using curl with php cannot connect peer reset

Question

Trying to find why the connection is reset by peer. Any idea what to look for in wireshark or how to troubleshoot correctly to find a solution?

curl --tlsv1.0 https://www.xxx.com -v

Hostname was NOT found in DNS cache
  Trying ipaddress...
Connected to xxxx.com (ipaddress) port 443 (#0)
Initializing NSS with certpath: sql:/etc/pki/nssdb
  CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
NSS error -5961 (PR_CONNECT_RESET_ERROR)
TCP connection reset by peer
Closing connection 0
curl: (35) TCP connection reset by peer

cat /etc/*-release NAME="Red Hat Enterprise Linux Server" VERSION="7.0 (Maipo)" ID="rhel" ID_LIKE="fedora" VERSION_ID="7.0" PRETTY_NAME="Red Hat Enterprise Linux Server 7.0 (Maipo)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:redhat:enterprise_linux:7.0:GA:server" HOME_URL="redhat.com" BUG_REPORT_URL="bugzilla.redhat.com" REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7" REDHAT_BUGZILLA_PRODUCT_VERSION=7.0 REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" REDHAT_SUPPORT_PRODUCT_VERSION=7.0 Red Hat Enterprise Linux Server release 7.0 (Maipo) — amanda fouts
– amanda fouts, Commented Nov 11, 2014 at 23:10
[root@ip-10-0-0-197 ec2-user]# uname -a Linux ip-10-0-0-197.ec2.internal 3.10.0-123.8.1.el7.x86_64 #1 SMP Mon Aug 11 13:37:49 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux — amanda fouts
– amanda fouts, Commented Nov 11, 2014 at 23:12

Community · Accepted Answer · 2017-04-13 12:13:38Z

1

Changing AWS default MTU was the answer for me. Curl, etc. worked fine after that.

To make the setting permanent for eth0, edit the configuration file /etc/sysconfig/network-scripts/ifcfg-eth0 and add the line MTU=1200 as shown below:

DEVICE=eth0
MTU=1500
BOOTPROTO=dhcp
ONBOOT=yes
TYPE=Ethernet

Then, restart the interface (as root): service network restart eth0

Resources: https://serverfault.com/questions/594727/openssl-hangs-after-client-hello http://www.redhat.com/magazine/002dec04/departments/tips_tricks/

edited Apr 13, 2017 at 12:13

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answered Nov 12, 2014 at 4:55

amanda fouts

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1 Comment

William W Over a year ago

If you're using Amazon Linux AMI, the file to edit is /etc/dhcp/dhclient-eth0.conf or /etc/dhcp/dhclient.conf. Your resources helped me figure this out. Link to this change since it also requirins adding a different line to the file: docs.aws.amazon.com/AWSEC2/latest/UserGuide/…

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