Hi, I have a problem for sending of email for a server specify. Emails that sent for any another server in the Internet arrives ok. I tried to make telnet for door 25 of the destination server and conection is not opened. I am using shorewall 1.4.8, some ideia of that it can be happening? Best Regards, ++++++++++++++++++++++++++++++++++++++++ IURI PEREIRA SOUZA iuri@doctornet.com.br
The problem is probably with the server then, not with your firewall. Adolfo PS: Passou o texto da mensagem pelo Babylon Fish? ;) -----Original Message----- I have a problem for sending of email for a server specify. Emails that sent for any another server in the Internet arrives ok. I tried to make telnet for door 25 of the destination server and conection is not opened. I am using shorewall 1.4.8, some ideia of that it can be happening?
On Tuesday 27 January 2004 08:44 am, Iuri Pereira Souza wrote:> Hi, > > I have a problem for sending of email for a server specify. Emails that > sent for any another server in the Internet arrives ok. I tried to make > telnet for door 25 of the destination server and conection is not opened. > I am using shorewall 1.4.8, some ideia of that it can be happening? >Do you have ECN enabled on the system from which you are trying to connect? On that system: cat /proc/sys/net/ipv4/tcp_ecn If that returns 1, try: echo 0 > /proc/sys/net/ipv4/tcp_ecn If you can now connect, you will want to arrange for that command to be executed during startup. On most systems, you can set entries in /proc using an entry in /etc/sysctl.conf. -Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ teastep@shorewall.net
Ola, Tuesday, January 27, 2004, 2:56:23 PM, : Tom> On Tuesday 27 January 2004 08:44 am, Iuri Pereira Souza wrote:>> Hi, >> >> I have a problem for sending of email for a server specify. Emails that >> sent for any another server in the Internet arrives ok. I tried to make >> telnet for door 25 of the destination server and conection is not opened. >> I am using shorewall 1.4.8, some ideia of that it can be happening? >>Tom> Do you have ECN enabled on the system from which you are trying to connect? Tom> On that system: Tom> cat /proc/sys/net/ipv4/tcp_ecn Tom> If that returns 1, try: echo 0 >> /proc/sys/net/ipv4/tcp_ecn Tom> If you can now connect, you will want to arrange for that command to be Tom> executed during startup. On most systems, you can set entries in /proc using Tom> an entry in /etc/sysctl.conf. Tom> -Tom Yesssssssssssssssssss Tom.... :) Thanks... Now, i configure /etc/shorewall/ecn and put my external interface and destination host and resolve my problem too. RTFM always... :) Thanks a lot, Tom.... :) Atenciosamente, ++++++++++++++++++++++++++++++++++++++++ IURI PEREIRA SOUZA iuri@doctornet.com.br DoctorNet Redes e Conectividade Ltda Av. Fernando Osorio,20 Loja 19C Pelotas/RS CEP 96065-000 Fone: (53) 222-9559 Cel: (53) 9982-6212 http://www.doctornet.com.br ++++++++++++++++++++++++++++++++++++++++
Ola, Tuesday, January 27, 2004, 2:52:39 PM, : Adolfo> The problem is probably with the server then, not with your Adolfo> firewall. Adolfo> Adolfo Adolfo> PS: Passou o texto da mensagem pelo Babylon Fish? ;) A dica do Tom ja resolveu... :) Passei sim... o meu ingles nao ta tao bom... :)))) Abracos... ps: como tu descobriu ?? :) Adolfo> -----Original Message----- Adolfo> I have a problem for sending of email for a server specify. Emails that Adolfo> sent for any another server in the Internet arrives ok. I tried to make Adolfo> telnet for door 25 of the destination server and conection is not opened. Adolfo> I am using shorewall 1.4.8, some ideia of that it can be happening? Atenciosamente, ++++++++++++++++++++++++++++++++++++++++ IURI PEREIRA SOUZA iuri@doctornet.com.br DoctorNet Redes e Conectividade Ltda Av. Fernando Osorio,20 Loja 19C Pelotas/RS CEP 96065-000 Fone: (53) 222-9559 Cel: (53) 9982-6212 http://www.doctornet.com.br ++++++++++++++++++++++++++++++++++++++++