From: Nicolas Lécureuil <neoclust(a)mageia.org&gt; RFC952 mandated that hostnames would start with an alpha character. This requirement was later relaxed by RFC1123 which allowed hostnames to start with a number as well. https://datatracker.ietf.org/doc/html/rfc952 https://datatracker.ietf.org/doc/html/rfc1123#page-13 Signed-off-by: Nicolas Lécureuil <nicolas.lecureuil(a)siveo.net&gt; Reviewed-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- Pushed after review of a trivial merge request. src/conf/network_conf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c index 10d3330fdf..c769bbaeb5 100644 --- a/src/conf/network_conf.c +++ b/src/conf/network_conf.c @@ -548,7 +548,7 @@ virNetworkDHCPHostDefParseXML(const char *networkName, } name = virXMLPropString(node, "name"); - if (name && (!g_ascii_isalpha(name[0]))) { + if (name && !(g_ascii_isalpha(name[0]) || g_ascii_isdigit(name[0]))) { virReportError(VIR_ERR_XML_ERROR, _("Cannot use host name '%s' in network '%s'"), name, networkName); -- 2.34.1