cant connect to pop3s server or otrs.org

[MJEB]

Hi all,

I run an appliance install on a linux server, version 3.3.10

the server seems to be running fine except on the dashboard i get the following errors;

Can't connect to: http://otrs.org/product.xml (500 Can't connect to otrs.org:80 (Bad hostname))

and

Can't connect to http://www.otrs.com/en/rss.xml

I also get the following error in the syslog every 5-10 mins

POP3S: Can't connect to ***.***.*.*** (replaced my mail server's ip with asterisks)


any ideas?

[MJEB]

Also one thing I forgot to mention,

I would like if possible the server to recognize and be able to ping other servers (i.e the mail server) using an address, rather that an ip address, so something like servername.domainname.local rather that 192.168.*.*

[crythias]

Chances are you need to address networking issues. Especially, if you're virtualizing the appliance, check network config for the vm for shared versus nat.

[MJEB]

I've tried pinging outside the firewall and I get responses, and I have pinged inside the firewall and get responses so that's not the issue.


Can you please explain what you mean by shared vs NAT?

[crythias]

shared vs NAT

By default, if you're using a VM, chances are your VM Guest network setting is NAT, and might need to be configured to shared.

But if you're having domain resolution issues, that's DNS.
If you're having port issues, that's firewall or endpoint IP permissions settings.

[MJEB]

I tried to ping otrs.org from the appliance and it comes back with unknown host.

However I tried to ping our dns server and that got a reply.

I pinged otrs.org on another machine and got through fine, so I used the ip it gave me on the appliance and also got a reply so I have no idea whats going on anymore.

[crythias]

yes, if you can ping by IP but not by name, you have a dns issue. edit /etc/resolv.conf or dhcp isn't getting DNS.

[MJEB]

Thankyou

I tried running the command edit etc/resolv.conf

But it came back with insufficient permissions. out of curiosity I did chmod -a=rwx resolv.conf,
But when I ran the first command again I get the same error.

[crythias]

/etc/resolv.conf isn't a command. Network assistance is outside the scope of this forum.

[zbigniew]

These commands will help you diagnose problems with network:

This one tests pop3s on port 995:
openssl s_client -connect mail.example.com:995

This one tests pop3s on port 110:
openssl s_client -crlf -connect mail.example.com:110 -starttls pop3

If you get timeout you are blocked on the network: firewall or no routing.
If you use IP adresses you do not need DNS and /etc/resolv.conf is ignored.
Check also default gateway using:
route | grep default
If it is bad change it with text editor at:
/etc/sysconfig/network-scripts/ifcfg-eth0
or
/etc/sysconfig/network

If you modify these files remember to do service network restart on Linux console on vmware window. Do not do this via putty or it will stuck in the middle.

[MJEB]

Thanks

So the DNS problem is now gone and out of the way (thanks again i was banging my head onto a wall for ages)

I still cant fetch mail.

Error details :
Backend ERROR: OTRS-CGI-43 Perl: 5.10.1 OS: linux Time: Mon Dec 15 09:15:00 2014 Message: POP3S: Can't connect to 192.168.1.156 RemoteAddress: 178.248.34.135 RequestURI: /otrs/index.pl?Action=AdminMailAccount;Subaction=Run;ID=1;ChallengeToken=GtEy4aYC4KGhqlBycFt3ryfknNyD4Pr7; Traceback (20253): Module: Kernel::System::MailAccount::POP3::Fetch (OTRS 3.3.10) Line: 127 Module: Kernel::System::MailAccount::MailAccountFetch (OTRS 3.3.10) Line: 427 Module: Kernel::Modules::AdminMailAccount::Run (OTRS 3.3.10) Line: 64 Module: Kernel::System::Web::InterfaceAgent::Run (OTRS 3.3.10) Line: 871 Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 41 Module: (eval) (v1.99) Line: 204 Module: ModPerl::RegistryCooker::run (v1.99) Line: 204 Module: ModPerl::RegistryCooker::default_handler (v1.99) Line: 170 Module: ModPerl::Registry::handler (v1.99) Line: 31

I tried to diagnose it using that but I cant figure out what this means?

any help is appreciated thanks again guys

[crythias]

POP3S might be port 995 and may not be open or allowed for the otrs server IP address. Check firewall and permissions at the mail server.

[MJEB]

Firewall looks like it might be fine, would I have to open port 995 on the otrs server itself or would the appliance install have done that for me?

[crythias]

The issue is likely between the otrs box and the mail server. Likely the mail server. But could be any point between.