute 203.211.0.1
traceroute to 203.211.0.1 (203.211.0.1), 30 hops max, 40 byte packets
1 69.30.204.73 (69.30.204.73) 0.507 ms 0.461 ms 0.413 ms
2 69.30.235.45 (69.30.235.45) 1.420 ms 1.190 ms 1.446 ms
3 69.30.235.1 (69.30.235.1) 15.555 ms 1.088 ms 0.995 ms
4 69.30.235.210 (69.30.235.210) 1.356 ms 1.192 ms 1.146 ms
5 rrcs-67-53-162-197.west.biz.rr.com (67.53.162.197) 2.214 ms 2.006 ms
1.566 ms
6 gig1-0-6.kscymordc-rtr1.rdc-kc.rr.com (24.94.160.41) 1.635 ms 1.957 ms
1.561 ms
7 so5-1-1-CHCGILL3-RTR1.kc.rr.com (24.94.160.81) 12.833 ms 12.773 ms
12.994 ms
8 xe-9-1-0.edge1.Chicago2.Level3.net (4.71.248.1) 12.405 ms
xe-11-2-0.edge1.Chicago2.Level3.net (4.71.248.13) 12.623 ms
xe-9-1-0.edge1.Chicago2.Level3.net (4.71.248.1) 12.499 ms
....

Apparently it might not be a configuration issue on my end after all. That
would be nice. I do appreciate the help greatly, if anyone has any other
insight, by all means let me know. Thanks!

~Torry


-----Original Message-----
From: exim-users-bounces@??? [mailto:exim-users-bounces@exim.org] On
Behalf Of Ted Cooper
Sent: Saturday, March 29, 2008 2:53 AM
To: exim-users@???
Subject: Re: [exim] Missing E-mail

Torry Crass wrote:
> Well crap... That's kind of what I've been afraid of was that my issue
> with mail "may" be DNS related. What I don't understand is why it's
> not working for you when it works for me. The only thing that I have
> presently set up on the machine is iptables...maybe I've got something set

up wrong there.
> I'll turn it off and if you could run the same test I'd appreciate it.


I'd say you've firewalled out large sections of the internet. I can access
your server from only 6/9 locations/data centers. The other locations get
their packets dropped on the cold cold ground.

125.254.X.X yes
203.194.X.X yes
125.255.X.X no
202.7.X.X no
203.211.X.X no
203.221.X.X yes
210.193.2.X yes
218.214.X.X yes
121.210.X.X yes

I can't really spot a pattern in that lot. Do you drag in an iptables drop
list from somewhere? Or are you dropping packets based on some obscure IP
flags?

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