[cs615asa] hw4 security groups

[John Wierzchowski]

sorry -F is an input file flag, so disregard that silly question :)

On Fri, Apr 8, 2011 at 5:25 PM, John Wierzchowski <jwierzch at stevens.edu>wrote:

> not sure, ill let you know how its working for me later tonight. (maybe
> open it up an all ports to all ips and see if it works...)
>
> on a unrelated note, is anyone having issues with tcpdump writing to a
> file? when i give it the -F flag it doesn't filter traffic (i see my
> ssh connection spam to the terminal, and the file stays blank :(
>
>
> On Fri, Apr 8, 2011 at 4:17 PM, Javed Akhtar <jakhtar at stevens.edu> wrote:
>
>> Yes I added a SMTP rule (with Steven’s mail IP address i.e. 155.246.14.12)
>> to the security group I am using,
>>
>> do you think we need to add more rules to make it work?
>>
>>
>>
>> Thanks & Regards,
>>
>> Javed Akhtar
>>
>> 732-552-6243 - M
>>
>>
>>
>> *From:* cs615asa-bounces at lists.stevens.edu [mailto:
>> cs615asa-bounces at lists.stevens.edu] *On Behalf Of *John Wierzchowski
>> *Sent:* Friday, April 08, 2011 4:08 PM
>>
>> *To:* CS615A - Aspects of System Administration
>> *Subject:* Re: [cs615asa] hw4 security groups
>>
>>
>>
>> do you allow inbound traffic on those ports to your instance? Just
>> something to check...
>>
>> On Fri, Apr 8, 2011 at 4:06 PM, Javed Akhtar <jakhtar at stevens.edu> wrote:
>>
>> Dear Professor,
>>
>> Earlier I was just testing the 'mail' command if its working on my
>> instance
>> or not, so I tried it without using telnet.
>>
>> As per the assignment I tried telnet later, first I tried port number 25
>> which is the default port for SMTP protocol, I got a connection time out
>> error
>>
>> telnet nexus.stevens.edu 25
>> Trying 155.246.14.12...
>> telnet: Unable to connect to remote host: Connection timed out
>>
>> Then, I changed the port to 587 since Steven's mail server works on port
>> 587
>> as stated in ITWIKI page. But that also didn't work. Below I am mentioning
>> all what I tried.
>>
>> telnet nexus.stevens.edu 587
>> Trying 155.246.14.12...
>> Connected to nexus.stevens.edu.
>> Escape character is '^]'.
>> 220 nexus.stevens.edu ESMTP Postfix
>> mail from: jakhtar at stevens.edu
>> 250 2.1.0 Ok
>> rcpt to: jakhtar at stevens.edu
>> 554 5.7.1 <ec2- <http://ec2-50-17-124-180.compute-1.amazonaws.com>
>> 50-17-124-180.compute-1.amazonaws.com[50.17.124.180]>: Client
>> host rejected: Access denied
>>
>> I'd really appreciate your valuable suggestion & help in this regard.
>>
>>
>> Thanks & Regards,
>> Javed Akhtar
>> 732-552-6243 - M
>>
>> -----Original Message-----
>> From: cs615asa-bounces at lists.stevens.edu
>>
>> [mailto:cs615asa-bounces at lists.stevens.edu] On Behalf Of Jan Schaumann
>> Sent: Friday, April 08, 2011 9:03 AM
>> To: cs615asa at lists.stevens.edu
>> Subject: Re: [cs615asa] hw4 security groups
>>
>> Javed Akhtar <jakhtar at stevens.edu> wrote:
>>
>> > I am facing one problem regarding the SMTP part of assignment. When I
>> > am trying to send email from one of the instance using the program
>> 'mail'
>>
>> You should not use the 'mail' program.  You should use telnet to port 25
>> and
>> issue the SMTP commands yourself.
>>
>> > Also, I got an email from AWS saying that I reached a limit on the
>> > volume of email that I can send out of SMTP port 25 on my instance.
>> > Does that mean, I am actually able to send emails from my instance but
>> > the SMTP port is blocked at Stevens so I am not able to receive those
>> sent
>> emails?
>>
>> Sounds like Amazon throttles outbound mail per instance to prevent
>> spamming.
>> Try to shut down the instance and create a new one.
>>
>> -Jan
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