Hi, [pjproject 1.8.10] It looks like the pjsip_resolve function does not handle resolving a hostname to IPv6 address. I was using --outbound to set the outbound proxy. I had set up my /etc/hosts file to resolve the value used in --outbound to an ipv6 address. However the resolution is failing. I looked at the pjsip_resolve function in sip_resolve.c file It looks like the function is properly setting the IPv6 flag for explicit IPv6 address (ip_addr_ver==6) but i think it is missing the logic to do the same if ip_addr_ver == 0 . I am assuming ip_addr_ver=0 indicates it is not an IP address and in this case there must be some logic to add the IPv6 flag? May be look at the --ipv6 flag on the account or something. Any help/patch to get around this? Thanks DP -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20110130/a6c28c1e/attachment.html>