Problem with SMTP service

Problem with SMTP service

Post by Ivan Ko » Fri, 07 Sep 2001 13:54:14



Hi,
I have this problem and hope someone would be able to advise what I can do.

I am currently migrating my network from a illegal intranet address into a
legal intranet address at 172.28.x.x
The problem I am facing is that I am able to ping the mail server on this
network but not able to access port 25. A client on the illegal intranet
subnet is able to access this server but not a client on the legal subnet.
Both client can ping the server and the SMTP service is OK.

My OS is Solaris 8 for the Mail Server. Is there any issue on the OS? Any
patch?

Any help appreciated.

Thanks.
Ivan Koh

 
 
 

Problem with SMTP service

Post by Ivan Ko » Fri, 07 Sep 2001 15:47:19


Hi,
The following is the ifconfig -a result on my mail server and the traceroute
result from mail server to the two clients.

lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 172.28.9.237 netmask ffffff00 broadcast 172.28.9.255
        ether 8:0:20:e6:b8:9e

** Not working Subnet **
traceroute to 172.28.50.193 (172.28.50.193), 30 hops max, 40 byte packets
 1  172.28.9.230 (172.28.9.230)  0.870 ms *  0.794 ms
 2  168.10.1.210 (168.10.1.210)  1.539 ms  1.360 ms  1.301 ms
 3  172.28.50.193 (172.28.50.193)  1.073 ms  1.162 ms  0.985 ms

** Working Subnet **
traceroute to 168.10.7.3 (168.10.7.3), 30 hops max, 40 byte packets
 1  172.28.9.230 (172.28.9.230)  0.871 ms *  0.755 ms
 2  168.10.1.210 (168.10.1.210)  1.577 ms  1.315 ms  1.316 ms
 3  168.10.7.3 (168.10.7.3)  1.045 ms  1.088 ms  1.285 ms

As can be seen able, my mail server is in 172.28.9.237. The gateway is
172.28.9.230
The funny thing here is that I am not able to access the SMTP service from
any legal Intranet address (10.0.0.0, 172.16-32.0.0, 192.168.0.0) This
happens even if my client is on the same subnet as the mail server
(172.28.9.0) It seems to me that there is a time-out issue when I am
accessing port 25 from these addresses. All other address gives me a almost
immediate kind of establish connection.

Any idea.

Thanks.
Ivan Koh



> #   Hi,
> #   I have this problem and hope someone would be able to advise what I
can do.
> #
> #   I am currently migrating my network from a illegal intranet address
into a
> #   legal intranet address at 172.28.x.x
> #   The problem I am facing is that I am able to ping the mail server on
this
> #   network but not able to access port 25. A client on the illegal
intranet
> #   subnet is able to access this server but not a client on the legal
subnet.
> #   Both client can ping the server and the SMTP service is OK.
> #
> #   My OS is Solaris 8 for the Mail Server. Is there any issue on the OS?
Any
> #   patch?

> Could you gather more info, 'ifconfig -a', traceroute, etc
> and post it?